Summary: Theoretical models posit that the perception of situations consists of two components: an objective component attributable to the situation being perceived and a subjective component attributable to the person doing the perceiving (Murray, 1938; Rauthmann, 2012; Sherman, Nave & Funder, 2013; Wagerman & Funder, 2009). In this study participants (N = 186) viewed three pictures from the Thematic Apperception Test (TAT; Murray, 1938) and rated the situations contained therein using a new measure of situations, the Riverside Situational Q-Sort (RSQ; Wagerman & Funder, 2009). The RSQ was used to calculate the overall agreement among ratings of situations and to examine the objective and subjective properties of the pictures. These results support a twocomponent theory of situation perception. Both the objective situation and the person perceiving that situation contributed to overall perception. Further, distinctive perceptions of situations were consistent across pictures and were associated with the Big Five personality traits in a theoretically meaningful manner. For instance, individuals high in Openness indicated that these pictures contained comparatively more humor (r = .26), intellectual stimuli (r = .20), and raised moral or ethical issues (r = .19) than individuals low on this trait.

Thesis (M.A.) – Florida Atlantic University, 2013.

Summary: Autism is a neurodevelopmental disorder that is characterized by deficits involving social interaction, communication, and perception. Although there is much research that has examined functional neural connectivity in individuals with autism, few have conducted these studies in very young children while awake across EEG power and coherence measures. Anomalies in EEG coherence and power have been associated with deficits in executive function and mental activity. The present study examined neural activation and functional connectivity with an EEG, in children ages 3 -5, during an eyesclosed baseline period. Discrete Fourier Transform was performed on artifact-free segments of EEG data to produce power density values. In addition, coherence measurements were examined to assess functional connectivity in the alpha bandwidth during the baseline recording. Children with autism spectrum disorder (ASD) demonstrated reduced alpha coherence in fronto-temporal regions and between right temporal sites when compared to typically developing (TD) children. In addition, the reduction in coherence was based on ASD severity, such that high-functioning children with ASD showed greater coherence than low-functioning children with ASD. Children with ASD also displayed reduced power in the alpha, beta, and theta frequency bandwidths in frontal, temporal, central, and occipital regions compared to TD children. Interestingly, delta power differentiated children based on developmental status such that high-functioning children with ASD demonstrated the greatest delta power, followed by TD children, and then low-functioning children with ASD. Finally, TD children demonstrated left anterior temporal EEG asymmetry in the alpha bandwidth, whereas children with high-functioning ASD exhibited left posterior temporal EEG asymmetry and right frontal EEG asymmetry. Thus, the results suggest that children with ASD exhibit atypical patterns of brain activity and functional connectivity compared to their typically developing counterparts.

Dissertation (Ph.D.) – Florida Atlantic University, 2013.

Summary: As adolescents transition to middle school, math confidence and performance declines (Eccles et al., 1993; Lee, Statuto, & Kadar-Voivodas, 1983). These declines are typically attributed to social and maturational changes (Eccles, Lord, & Midgley, 1991; Simmons & Blyth, 1987). In this dissertation, I explore the hypothesis that low parent support for schoolwork is also responsible. Latino-American adolescents are especially at risk for math difficulties. Maintaining adolescents’ engagement and performance in math are important goals for mothers because high levels of both are requisites for many professional careers. This dissertation will focus on Latino-American families to determine if mothers’ homework involvement is associated with changes in children’s math-related outcomes across the transition to secondary school. Parental involvement in math homework is assumed to mitigate declines in math performance during this transition. Cognitive models suggest that involved parents utilize scaffolding (Rogoff & Gardner, 1984) and instruction to ensure math achievement (Pomerantz & Moorman, 2010). Motivational models suggest that involved parents foster math engagement by bolstering child confidence, modeling management strategies, and promoting values that encourage children to work hard (Grolnick & Slowiaczek, 1994; Simpkins, Fredricks, & Eccles, 2015). However, empirical evidence in support of the importance of parents in math achievement is limited. While positive forms of involvement co-occur with better math outcomes (Bhanot & Jovanovic, 2005; Rice et al., 2013), no studies have examined such associations longitudinally. Children who are uninterested in math may be more susceptible to the effects of parental homework involvement because they lack internal motivation for mastery that underlies performance in other children. The present study examines the extent to which Latina-American mothers’ involvement in math homework is effective in preventing declines in child math-related outcomes (i.e., perceptions of math ability, etc) during the transition to middle school. Child math interest was postulated to moderate this association. Results indicated that low maternal homework involvement predicts worsening child math-related outcomes, but only for children who were intrinsically uninterested in math. The findings hold important implications for parents, who must work to ensure that they remain engaged in their children’s activities, especially if children appear uninterested in math.

2017

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2017.

Collection: FAU

Summary: Throughout the course of a day, individuals experience a number of different situations that affect how they think, feel, and behave. However, until recently, there was little research aimed at describing what factors may be related to the psychological properties of situations in individuals' everyday lives. Recent theoretical (e.g., the Situational Eight DIAMONDS) and methodological (e.g., experience sampling, Day Reconstruction Method) advances make the present research tractable. Based on the extant literature, three studies, employing different methodologies, were designed to explore whether three specific factors are related to the experience of situations: time of day, gender, and employment status. Study 1 employs data from 835 participants recruited on Amazon's Mechanical Turk (AMT). Participants reported a recent situation (single time-point method) and completed a 290-item measure of situations, the Comprehensive Situations Item Pool (CSIP). The results demonstrated consistent daily patterns in the experience of situations. For example, the situational characteristic Duty tends to increase throughout the day, peak at noon, decreasing thereafter. Study 2 uses an experience sampling method to further investigate the daily and weekly temporal patterns in the situational characteristics from a within-person perspective. University participants (N = 210) were contacted via smartphone and rated their situation up to 8 times per day for 7 days. The results showed that there are some similarities and differences in the temporal pattern of situations at the within-person level. Duty, for instance, exhibits a different pattern depending on the day of the week (e.g., negative and linear on weekends, but quadratic on weekdays). Overall, Study 2 demonstrates that there are clear within- and between-day patterns in situation characteristics. Lastly, Study 3 employs a full-day method using archival data from the 2013 American Time Use Survey (ATUS). Participants drawn from a representative sample of Americans (N = 11,384) reported all of their situations for a recent day using the Day Reconstruction Method. The results found that, in addition to consistent daily and weekly trends, patterns for situation characteristics are related to individual differences such as gender and employment status.

2016

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2016.

Collection: FAU

Summary: To elucidate temporal sequences among and between person and situation variables, this work examines cross-measurement spill-overs between situation experiences S (on the Situational Eight DIAMONDS characteristics) and personality states P (on the Big Six HEXACO) in experience sampling data in two studies. Multilevel modeling of lagged data at tn-1 and non-lagged data at tn grants the opportunity to examine (a) the stability (P  – > P, S  – > S), (b) cross-sectional associations (S < – > P), and (c) cross-lagged associations among and between situation experiences and personality states (S  – > P, P  – > S).

2017

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2017.

Collection: FAU

Summary: Kersten, Earles, and Berger (2015) reported a distinction between two kinds of motion representations. Extrinsic motions involve the path of a person or object, with respect to an external frame of reference. Intrinsic motions involve the manner in which the various parts of a person or object move. They found that intrinsic motions are encoded and remembered with the corresponding actor performing the motions in a unitized memory representation. Extrinsic motions are encoded as separate memory representations, making them more difficult to accurately associate with the correct actor. In the proposed experiment, I will examine the generality of this distinction in motion representation, and investigate whether the unitization of intrinsic motion with its corresponding actor occurs during reading comprehension tasks.

2016

Degree granted:

Collection: FAU

Summary: Research in second language acquisition reveals that adults have difficulty learning the grammatical aspects of a foreign language. The present study investigated the efficacy of three teaching methods that were predicted to help adults better learn the grammar of a foreign language. First, lessons were presented in small pieces that gradually increased to full sentences. Second, lesson trials were blocked such that multiple examples of sentences with the same object or verb were presented consecutively. Third, participants were instructed to gesture the actions of the verbs within sentences. All three methods were predicted to increase the likelihood of learning the grammar form of sentences through guiding adults’ attention to fewer components of language input at a time. In Experiment 1, 82 English native speakers played an adventure videogame designed for the learning of French vocabulary and grammar of French sentences for two one-hour sessions. All three methods were incorporated in the lessons portion of the game resulting in a 2(incremental vs. full sentence) X 2(blocked vs. unblocked order) X 2(gesture vs. no gesture) between subjects design. The results from Experiment 1 revealed a) more nouns were acquired than verbs and b) a trend that the incremental conditions performed worse than the full sentence conditions on the grammar measures. In Experiment 2, 110 adult learners played the French videogame, but only the blocked presentation and gesture imitation methods were incorporated in the lessons portion (omitting the method of incremental presentation). The results from Experiment 2 revealed a) conditions with either method of blocked presentation or gesturing performed better on vocabulary and grammar measures than the unblocked non-gesture condition, and b) the combination of blocked presentation and gesturing led to better learning of inductive grammar than either method alone. The outcome of the study suggests gesturing and blocked order teaching methods that encourage adults to attend to a few but important components within a sentence are advantageous in learning the grammar of a foreign language.

2014

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: The current study examined the effects of kangaroo care on breastfeeding practices, infant stress reactivity, and biobehavioral measures of mother-infant bonding across the first 3 months postpartum. Additionally, the role of breastfeeding in infant cortical maturation in the frontal lobe was examined. Thirty two mother-infant dyads participated in the current study; 16 mother-infant dyads were randomly assigned to the kangaroo care group and 17 mother-infant dyads were assigned to the control group. Mothers in the kangaroo care group received training on proper kangaroo care procedures by a trained administrator during the first 1-2 weeks postpartum. Mothers in the kangaroo care group were asked to use the kangaroo care procedure for 1 hour per day for 6 weeks. Maternal perceptions of fetal attachment, mood, feeding intentions, and urinary oxytocin measurements were assessed prenatally. At a newborn visit, infant neurobehavioral functioning and urinary oxytocin measurements were assessed. Maternal mood and feeding practices were also assessed at the newborn visit. At 3 months postpartum, mother-infant dyads were assessed on urinary oxytocin measurements. Mother-infant dyads were recorded during a play session and feeding session. Infant baseline EEG recordings were taken over a 5 minute period. Infant cortisol measurements were collected from infant saliva before and after a mild behavioral stressor, an infant arm restraint procedure. Maternal perceptions of postpartum bonding, mood, infant temperament, and feeding practices were also assessed. Results indicate that kangaroo care produced medium to large effects on cortisol reactivity, dyadic bonding, and breastfeeding practices if kangaroo care was practiced for the recommended amount of time. Kangaroo care produced medium to large effects on oxytocin levels in motherinfant dyads regardless of use. Cortical measures of infant frontal activity indicated that all infants in the samples displayed functional maturity of the frontal lobe. Kangaroo care can be used a viable, low-cost tactile procedure that can be implemented after birth to aid in breastfeeding practices, mother-infant bonding, and lower infant stress reactivity. Infants in the study who received at least one breastfeeding session displayed advanced patterns of frontal activation. Further study is needed to determine if peripheral oxytocin measurements are 1) reliable and 2) are indicative of dyadic bonding behaviors.

2014

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: Adolescent friendships are critical for adjustment but are extremely unstable. Dyadic characteristics may put friendships at risk for dissolution, whereas individual characteristics may put individuals at risk for participating in unstable friendships. The present study examines whether dyadic or individual school-related characteristics predict rates of adolescent friendship dissolution. A sample of 410 adolescents (n=201 males, 209 females; M age=13.20 years) participated in 573 reciprocated friendships originating in the 7th grade which were followed from 8th-12th grade. Discrete-time survival analyses evaluated grade 7 dyadic and individual characteristics (sex, age, ethnicity, number of friends, peer acceptance, peer rejection, leadership, and school competence) as predictors of the occurrence and timing of friendship dissolution. Dissimilarity in sex, peer acceptance, and school competence and similarity in leadership predicted higher rates of friendship dissolution; individual characteristics were not significant predictors. Adolescents seeking friendships with more skilled individuals risk suffering the downside of dissimilarity, namely dissolution.

2014

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: Bilingual children sometimes respond to their interlocutors using a different language than the one in which they were addressed. These language choices, their concurrent correlates, and relations to subsequent language growth were examined in 91 Spanish-English bilingual children (44 girls, 47 boys). Children's language choices were assessed at 30 months, and their English and Spanish productive vocabularies and receptive language skills were examined at the ages of 30, 36, and 42 months. Children's language choices were concurrently related to English and Spanish productive and receptive language scores and to mothers' English and Spanish proficiency levels. Longitudinal multi-level modeling analyses indicated that children's language choices at 30 months were uniquely related to language growth on measures of English and Spanish productive vocabulary and Spanish receptive language, when controlling for language expo sure. These findings suggest that language use plays a causal role in language development. The findings of this study have implications for the maintenance of heritage languages in the U.S. and for the development of children's English language skills.

2015

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2015.

Collection: FAU

Summary: Visual motion can be conveyed by a variety of information sources in the environment, and those types of information may be detected at various levels by different motion-perceiving mechanisms in the visual system. High-level visual information has been demonstrated to have 3rd order, or salience-based properties (Lu & Sperling, 1995). The perceptual system they describe that computes motion from these types of information shares several characteristics with Hock and colleagues' counterchange detection system, notably flexibility with respect to types of input from which motion can be computed, which comes at the cost of diminished processing speed. The mechanism of counterchange detection is well suited to processing visual features often present in environmental scenes, e.g., objects and surfaces, and may be a mechanism of 3rd order motion. Consistent with reported properties of 3rd order motion, the current experiments tested count erchange-, luminance-, and color-based motion stimuli with 3 objectives: to identify whether the 3 systems framework generalizes beyond the stimulus type with which it was defined, to test whether counterchange shares similarities with the 3rd order system with respect to dichoptic integration, and perception of isoluminant color-based motion, and to test subjectively objectless sources of motion-defining information (spreading luminance and hue) to see if they display properties of the 1st order system derived from sine wave gratings. Results indicate that counterchange-based stimuli displayed predicted properties of dichoptic integration, and perception at isoluminance, but putative 1st order (spreading) stimuli also displayed these properties. This may suggest that object-like surfaces, even when not directly the source of motion information, can contribute to computation of motion. Further, these results highlight the difficulty of generalizing from one theoretical framework to another, and specifically, of psychophysically testing high-level information while isolating contributions from low level information upon which high level visual stimuli are built.

2015

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2015.

Collection: FAU

Summary: Small conductance Ca2+-activated K+ (SK) channels have been shown to alter the encoding of spatial and non-spatial memory in the hippocampus by shaping glutamatergic postsynaptic potentials and modulating NMDA receptor-dependent synaptic plasticity. When activated, dendritic SK channels reduce hippocampal neuronal excitability and LTP. Similar SK channel properties have been demonstrated in lateral amygdala (LA) pyramidal neurons. Additionally, induction of synaptic plasticity and beta-adrenoreceptor activation in LA pyramidal neurons causes PKA-mediated internalization of SK channels from the postsynaptic density. Chronic activation of the amygdala through repetitive stressful stimuli can lead to excitatory synaptic strengthening that may create permanent hyper-excitability in its circuitry. This mechanism may contribute to a number of mood and anxiety disorders. The selective influence of SK channels in the LA on anxiety and fear conditioning are not known. The thesis project outlined herein examined whether SK channel blockade by bee venom peptide, apamin, during a repetitive acute fear conditioning paradigm was sufficient to alter fear memory encoding and the resulting behavioral outcome. Following the final fear memory test session, mice were tested in the open field immediately after the second fear conditioning test session. The findings indicate that intracranial LA microinfusions of apamin did not affect memory encoding or subsequent anxiety.

2015

Degree granted: Thesis (M.S.) – Florida Atlantic University, 2015.

Collection: FAU

Summary: Many studies have supported the overall health benefits of mindfulness meditation practices for adults, but research exploring such benefits for children is sparse. The present study explored the psychophysiological effects of mindfulness meditation over a 10 week-period on a sample of 2nd-and 4th-grade children. Electroencephalograph (EEG) asymmetry and coherence were recorded at baseline and immediately after the meditation intervention for the experimental group, and at baseline and after 10 weeks for the control group. Measures of affect, behavioral motivation, creativity, and depression were also administered. The primary findings indicated that when improvement in depressive symptoms occurred for 4th-grade students who were somewhat engaged in meditation practice, left-sided frontal EEG activity was also more prominent. Additionally, 4th-grade students who actively participated in meditation practice experienced decreases in self-reported levels of negative affect. Results suggest that mindfulness meditation is beneficial for improving 4th-grade students’ mood and brain regions associated with mood.

2014

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: Agency and communion are fundamental dimensions underlying psychological processes. Although agency and communion are coherent dimensions, their origins, nature, stability differ across theoretical framework. Common to these frameworks are gender differences in agency and communion. The present study hypothesized that because agency and communion relate to gender, they may also relate to digit ratio. The present study is important because digit ratio may offer clues on the origins and nature of agency and communion, and their gender differences. Agency and Communion factors were extracted from implicit linguistic measures obtained by LIWC analysis of selfnarratives. Exploratory structural equation modeling indicated communion related to digit ratio in men, and gender differences in communion. Although the results supported the distal, biological influences of communion argued by evolutionary accounts, the null finding agency was not related to digit ratio, while not directly interpretable, did not contradict socialization accounts of agency.

2014

Degree granted: Thesis (M.S.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: Prior research has explored the counterchange model of motion detection in terms of counterchanging information that originates in the stimulus foreground (or objects). These experiments explore counterchange apparent motion with regard to a new apparent motion stimulus where the necessary counterchanging information required for apparent motion is provided by altering the luminance of the background. It was found that apparent motion produced by background-counterchange requires longer frame durations and lower levels of average stimulus contrast compared to foreground-counterchange. Furthermore, inter-object distance does not influence apparent motion produced by background-counterchange to the degree it influences apparent motion produced by foreground-counterchange.

2014

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: The current study assessed whether the accuracy of children’s self-reports of events experienced differs as a function of age and how the question is asked. Additional factors like metamemory and distractibility were assessed. Primary-school students (M= 7.7 years) and middle-school students (M = 9.7 years) completed two different versions of an event frequency measure, two times, at one week intervals. In one of the measures of event frequency, no memory prompts were provided (uncued questionnaire condition), while in the other measure, recall categories for aiding recollections were provided (cued questionnaire condition). Participants’ self-reported event frequencies for the cued and uncued questionnaires were compared with trained observers’ event frequencies for the cued and uncued conditions. Older children reported event frequency more accurately than younger participants. Participants also reported events with greater accuracy with the aid of memory prompts than without, an effect that was especially strong among the younger children. Neither metamemory nor distractibility was accountable for the differences within age groups. The findings suggest that age-related improvements in accuracy of event frequency across the transition into adolescence may, in part, be due to improvements in the ability to recall and recount those events in the absence of memory cues.

2014

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: Evidence in humans suggests that men are especially competitive with other men over resources and, if successful, are valued as attractive mating prospects by women. Previous studies also show that men experience an increase in testosterone following a win and a decrease in testosterone following a loss. If an increase in testosterone following a victory is an evolved physiological response aimed at readying a man for an increase in mating opportunities, then experimentally manipulating competitive outcomes should differentially affect men’s sex-drive. One-hundred thirteen men were randomly assigned to experience a win, a loss, or no competitive feedback. Participants’ sex-drive was gauged by their responses to photographs of women of differential attractiveness. Results showed that only single men exhibited a higher sex-drive in the winning condition, followed by the control and losing conditions, respectively. Limitations and practical applications to decreasing instances of rape and sexual coercion are discussed.

2014

Degree granted: Thesis (M.S.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: The practice of evaluating situations with the Riverside Situational Q-Sort (RSQ:Wagerman & Funder, 2009) is relatively new. The present study aimed to investigate the theoretical framework supporting the RSQ with regards to the potential confounds of emotional state and the use of Likert-type ratings. Data were collected from a sample of Florida Atlantic University students (N = 206). Participants were primed for either a positive or negative mood state and asked to evaluate a situation with the RSQ in either the Q-Sort or Likert-type response format. Results suggested that response format has a significant influence on RSQ evaluations, but mood and the interaction between mood and response format do not. Exploratory analyses were conducted to determine the underlying mechanisms responsible.

2014

Degree granted: Thesis (M.S.) – Florida Atlantic University, 2014.

Collection: FAU

Summary: The current study examined the possibility of using cluster analysis to classify attachment styles in middle childhood. Attachment classifications were measured by looking at child coping strategies and perceived maternal behavior. The attachment classification was then tested for construct validity by examining whether it can predict adjustment outcomes in interpretable patterns. The adjustment outcomes examined were a self-reported global self-worth scale and peer-reported internalizing and externalizing behaviors measured using a Peer Nomination Inventory. The current study had 199 third through eight graders and provided evidence for the cluster analysis approach and also showed that the disorganized attachment was associated with the most adverse adjustment outcomes. That is, results showed that disorganized attachment was linked with the lowest levels of global self-worth and the highest rates of internalizing and externalizing behaviors and was significantly different from the securely attached cluster on each measure. The implications and possible underlying causes are discussed.

2015

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2015

Collection: FAU

Summary: Children exhibit neotenous, or physically immature, features, such as a large rounded head relative to body size, adult-sized eyes, round cheeks, a small chin, and a short narrow nose. Bowlby (1969) and others (Eibl-Eibesfeldt, 1989; Hrdy, 2005) propose that, in species whose young depend on care from an adult, these features could enhance offspring survival. Lorenz (1943) argued that adult humans are particularly attracted to these features, and that these characteristics, which he termed Kindchenschema or “baby schema,” trigger a cognitive system that processes and reacts specifically to infantile features for the purpose of enhancing motivation to engage in caretaking behaviors. The goal of the studies proposed here is to examine the behavioral, attentional, and emotional effects of baby schema.

2015

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2015

Collection: FAU

Summary: From syllables to fluent speech, it is important for infants to quickly learn and decipher linguistic information. To do this, infants must not only use their auditory perception but also their visual perception to understand speech and language as a multisensory coherent event. Previous research by Lewkowicz and Hansen-Tift (2012) demonstrated that infants shift their allocation of visual attention from the eyes to the mouth of the speaker's face throughout development as they become interested in speech production. This project examined how infants, from 4-14-months of age, allocate their visual attention to increasingly complex speech tasks. In Experiment 1, infants were presented with upright and inverted faces vocalizing syllables and the results demonstrated that in response to the upright faces, 4-month-old infants attended to the eyes and 8- and 10-month-olds attended equally to the eyes and mouth. In response to the inverted face presentation, both the 4- and 10-month-olds attended equally to the eyes and mouth but the 8-month olds attended to the eyes. In Experiment 2, infants were presented with a phoneme matching task (Patterson & Werker, 1999, 2002, 2003) and the results demonstrated that the 4-month-old infants successfully matched the voice to the corresponding face, but that older infants did not. Measures of their selective attention to this task showed that the 4-month-old infants attended more to the eyes of the faces during the task, not attending to the redundant speech information at the mouth, but older infants attended equally to the eyes and mouth, although they did not match the voice to the face. Experiment 3 presented infants with a fluent speech matching task (Lewkowicz et al., 2015) which demonstrated that although the infants (12-14-months) did not systematically match the voice to the corresponding face, the infants attended more to the mouth region, which would have provided them with the neces sary redundant information. Overall, these studies demonstrate that there are developmental changes in how infants distribute their visual attention to faces as they learn about speech and that the complexity of the speech is a critical factor in how they allocate their visual attention.

2015

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2015.

Collection: FAU

Summary: Previous research has shown that the intrapersonal characteristics (e.g., temperament) of children are associated closely with alterations in the functioning of the hypothalamic-pituitary–adrenal (HPA) stress axis. However, consistently capturing direct associations between these characteristics and stress reactivity of the HPA axis has, at times, yielded disparate findings. Thus, using the Rothbart model of temperament (Rothbart & Derryberry, 1981) as a guide, the main goal of this project was to investigate and identify intrapersonal characteristics that moderate associations between other intrapersonal characteristics of the child and stress reactivity during development (e.g., trait by trait interactions). Additionally, study variables were assessed for meaningful associations and, on average differences between those who responded to the stressor paradigm and those who did not. A sample of 45 male and 37 female students (n=82, M= 9.66 yrs.) from six, fourth and fifth grade classes partook in a mathematically based stressor paradigm administered in the classroom. Salivary cortisol and behavior measures were collected in two waves over a 7-week period. Several significant results emerged. Overall, children who responded to the stressor paradigm had significantly higher levels of traits associated with a more inhibited behavioral style. Further, several meaningful interactions surfaced in which intrapersonal characteristics of various categories, including reactive, regulatory, and ambiguous, interacted with one another to predict stress reactivity. Of note, the majority of the interactions involved self-regulation and surgency. These two intrapersonal characteristics interacted with several others, helping to elucidate the unique influences of these intrapersonal characteristics on each other and, subsequently, stress reactivity of the HPA axis. These results illustrate that interactions between multiple intrapersonal characteristics should be taken into consideration in the future when studying the relationships between intrapersonal characteristics and stress reactivity of the HPA axis.

2017

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2017.

Collection: FAU

Summary: The current studies tested the hypothesis, that early exposure is sufficient for nativelike proficiency. Study 1 compared the English skill of 116 5 year olds who had been exposed to English and Spanish from birth with English monolingual and found that the bilingual children had significantly lower levels of vocabulary skill. Study 2 assessed 65 adult bilinguals, comparing them to 25 English and 25 Spanish monolinguals on a battery of language measures. The bilinguals had lower scores in Spanish in 7 of the 8 domains of language skill measured. The bilinguals were not different from the English monolingual speakers in most, but not all, aspects of language proficiency. These findings provide evidence that the monolingual-bilingual gap observed in childhood is no longer evident among adult bilinguals, but that despite early exposure and continued use into adulthood, second generation immigrants are not native-like in their heritage language skills.

2017

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2017.

Collection: FAU

Summary: Bilinguals commonly report experiencing emotions differently depending on which language are they speaking. Emotionally loaded words were expected to be appraised differently in first versus second language in a sample of Spanish-English bilinguals (n=117). English (L2) ratings were subtracted from Spanish (L1) ratings; the resulted scores were used as dependent variable in the analyses. Three categories of words (positive, negative and taboo) were appraised in both languages (English and Spanish)and two sensory modalities (Visual and auditory). The differences in valence scores in Spanish (L1) and English (L2) were expected to be significantly higher when presented aurally than when presented visually. Additionally, taboo words were expected to yield larger differential scores than negative and positive words. The 2 X 3 general linear model (GLM) revealed no significant effect of sensory modality but a significant effect of word type. Additional analyses of the influence of language and sensory modality within each word category resulted in significant differences in ratings between languages. Positive word ratings were higher (more positive) in English than in Spanish.

2015

Degree granted: Thesis (M.S.) – Florida Atlantic University, 2015.

Collection: FAU

Summary: The present study investigated the relation of children’s attentional behaviors to context, gender, and their language skills. Participants were 33 children and their parents. The following attentional behaviors were measured based on coding of video recordings of 30-minute free-play interactions at 30 months: time spent in engaged states (attending to an object, person, or event) and frequency of changes from one engagement state to another. Children’s productive vocabulary and language comprehension were measured using standardized tests at 30, 36, and 42 months. Males spent more time in joint engagement and switched engagement states less frequently. Children spent more time engaged during Animal and Picnic toy play than Book reading. Children attended longer to picnic-related objects than animal-related objects or books, and attended longer to animal- related objects than books. Longer sustained attention—measured as lower frequencies of state switches—was related to higher concurrent and future language comprehension scores.

2015

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2015.

Collection: FAU

Summary: Our everyday world consists of people and objects that are usually specified by dynamic and concurrent auditory and visual attributes, which is known to increase perceptual salience and, therefore, facilitate learning and discrimination in infancy. Interestingly, early experience with faces and vocalizations has two seemingly opposite effects during the first year of life, 1) it enables infants to gradually acquire perceptual expertise for the faces and vocalizations of their own race and, 2) it narrows their ability to discriminate the faces of other-race faces (Kelly et al., 2007). It is not known whether multisensory redundancy might help older infants overcome the other-race effect reported in previous studies. The current project investigated infant discrimination of dynamic and vocalizing other-race faces in younger and older infants using habituation and eye-tracking methodologies. Experiment 1 examined 4-6 and 10-12-month-old infants' ability to discriminate either a native or non-native face articulating the syllable /a/. Results showed that both the 4-6- and the 10-12-month-olds successfully discriminated the faces,regardless of whether they were same- or other-race faces. Experiment 2 investigated the contribution of auditory speech cues by repeating Experiment 1 but in silence. Results showed that only the 10-12-month-olds tested with native-race faces successfully discriminated them. Experiment 3 investigated whether it was speech per se or sound in general that facilitated discrimination of the other-race faces in Experiment 1 by presenting a synchronous, computer-generated "boing" sound instead of audible speech cues. Results indicated that the 4-6-month olds discriminated both types of faces but that 10-12-month-olds only discriminated own-race faces. These results indicate that auditory cues, along with dynamic visual cues, can help infants overcome the effects of previously reported narrowing and facilitate discrimination of other-race static, silent faces. Critically, our results show that older infants can overcome the other race-effect when dynamic faces are accompanied by speech but not when they are accompanied by non- speech cues. Overall, a generalized auditory facilitation effect was found as a result of multisensory speech. Moreover, our findings suggest that infants' ability to process other- race faces following perceptual narrowing is more plastic than previously thought.

2015

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2015.

Collection: FAU

In some cases, as much as 9% of participants in self-report studies are extremely inattentive (Maniaci & Rogge, 2014). Previous researchers have dealt with this problem by removing inattentive participants from data analyses. A better solution would be to prevent inattentive responding. Self-Determination Theory may provide an effective approach to reducing inattentive responding, specifically by attempting to promote autonomous motivation in research participants. Providing participants with personalized feedback may increase participants’ autonomous motivation, which in turn may lead to more attentive responding. Study 1 showed that participants who are interested in feedback are more attentive throughout an online survey than participants who are not interested in feedback. The next goal was to show through experimental manipulation that emphasizing the opportunity to receive personalized feedback would decrease levels of inattentive responding and increase autonomous motivation. No significant difference occurred between groups in levels of inattention, nor in autonomous motivation.

2018

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2018.

Collection: FAU

Deciding what information we attend to has implications on our ability to remain valuable and productive in our respective academic and economic domains. This study investigated if attentional switching due to information technology interruptions would deplete resources in a unique way and impair performance on a response inhibition task. Three groups were compared on the Simon task after participants either did or did not receive interruptions during a self-regulation task. Unexpectedly, a larger Simon effect was found for participants who did not receive interruptions. These results conform to previous evidence showing sustained directed attention may result in depletion and effect subsequent inhibitory control. Although not supporting predictions, these results may provide a basis for further research, particularly because younger generations are developing in a more connected world than preceding generations. By understanding these differences, younger generations may better adapt to technological advances and leverage them to their advantage.

2018

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2018.

Collection: FAU

The types of intrusion errors (Prior List, Semantically Related, and Unrelated) made on the LASSI-L verbal memory task were compared across three diagnostic groups (N = 160, 61 % female), Cognitively Normal (CN), amnestic Mild Cognitive Impairment (aMCI), and Alzheimer’s disease (AD). Errors related to Proactive, Recovery from Proactive, and Retroactive Interference were also analyzed, as well as the relationship of errors to Amyloid load, a biomarker of AD. Results suggest that the types of error made indicated the level of cognitive decline. It appears that as deficits increase, impaired semantic networks result in the simultaneous activation of items that are semantically related to LASSI-L words. In the aMCI group, providing a semantic cue resulted in an increased production of Semantically Related intrusions. Unrelated intrusions occurred rarely, although, a small number occurred even in the CN group, warranting further investigation. Amyloid load correlated with all intrusion errors.

2018

Degree granted: Thesis (M.A.) – Florida Atlantic University, 2018.

Collection: FAU

Summary: The ability of adult wild Atlantic spotted dolphins (Stenella frontalis) to synchronize vocalizations and behaviors has been found to be a key factor in overcoming much larger bottlenose dolphins during interspecies aggression (Cusick & Herzing, 2014). Furthermore, an adult baseline of behaviors and vocalizations during aggressive events containing synchrony has been established (Myers, Herzing, & Bjorklund, 2017). The present study examines juvenile aggression that contains bouts of synchrony to look at the development of this valuable skill. Differences of duration between adult and juvenile synchronous bouts, lag sequential analyses, frequencies of behavioral classes depending on the age class of the aggressor-recipient dynamic, differences in the frequencies of behavioral classes depending on the synchronous state and aggressorrecipient dynamic, and differences in behavioral classes exhibited by adults and juveniles during different synchronous states were analyzed. Adults, across group size, were able to maintain physical synchrony for a longer duration. Juveniles were often in loose synchronous groups before forming into a tight synchronous group as seen in adult synchrony. Vocal synchrony during adult aggression in terms of synchronized squawks were longer in duration than vocal synchrony during juvenile aggression. Juveniles used more pursuit behaviors during aggression, which indicates practice of a behavior that was found to be the most frequently used in interspecies aggression (Volker, 2016). Additionally, when adults were present in juvenile aggression, they used fewer aggressive behavioral classes demonstrating self-handicapping based on their opponent. This illustrates that there is a learning period for both vocal and physical synchrony for juvenile dolphins and that juvenile aggression, or play-fighting, is an important aspect of the development of these skills. This study is the first to describe juvenile synchrony in a population of wild Atlantic spotted dolphins.

2018

Degree granted: Dissertation (Ph.D.) – Florida Atlantic University, 2018.

Collection: FAU