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Title Audiovisual Prior Entry: Evidence from the Synchrony Comparison Judgment Task
Publication Date
Date Accessioned
University/Publisher University of Ottawa
Abstract Prior entry refers to the notion that attended stimuli are perceived sooner than unattended stimuli due to a speed up in sensory processing. The century long debate regarding the prior entry phenomenon’s existence has always been grounded in the degree to which the methods applied to the problem allow for cognitive response bias. This thesis continues that trend by applying the synchrony comparison judgment method to the problem of audiovisual prior entry. Experiment 1 put this method into context with two other common psychophysical methods – the temporal order judgment and the synchrony judgment – that have been applied to the prior entry problem. The results of this experiment indicated that the temporal order judgment method was out of step with the other two methods in terms of the parameter estimates typically used to evaluate prior entry. Experiment 2 evaluated and confirmed that a specific response bias helps explain the difference in parameter estimates between the temporal order judgment method and the other two. Experiment 3 evaluated the precision of the synchrony comparison judgment method. The results indicated that the method was precise enough to detect potentially small prior entry effect sizes, and that it afforded the ability to detect those participants with points of subjective synchrony that deviate substantially from zero. Finally, Experiment 4 applied the synchrony comparison judgment method to a prior entry scenario. A prior entry effect was not realized. Overall, this thesis highlights the drawbacks of all previous methods used to evaluate audiovisual perception, including prior entry, and validates the use of the synchrony comparison judgment. Further, due to the resistance of this method to response bias, this result now stands as the most convincing evidence yet against the prior entry phenomenon.
Subjects/Keywords prior entry; attention; temporal order judgment; synchrony comparison judgment; synchrony judgment; response bias
Language en
Country of Publication ca
Record ID handle:10393/23100
Repository ottawa
Date Indexed 2018-01-03
Issued Date 2012-01-01 00:00:00

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…alternative method that did not involve motion was needed to yield a more ideal investigation of the problem. The Temporal Order Judgment Method The temporal order judgment (TOJ) method was introduced to the problem of prior entry to avoid the…

…in which the observer makes a judgment concerning the order of two stimuli from different modalities (i.e., “visual stimulus first” or “auditory stimulus first”). Compared to the typical complication situation in which a temporal

…0 -180 The prior entry effect -120 -60 0 60 120 180 Stimulus Onset Asynchrony (ms) Figure 1. Both figures represent hypothetical data from a temporal order judgment task (TOJ). Figure 1A indicates the determination of the…

…investigators to continue to question the methods used to test the law. The Concurrent Temporal Order Judgment-Reaction Time Paradigm Although Stone’s (1926) study was seen as strong evidence in favour of the prior entry hypothesis due to the fact that…

…the methodology would be improved by using a strategy that provides validation that participants were following the instructions and focusing attention on one stimulus over the other. A temporal order judgment does not, in itself, provide any…

…example, Vanderhaeghen and Bertelson (1974) implemented a similar strategy of requiring participants to produce a RT prior to making a judgment about the order of two stimuli. However, in this study the reaction was a choice reaction. As in the…

…detection processing which may have an effect on a central temporal order decision mechanism. The authors note that while the occurrence of the attended signal inherently carries information regarding its time of occurrence, this occurrence further carries…

…execution of a motor program) resulting from the occurrence of the attended signal will be associated with only that signal and not the other, resulting in an unequal amount of post-detection processing, which may in turn affect a temporal order