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You searched for subject:(crossed hands). Showing records 1 – 2 of 2 total matches.

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McMaster University

1. Unwalla, Kaian. The Influence of Hand Position on Prior Entry.

Degree: MSc, 2016, McMaster University

Attended information is perceived quicker than unattended information. This is known as prior entry. When making judgments on the temporal order of two successive stimuli, performance is influenced based on attention. We were interested in whether this same attentional shift would occur when we adopt a crossed hands posture. Typically when making these tactile temporal order judgments, performance declines when the hands are crossed. This may be due to a greater influence of the external environment in the crossed posture. We investigated this by providing an exogenous visual cue at one or both of the hands prior to making judgments about the temporal order of two successive vibrations. This was completed with the hands crossed and uncrossed. In Experiment 1 responses were to which stimulus occurred first. In Experiment 2 participants responded to which stimulus occurred second. Changing the response requirement did not influence overall performance. In both experiments we observed prior entry that was in the same direction for both crossed and uncrossed postures. The size of the prior entry effect was larger when the hands were crossed. We remap tactile information quickly to external coordinates, however we are less certain of the hand’s location.

Thesis

Master of Science (MSc)

Advisors/Committee Members: Shore, David I., Psychology.

Subjects/Keywords: Psychology; prior entry; multisensory perception; crossed-hands

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Unwalla, K. (2016). The Influence of Hand Position on Prior Entry. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/20774

Chicago Manual of Style (16th Edition):

Unwalla, Kaian. “The Influence of Hand Position on Prior Entry.” 2016. Masters Thesis, McMaster University. Accessed October 24, 2020. http://hdl.handle.net/11375/20774.

MLA Handbook (7th Edition):

Unwalla, Kaian. “The Influence of Hand Position on Prior Entry.” 2016. Web. 24 Oct 2020.

Vancouver:

Unwalla K. The Influence of Hand Position on Prior Entry. [Internet] [Masters thesis]. McMaster University; 2016. [cited 2020 Oct 24]. Available from: http://hdl.handle.net/11375/20774.

Council of Science Editors:

Unwalla K. The Influence of Hand Position on Prior Entry. [Masters Thesis]. McMaster University; 2016. Available from: http://hdl.handle.net/11375/20774


McMaster University

2. Cadieux, Michelle L. Crossing the midline: An exploration of reference frame conflict.

Degree: PhD, 2013, McMaster University

Multiple reference frames are used to interact with our surroundings. When these reference frames are in conflict, processing errors can occur. For tactile stimuli, this conflict is highlighted when the hands are crossed over the midline of the body. In this posture, vibrotactile temporal order judgments (TOJs) presented to the hands are impaired compared to an uncrossed posture. This decrease in temporal processing is known as the crossed-hands deficit. The deficit was explored in depth throughout this thesis. In Chapters 2, 3 and 4 different elements of the crossed-hands deficit were evaluated including its connections to the rod and frame test, individual and sex differences within the TOJ task, as well as the influence of vision and body position. These elements were framed with underlying goal of investigating the root cause of the deficit. The data presented here provided evidence for a conflict model of crossed hands processing. A conflict between the internal and external reference frames produced the deficit in temporal processing when the hands were crossed. The role of the body’s midline in understanding multisensory integration was further considered in Chapter 5 through the rubber hand illusion, which is a visuotactile phenomenon whereby an unseen real hand is mislocalized towards a seen rubber hand. When the real hand, rubber hand, or both were crossed over the midline the illusion did not occur. It was hypothesized that a failure to integrate the tactile information presented to the real hand with the visual rubber hand was responsible for the absence of the illusion. Taken together, the data presented in this thesis contribute to the greater understanding of how reference frame conflicts are resolved, particularly when the conflict occurs across the body’s midline.

Doctor of Philosophy (PhD)

Advisors/Committee Members: Shore, David I., Milliken, Bruce, Watter, Scott, Psychology.

Subjects/Keywords: reference frame; midline; crossed-hands; egocentric; allocentric; rubber hand illusion; temporal order judgments; vision; tactile; sex difference; Cognition and Perception; Cognition and Perception

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Cadieux, M. L. (2013). Crossing the midline: An exploration of reference frame conflict. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/13425

Chicago Manual of Style (16th Edition):

Cadieux, Michelle L. “Crossing the midline: An exploration of reference frame conflict.” 2013. Doctoral Dissertation, McMaster University. Accessed October 24, 2020. http://hdl.handle.net/11375/13425.

MLA Handbook (7th Edition):

Cadieux, Michelle L. “Crossing the midline: An exploration of reference frame conflict.” 2013. Web. 24 Oct 2020.

Vancouver:

Cadieux ML. Crossing the midline: An exploration of reference frame conflict. [Internet] [Doctoral dissertation]. McMaster University; 2013. [cited 2020 Oct 24]. Available from: http://hdl.handle.net/11375/13425.

Council of Science Editors:

Cadieux ML. Crossing the midline: An exploration of reference frame conflict. [Doctoral Dissertation]. McMaster University; 2013. Available from: http://hdl.handle.net/11375/13425

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