Short-Term Visual Deprivation, Tactile Acuity, and Haptic Solid Shape Discrimination

<p>The visual cortex of human observers changes its functionality in response to visual deprivation (Boroojerdi et al., 2000). Behavioral studies have recently documented enhanced tactile abilities following a short period of visual deprivation (Facchini & Aglioti, 2003; Weisser, Stilla, Peltier, Hu, & Sathian, 2005). The current study investigated the effects of visual deprivation on two unique tactile tasks. While Facchini and Aglioti observed significant effects of visual deprivation, neither Wong, Hackeman, Hurd, and Goldreich (2011) nor Merabet et al. (2008) observed these effects. Corroborating these more recent results, no difference in grating orientation discrimination performance was observed between the sighted and visually deprived participants in the first experiment. A significant effect of experience was seen in both groups, however, irrespective of the deprivation period of 90 minutes. The second experiment immediately followed the conclusion of the first experiment. Using the same stimuli and procedures from past experiments (Norman, Clayton, Norman, & Crabtree, 2008), it investigated the participants’ haptic discrimination of 3-dimensional object shape. Again, no significant difference in performance was found between the sighted and visually deprived participants. Together, the current results show that a brief period of visual deprivation (1.5 hours) produces no significant behavioral changes for these tactile and haptic tasks.</p>

Name thesis:degree_name

Master of Arts

Discipline thesis:degree_discipline

Department of Psychology

Year

2014

Author dc:creator

• Crabtree, Charles E.

Contributors dc:contributor

• J. Farley Norman (Director), Pitt Derryberry, Lance W. Hahn

• Perception
• Touch
• Blindness
• Form
• Psychophysics
• Cognitive Psychology
• Cognition and Perception
• Psychology

Repository record dc:identifier

https://digitalcommons.wku.edu/theses/1387

OAI identifier oai:identifier

oai:digitalcommons.wku.edu:theses-2390