Seeing faces: The interocular transfer of the face gender aftereffect

Sleeman, Elle (2011). Seeing faces: The interocular transfer of the face gender aftereffect Honours Thesis, School of Psychology, The University of Queensland.

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Author Sleeman, Elle
Thesis Title Seeing faces: The interocular transfer of the face gender aftereffect
School, Centre or Institute School of Psychology
Institution The University of Queensland
Publication date 2011-10-12
Thesis type Honours Thesis
Supervisor Associate Professor Derek Arnold
Total pages 45
Language eng
Subjects 1701 Psychology
Abstract/Summary Prolonged exposure (adaptation) to a gender specific face (male or female) will bias the perception of consequently viewed faces, making them appear to be the opposite sex of the adaptor. This is known as the face gender aftereffect. It has already been established in the literature that interocular transfer (IOT) can be used to determine where specific aftereffects are processed in the visual hierarchy, due to the arrangement of monocular and binocular neurons. Binocular neurons (neurons that respond to visual information presented in either eye) increase as you progress through the visual hierarchy, with few binocular neurons in V1. It has previously been established that the tilt aftereffect has an IOT of approximately 40% (Clifford & Rhodes, 2005). To date, however, no one has directly tested the IOT of faces. This thesis aimed to remedy this by presenting 20 human participants, 14 females and 6 males, with images of faces varying in degrees of masculinity and femininity in experiment 1, to either their same eye as adaptation or different eye to adaptation through a mirror stereoscope. This aimed to illicit the face gender aftereffect, in both the adapted eye and unadapted eye. Experiment 2 aimed to replicate the IOT of the tilt aftereffect, in a similar fashion. It was hypothesised that the face gender after effect would have a complete IOT due to being processed higher up in the visual hierarchy and that the tilt aftereffect would have a partial IOT as found in previous research. Results of the study supported the hypotheses, in that the gender face aftereffect had an IOT of approximately 82% and the tilt aftereffect had an approximate IOT of 62%. Future research should be conducted to determine if other face aftereffects have a similar IOT to the gender face aftereffect and fMRI data should be utilised to support the findings of the current study.
Keyword Face gender aftereffect
Prolonged exposure and bias perception

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Created: Tue, 26 Jun 2012, 16:14:13 EST by Mrs Ann Lee on behalf of School of Psychology