Facing up to the issues: reply to Hellige (1983)

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Behavior

Background:

• The chimeric-face technique is used to study visual field biases in face perception.
• Hellige critiqued the technique's validity, attributing left visual field (LVF) bias to feature disparities rather than right hemisphere dominance.
• This study rebuts that claim, asserting feature differences do not fully explain observed handedness effects.

Purpose of the Study:

• To re-evaluate the chimeric-face technique's validity for assessing hand preference.
• To investigate the influence of handedness and other variables on LVF bias in face perception.
• To propose an explanation for LVF bias variations observed with corrected chimeric faces.

Main Methods:

• Analysis of data from the chimeric-face technique, including corrected mirror-image faces.
• Comparison of results between left-handers and right-handers.
• Examination of potential confounding variables affecting visual field biases.

Main Results:

• While acknowledging feature differences in chimeric faces, the study argues this doesn't negate handedness effects.
• Further data presented support the role of handedness in influencing LVF bias.
• A hypothesis is proposed for the reduced LVF bias observed with true mirror-image stimuli.

Conclusions:

• The chimeric-face technique's interpretation requires careful consideration of handedness and stimulus properties.
• Observed LVF biases are likely influenced by a complex interplay of factors, including handedness.
• Further research is needed to fully elucidate the mechanisms underlying visual field biases in face perception.