Left-ear-driven representational pseudoneglect for mentally represented real-word scenes created from aural-verbal...

Area of Science:

• Cognitive Neuroscience
• Auditory Perception
• Spatial Cognition

Background:

• Pseudoneglect describes a bias towards the left side of space in healthy individuals.
• Investigating spatial representation without visual input is crucial for understanding brain function.
• Aural-verbal descriptions offer a unique pathway to explore mental scene construction.

Purpose of the Study:

• To explore representational pseudoneglect using imagined real-world scenes from auditory information.
• To determine if monaural auditory presentation influences spatial biases in imagined scenes.
• To assess the impact of right hemisphere activation on spatial judgments and recall.

Main Methods:

• Healthy participants imagined real-world scenes described aurally.
• Stimuli were presented binaurally or monaurally (left or right ear).
• Tasks included relative landmark judgment and recall of left vs. right-sided elements.

Main Results:

• Left-ear (right hemisphere dominant) auditory input induced representational pseudoneglect in the relative judgment task.
• This bias did not enhance recall of left-sided landmarks.
• Binaural or right-ear (left hemisphere dominant) input showed no evidence of pseudoneglect.

Conclusions:

• Monaural left-ear stimulation can induce spatial biases in imagined scenes, suggesting right hemisphere involvement.
• Auditory-based spatial tasks may provide novel insights into representational pseudoneglect.
• Future research can leverage auditory paradigms to probe hemispheric contributions to spatial cognition.