Developmental trajectory of pseudoneglect in adults using the greyscales task

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Development

Background:

• Neurologically healthy adults typically show a slight leftward spatial bias.
• Previous research indicated this bias might decrease or reverse in older adults (over 60).
• Existing methods like line bisection may not reliably capture age-related changes in spatial attention.

Purpose of the Study:

• To investigate the developmental trajectory of perceptual biases across the adult lifespan.
• To examine how spatial attention, specifically the leftward bias, changes from young adulthood to old age.
• To utilize the greyscales task for a more robust assessment of age-related spatial biases.

Main Methods:

• Employed the greyscales task with 492 participants aged 18 to 88.
• Participants viewed asymmetrical equiluminant gradient pairs, assessing leftward/rightward bias.
• Analyzed the correlation between age and the strength of the leftward response bias.

Main Results:

• A significant negative correlation was found between age and leftward response bias (r = -.154, p < .001).
• The oldest age group (80-89) showed a significantly stronger leftward bias than the youngest (18-29).
• Findings contradict previous studies suggesting a reduced bias in older adults.

Conclusions:

• Spatial attention biases demonstrate developmental changes across the adult lifespan.
• The study suggests an increase, not a decrease, in leftward spatial bias with advanced age.
• Further research is necessary to confirm the reliability of these age-related shifts in spatial attention allocation.