The Difficulty of Effectively Using Allocentric Prior Information in a Spatial Recall Task.

Area of Science:

• Cognitive Psychology
• Neuroscience
• Spatial Cognition

Background:

• Prior information, reflecting environmental statistical regularities, aids perception and memory recall.
• Effective use of prior information is established in egocentric (self-based) frames of reference.
• The efficacy of prior information in allocentric (world-based) frames remains largely unexplored.

Purpose of the Study:

• To investigate whether humans utilize prior statistical information when recalling target locations in an allocentric frame.
• To compare the use of priors in allocentric versus egocentric spatial tasks.

Main Methods:

• Forty-eight adults participated in a virtual environment experiment.
• Participants recalled target locations presented with one of four prior distributions.
• Target recall was assessed after a delay and a perspective change, using an allocentric frame.

Main Results:

• Searches for targets were biased towards environmental beacons.
• No evidence was found for participants exploiting the prior distributions of target locations.
• This contrasts with findings from simpler egocentric recall tasks.

Conclusions:

• Allocentric spatial reasoning may not adhere to normative Bayesian models.
• The cognitive complexity of allocentric tasks might inhibit the use of prior information.
• High biological costs associated with processing allocentric information could explain the lack of prior utilization.