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Memory for spatial location in retarded and nonretarded persons.

E R Katz¹, N R Ellis

¹Department of Psychology, University of Alabama, Tuscaloosa.

Journal of Mental Deficiency Research

|June 1, 1991

Summary

Intellectual disability impacts memory differently. While mild intellectual disability affects item recall, moderate intellectual disability impairs both item and spatial location memory.

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Area of Science:

Cognitive Psychology
Neuroscience
Developmental Psychology

Background:

Memory is crucial for daily functioning and is often impaired in individuals with intellectual disabilities.
Distinguishing between item memory (effortful processing) and location memory (automatic processing) is key to understanding cognitive deficits.

Purpose of the Study:

To investigate item memory and spatial location memory in individuals with varying intellectual abilities.
To examine the influence of encoding instructions and time on memory recall in college students and individuals with mild and moderate intellectual disabilities.

Main Methods:

Participants (college students, mildly, and moderately intellectually disabled individuals) were given semantic or nonsemantic encoding tasks.
Picture recall and unexpected relocation tests were administered immediately and 24 hours after encoding.

Main Results:

Mildly intellectually disabled individuals showed deficits in item memory but not location memory.
Moderately intellectually disabled individuals exhibited deficits in both item and location memory.
Location memory was sensitive to encoding instructions and long-term forgetting but less affected by intelligence differences compared to item memory.

Conclusions:

Intellectual disability differentially affects item and location memory, with more severe impairments seen in moderate intellectual disability.
Location memory appears to rely more on automatic processing, making it less susceptible to intellectual deficits but more prone to forgetting over time.

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