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Published on: October 3, 2018
Transitive inference in adults with autism spectrum disorders
Marjorie Solomon1, Michael J Frank, Anne C Smith
1Department of Psychiatry & Behavioral Sciences, University of California, Davis, Sacramento, USA. marjorie.solomon@ucdmc.ucdavis.edu
Individuals with autism spectrum disorders (ASDs) show strong rote learning but struggle with generalization. This study used a transitive inference task to explore learning strategies in adults with ASDs compared to neurotypical individuals.
Area of Science:
- Cognitive Neuroscience
- Neurodevelopmental Disorders
Background:
- Autism Spectrum Disorders (ASDs) are characterized by intact rote learning but impaired generalization.
- Neuropathological findings suggest different learning strategy utilizations in ASDs.
Purpose of the Study:
- To investigate learning patterns in adults with ASDs using a transitive inference paradigm.
- To test the hypothesis that ASDs utilize a hippocampal-reliant strategy versus a prefrontal cortex-striatum reliant strategy.
Main Methods:
- A transitive inference paradigm with sequential stimulus pair training and novel pair testing.
- Comparison of learning strategies between 27 young adults with ASDs and 31 neurotypical individuals (TYPs).
Main Results:
- ASDs showed reduced interference from intervening pairs during early training.
- Only TYPs developed a serial position curve by the test phase.
- ASDs demonstrated impairments on novel end-item test pairs, while inner-pair performance was intact.
Conclusions:
- Findings largely support the hypothesis regarding differing learning strategies in ASDs.
- Individuals with ASDs may rely more on relational flexibility, while neurotypical individuals utilize associative strength.
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