Neural correlates of semantic typicality during episodic memory retrieval in autism spectrum disorder.

Researchers used brain monitoring to study how autistic and non-autistic men remember things. Both groups performed equally well on memory tasks, but their brains worked differently. Non-autistic people relied more on quick familiarity feelings, while autistic people used deeper recollection processes. This suggests autistic people may use different but equally effective strategies to remember information.

This ERP study compared memory retrieval processes between autistic and neurotypical male adults, examining how item typicality and encoding type affect neural patterns during episodic memory tasks. While both groups achieved similar overall memory performance, they relied on different underlying cognitive processes. Neurotypical adults showed early ERP effects indicating familiarity-driven memory processes, whereas autistic adults demonstrated later ERP modulations suggesting reliance on recollection-based processes. The study also found that item typicality interacted with encoding type to influence memory retrieval processes in both groups, highlighting the importance of semantic processing in episodic memory.

Results suggest autistic individuals may use effective alternative cognitive strategies for memory tasks. Assessments should consider different processing styles rather than assuming deficits. Interventions could build on recollection-based strengths while accommodating different neural timing patterns in autistic individuals.

Sample size not reported, limiting generalizability. Male-only participants restrict findings to one gender. Single study design without replication. Unclear methodological details about ERP protocols and statistical analyses in the abstract.

This study examined the effects of item typicality (typical vs. atypical), encoding type (categorical vs. perceptual), and neurodivergence (autistic vs. neurotypical male adults) on memory discrimination and associated neuronal patterns. Despite similar overall memory discrimination performance between groups, analyses of event-related potentials revealed that neurotypicals displayed an early ERP effect, suggesting reliance on familiarity-driven processes. In contrast, autistic participants showed a later ERP modulation, indicating a reliance on recollection-based processes. Notably, relying on either familiarity or recollection influenced the activation in the post-old/new-response period, in which only neurotypical adults needed to reinstate item details for the subsequent Remember-Know-Guess (R-K-G) judgments.

These findings suggest that autistic adults may recruit different cognitive processes to achieve memory performance comparable to neurotypical adults. Additionally, our results suggest that item typicality interacts with encoding type in modulating the cognitive processes underlying memory retrieval and their neural correlates in both autistic and neurotypical adults. The study highlights the need to investigate the role of semantic processes in episodic memory retrieval in both neurotypical and autistic individuals.