Cognitive flexibility in autism: Evidence from young autistic children

Area of Science:

• Neuroscience
• Developmental Psychology
• Child Psychiatry

Background:

• Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by social communication deficits and restricted, repetitive behaviors.
• Cognitive flexibility, the ability to adapt thinking and behavior to changing circumstances, is often impaired in individuals with ASD.
• Understanding cognitive flexibility in young autistic children is crucial for targeted interventions.

Purpose of the Study:

• To investigate and compare cognitive flexibility performance between young autistic children and age-matched neurotypical peers.
• To examine performance on a nonverbal task (Children's Color Trails Test) and verbal fluency tasks (semantic and phonemic).
• To differentiate the impact of task modality and linguistic properties on cognitive flexibility in autism.

Main Methods:

• A cohort of 36 autistic children (72-83 months) and 200 typically developing children were assessed.
• Participants completed the Children's Color Trails Test (CCTT) to measure nonverbal cognitive flexibility.
• Verbal fluency was assessed using semantic and phonemic tasks to evaluate word generation abilities.

Main Results:

• Autistic children demonstrated significantly poorer performance on the switching component of the CCTT compared to neurotypical peers.
• While autistic children generated fewer words overall in fluency tasks, this deficit was specific to certain linguistic stimuli.
• Performance differences in verbal fluency were attributed to the inherent language properties of the tasks, not a general cognitive flexibility issue.

Conclusions:

• Cognitive flexibility in young autistic children appears specifically affected in nonverbal tasks like the CCTT.
• Impaired performance in semantic and phonemic fluency tasks among autistic children may stem from linguistic characteristics of the stimuli.
• These findings highlight the nuanced nature of cognitive flexibility deficits in autism, differentiating between nonverbal and verbal domains.