Slow but Steady: Similarities and Differences in Executive Functioning Between Autistic and Non-Autistic Adults

Area of Science:

• Neurodevelopmental disorders
• Cognitive psychology

Background:

• Executive function (EF) differences between autistic and non-autistic individuals are well-documented but findings are mixed.
• Previous research has not consistently accounted for factors like sample size, specific EF components, age, and IQ.

Purpose of the Study:

• To investigate executive function (EF) differences in a large sample of autistic and non-autistic adults.
• To examine the influence of age, gender, and IQ on these EF differences.
• To explore performance patterns over time.

Main Methods:

• Recruited over 900 autistic and non-autistic participants (aged 18-77, average/above-average IQ).
• Administered tasks measuring inhibition, cognitive flexibility, working memory, and attentional orienting.
• Analyzed performance based on group, age, gender, and IQ.

Main Results:

• Overall EF performance was similar between groups.
• Autistic participants were slower, more affected by spatial cues, and made more working memory errors.
• Age, gender, and IQ did not significantly influence group differences in EF.

Conclusions:

• Autism does not necessarily imply basic cognitive-level executive dysfunction.
• Observed EF differences are not consistently explained by age, gender, or IQ in this sample.
• Discrepancies in the literature may stem from factors not examined here.