Autism & Developmental

Formal Thought Disorder and Executive Functioning in Children and Adolescents with Autism Spectrum Disorder: Old Leads and New Avenues.

Ziermans et al. (2017) · Journal of autism and developmental disorders 2017
★ The Verdict

Low verbal working memory shows up as jumbled speech in high-functioning autism—check it when language sounds odd.

✓ Read this if BCBAs working with fluent but disorganized speakers in clinic or school.
✗ Skip if Clinicians serving non-verbal or preschool populations.

01Research in Context

01

What this study did

The team tested 30 high-functioning kids and teens with autism. They matched them by age and IQ to 30 typical kids.

Each child did short memory and planning games. Parents also filled out a checklist about odd speech patterns.

Doctors scored the speech for formal thought disorder—sentences that jump topics or make little sense.

02

What they found

Autistic youth used twice as much jumbled speech as peers. Lower verbal working memory scores went hand-in-hand with stranger language.

IQ and age did not explain the link. Only the ability to hold words in mind predicted how disorganized the speech sounded.

03

How this fits with other research

Whitehouse et al. (2014) saw the same group struggle with verbal problem-solving. Both studies point to inner speech as the weak spot, not wide executive collapse.

Austin et al. (2015) showed adaptive skills slip as executive scores drop. Tim et al. now add that language oddities are part of that slide.

Rong (2024) also found working memory hurting Mandarin-speaking autistic kids on simple “this/that” tasks. The pattern crosses languages and tasks.

04

Why it matters

When you hear loose, tangled talk, do a quick verbal working memory probe. Ask the client to repeat a short sentence backwards or remember three words while answering a question. If memory is low, break your own language into smaller chunks, use visual cues, and give extra wait time. Targeting working memory with rehearsal or chunking games may tidy up both language and daily living skills.

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Open session with a three-word memory game; note if errors predict tangled comments during conversation.

02At a glance

Intervention
not applicable
Design
quasi experimental
Sample size
106
Population
autism spectrum disorder
Finding
positive
Magnitude
medium

03Original abstract

Formal thought disorder (FTD) is a disruption in the flow of thought and a common feature in psychotic disorders and autism spectrum disorder (ASD). Executive dysfunction has often been associated with FTD, yet for ASD convincing evidence is lacking. This study investigated FTD and three core executive functions in 50 young children and adolescents with high-functioning ASD and 56 matched controls. Higher overall levels of FTD marked ASD compared to controls. Furthermore, in ASD decreased performance on verbal working memory was correlated with increased FTD ratings and explained a significant amount of variance of objective and subjective FTD. Verbal working memory is currently the most promising target executive function for understanding the development of idiosyncratic thought disorders in ASD.

Journal of autism and developmental disorders, 2017 · doi:10.3389/fpsyt.2013.00161