The "Tetris effect": autistic and non-autistic people share an implicit drive for perceptual cohesion.
Nazia Jassim, Brónagh McCoy, Esther Wing-Chi Yip and 3 others
PMID 40140977WHAT IT FOUND
Autistic and non-autistic adults show the same automatic drive to perceive disjointed shapes as cohesive wholes.
Both groups falsely identified fitting puzzle pieces as complete targets and responded faster to them. This perceptual cohesion is shared, not a deficit.
Key findings
01Participants made more false alarms to disjointed blocks that could fit together than to those that could not, confirming an implicit drive for perceptual cohesion.
02There was no difference between autistic and non-autistic groups in false alarm rates or discriminability indices, indicating shared perceptual processing of potential wholes.
03In a colour identification task, both groups responded faster when preceded by disjointed shapes that could form the target, with no interaction between diagnosis and condition.
STILL TO COME
How it was doneWhat they found
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What it does not show
The study was underpowered to detect very small group differences (Cohen's d < 0.3), though the authors argue such differences may not be clinically meaningful. The autistic sample was predominantly female (61%) and older (mean age 41), which may not represent younger or male-dominated autistic populations. Tasks may capture local-vs-global processing preferences rather than pure perceptual cohesion, though the authors argue the stimuli design minimises this. Phase 2 participants were recruited via Prolific (paid), introducing potential monetary incentive effects, although phase was controlled for in analysis.
Declared interests
Funded by Newnham College April Trust, Wellcome Trust, Autistica, ACE, IMI, SFARI, Templeton World Charitable Fund, NIHR Cambridge Biomedical Research Centre, and MRC. No specific conflicts of interest declared by authors.
The easy way to misread this
Do not interpret the faster overall reaction times in autistic participants during the colour task as evidence of superior perceptual processing or a diagnostic marker. The primary finding was null for group differences in the core 'Tetris effect' phenomenon, and the reaction time difference did not interact with the condition of interest.