Assessment & Research

The acquisition of contextual cueing effects by persons with and without intellectual disability.

Merrill et al. (2014) · Research in developmental disabilities 2014
★ The Verdict

Implicit visual learning is preserved in intellectual disability—use consistent visual layouts to support instruction.

✓ Read this if BCBAs teaching daily living or vocational skills to adults or teens with ID.
✗ Skip if Clinicians focused only on severe motor impairments or ASD-specific programs.

01Research in Context

01

What this study did

The team asked the adults with intellectual disability and 24 typical adults to find a hidden letter on a computer screen.

The screen showed 12 random items. In half the trials the target letter always sat in the same spots.

Everyone did 360 trials while the computer tracked speed and accuracy.

02

What they found

Both groups got faster when the letter stayed in the same places.

The size of this speed boost, called contextual cueing, was the same for each group.

Implicit visual learning is intact in intellectual disability.

03

How this fits with other research

Lin et al. (2009) seems to disagree. Their pupils with ID clicked a mouse more slowly and less accurately than peers.

The tasks differ. Yun-Lung tested hand-eye coordination; C et al. tested pure visual memory. Poor cursor skill does not mean poor visual learning.

Wachob et al. (2015) also looks opposite. They saw no visual learning boost in autism. The key is diagnosis. David studied ASD; C et al. studied ID. Different brains, different results.

Barton et al. (2019) extend the story. They added an ASD group and showed comparison hints help ID kids but not ASD kids. Together the papers map which visual skills stay strong in each condition.

04

Why it matters

Do not assume global learning deficits. You can use repeated visual layouts to teach new skills. Keep the screen set-up the same across sessions. The learner’s eyes will pick up the pattern even if their hands move slowly.

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Keep the icon grid on the tablet in the same spots every trial—let the visual context do part of the teaching.

02At a glance

Intervention
not applicable
Design
quasi experimental
Population
intellectual disability, neurotypical
Finding
null

03Original abstract

Two experiments were conducted to compare the acquisition of contextual cueing effects of adolescents and young adults with intellectual disabilities (ID) relative to typically developing children and young adults. Contextual cueing reflects an implicit, memory based attention guidance mechanism that results in faster search for target locations that have been previously experienced in a predictable context. In the study, participants located a target stimulus embedded in a context of numerous distracter stimuli. During a learning phase, the location of the target was predictable from the location of the distracters in the search displays. We then compared response times to locating predictable relative to unpredictable targets presented in a test phase. In Experiment 1, all of the distracters predicted the location of the target. In Experiment 2, half of the distracters predicted the location of the target while the other half varied randomly. The participants with ID exhibited significant contextual facilitation in both experiments, with the magnitude of facilitation being similar to that of the typically developing (TD) children and adults. We concluded that deficiencies in contextual cueing are not necessarily associated with low measured intelligence that results in a classification of ID.

Research in developmental disabilities, 2014 · doi:10.1016/j.ridd.2014.05.026