Principal component analysis study of visual and verbal metaphoric comprehension in children with autism and learning disabilities.
Autistic kids treat metaphors like learning-disabled peers, so teach familiarity first and cut clutter.
01Research in Context
What this study did
The team gave visual and verbal metaphor tasks to three groups: autistic children, children with learning disabilities, and typically developing peers.
They used principal component analysis (PCA) to see how each group naturally sorts the metaphors.
No teaching or intervention happened; they just wanted to map how the kids think.
What they found
Typical kids grouped metaphors by how familiar the phrases were, not by pictures versus words.
Kids with learning disabilities split visual and verbal metaphors into two clear piles.
Autistic kids copied the verbal pattern of the LD group and all clinical groups had trouble ignoring extra, unhelpful information.
How this fits with other research
Vakil et al. (2011) also found different thinking paths: typical kids build answers step-by-step while kids with ID eliminate choices one by one.
Witt et al. (2020) showed that when you match kids by mental age, not birthday, the gap in abstract tasks shrinks—same warning Nira et al. imply.
Boutros et al. (2011) saw no overall self-regulation difference between ID and TD groups once mental age was counted, echoing the need to control cognitive level before labeling a deficit.
Why it matters
When you teach figurative language, start with metaphors the child already hears at home or on TV, not the format.
If an autistic learner seems lost, check mental age first; the real blocker may be unfamiliar words, not autism itself.
Swap in new metaphors only after the familiar ones feel easy, and strip out extra pictures or text that could distract.
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02At a glance
03Original abstract
This research extends previous studies regarding the metaphoric competence of autistic and learning disable children on different measures of visual and verbal non-literal language comprehension, as well as cognitive abilities that include semantic knowledge, executive functions, similarities, and reading fluency. Thirty seven children with autism (ASD), 20 children with learning disabilities (LD), and 21 typically developed (TD) children participated in the study. Principal components analysis was used to examine the interrelationship among the various tests in each group. Results showed different patterns in the data according to group. In particular, the results revealed that there is no dichotomy between visual and verbal metaphors in TD children but rather metaphor are classified according to their familiarity level. In the LD group visual metaphors were classified independently of the verbal metaphors. Verbal metaphoric understanding in the ASD group resembled the LD group. In addition, our results revealed the relative weakness of the ASD and LD children in suppressing irrelevant information.
Research in developmental disabilities, 2012 · doi:10.1016/j.ridd.2011.09.010