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Meta-Analysis
. 2018 Feb;22(2):99-117.
doi: 10.1177/1362361316668652. Epub 2016 Nov 30.

Figurative language comprehension in individuals with autism spectrum disorder: A meta-analytic review

Tamar Kalandadze  1 , Courtenay Norbury  2 , Terje Nærland  3 , Kari-Anne B Næss  1
Affiliations
Meta-Analysis

Figurative language comprehension in individuals with autism spectrum disorder: A meta-analytic review

Tamar Kalandadze et al. Autism. 2018 Feb.

Abstract

We present a meta-analysis of studies that compare figurative language comprehension in individuals with autism spectrum disorder and in typically developing controls who were matched based on chronological age or/and language ability. A total of 41 studies and 45 independent effect sizes were included based on predetermined inclusion criteria. Group matching strategy, age, types of figurative language, and cross-linguistic differences were examined as predictors that might explain heterogeneity in effect sizes. Overall, individuals with autism spectrum disorder showed poorer comprehension of figurative language than their typically developing peers (Hedges' g = -0.57). A meta-regression analysis showed that group matching strategy and types of figurative language were significantly related to differences in effect sizes, whereas chronological age and cross-linguistic differences were not. Differences between the autism spectrum disorder and typically developing groups were small and nonsignificant when the groups were matched based on the language ability. Metaphors were more difficult to comprehend for individuals with autism spectrum disorder compared with typically developing controls than were irony and sarcasm. Our findings highlight the critical role of core language skills in figurative language comprehension. Interventions and educational programmes designed to improve social communication skills in individuals with autism spectrum disorder may beneficially target core language skills in addition to social skills.

Keywords: autism spectrum disorder; figurative language; meta-analysis; metaphor.

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Figures

Figure 1.
Figure 1.
Flow diagram for the search and inclusion of studies.
Figure 2.
Figure 2.
Overall mean effect size for group differences in figurative language comprehension comparing individuals with ASD and TD controls (Hedges’ g, displayed by ♦) and effect sizes with confidence intervals for each study represented by horizontal lines.
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