ArticleAmerican journal of speech-language pathology2026
Beyond Surface Performance: Analyzing Grammatical Production and Judgment Abilities in Boys With Fragile X Syndrome.
Article in American journal of speech-language pathology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeBoys with fragile X syndrome (FXS) have relative weakness in morphosyntax, specifically finiteness markers. However, most research has focused on grammatical production as compared to receptive grammatical judgment. Thus, the current study examined both grammatical production and judgment through pattern analysis and individual differences.
methodThirty-three boys with FXS aged 9-18 years completed the third-person singular,
resultsGrammatical production and grammatical judgment performance showed variability across participants, with mean scores below ceiling in both domains. Comparison of production and judgment revealed substantial heterogeneity. Specifically, over half of the participants demonstrated discrepant performance between the grammatical production and judgment domains, whereas the remaining participants showed consistent performance across both domains. Differences in grammatical profiles were not explained by chronological age or nonverbal cognitive ability.
conclusionsFindings revealed persistent difficulties in the grammatical production and judgment of finiteness marking (particularly
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