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ERIC Number: EJ1119016
Record Type: Journal
Publication Date: 2016-Oct
Pages: 8
Abstractor: As Provided
ISSN: ISSN-1092-4388
An Item Analysis of the French Version of the Test for Reception of Grammar among Children and Adolescents with Down Syndrome or Intellectual Disability of Undifferentiated Etiology
Facon, Bruno; Magis, David
Journal of Speech, Language, and Hearing Research, v59 n5 p1190-1197 Oct 2016
Purpose: An item analysis of Bishop's (1983) Test for Reception of Grammar (TROG) in its French version (F-TROG; Lecocq, 1996) was conducted to determine whether the difficulty of items is similar for participants with or without intellectual disability (ID). Method: In Study 1, responses to the 92 F-TROG items by 55 participants with Down syndrome (DS), 55 with ID of undifferentiated etiology (UND), and 55 typical children (TYP) matched on their F-TROG total score were compared using the transformed item difficulties method, a statistical approach designed to detect differential item functioning (DIF) between groups. In Study 2, an additional comparison involving 526 TYP participants and 526 participants with UND was conducted to increase the statistical power of the analysis. Results: The difficulty of items was highly similar whatever the sample size or clinical status of participants. Fewer than 3.5% of the items were flagged as showing DIF. Conclusions: Tests such as the TROG can be used with confidence in clinical practice as well as in research studies comparing participants with or without ID. Methods designed for investigating potential internal test bias--such as done here--should be more regularly employed in the developmental disability field to affirm the absence of DIF.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A