2020 年 31 巻 p. 79-90
Objectives: The purpose of the present study was to determine the measuring properties of items from the Diagnostic Interview Schedule for Children—Attention-deficit/hyperactivity disorder module (DISC-ADHD) across gender and four racial/ethnic groups from a US community sample of young adults.
Method: For the dimensionality investigation, responses to both attention-deficit (AD) and hyperactivity disorder (HD) items These responses were obtained from 226 subjects who were both inattentive and hyperactive/impulsive while in their childhood. were investigate using confirmatory factor analysis. Differential item functioning (DIF) by gender and race/ethnicity was investigated separately for the nine AD items from 389 subjects who were inattentive in their childhood and the ten HD items from 508 subjects who were hyperactive or impulsive.
Results: The 19 DISC-ADHD items were distinguished by subtype one corresponded to AD and another corresponded to HD. The DIF investigation revealed that two AD and three HD items functioned differently between genders, and two AD and six HD items functioned differently for one or two racial/ethnic groups (as compared to non-Hispanic Whites). However, the over-endorsement and under-endorsement of these DIF items might be offset, resulting in no remarkable differential functioning at the diagnosis level.
Conclusion: Both AD and HD defined by the DISC-ADHD appeared to be a unidimensional construct, which corresponded to the DSM-IV. The DISC diagnoses for AD and HD were not remarkably biased, although some item-level biases were observed by gender and race/ethnicity.