Psychometric properties of the Aberrant Behavior Checklist, the Anxiety, Depression and Mood Scale, the Assessment of Dual Diagnosis and the Social Performance Survey Schedule in adults with intellectual disabilities
Highlights
► We examined the psychometrics of the ABC, the ADD, the ADAMS, and the SPSS. ► Data were collected in two community groups of adults with mild to profound ID. ► Internal consistencies ranged from fair to excellent for the ABC, ADAMS, and SPSS. ► All instruments evidenced relatively solid convergent and discriminant validity. ► CFA did not suggest good fits, but most items loaded significantly on their factor.
Section snippets
Participants
A total of 263 (174 male, 89 female) individuals were assessed with these four measures. Of these, 24% had mild, 34.6% moderate, 23.3% severe, and 17.5% profound intellectual disability (two participant's level of functioning was unavailable). The gender distribution between the two study groups was not statistically different, however, the groups differed in terms of the distribution of ID levels (Pearson χ2[3] = 22.9, p < .000). Group 1 had a larger proportion of individuals with mild and
Results
Data were analysed using SPSS 17.0 for Windows and Lisrel 8.72.
Discussion
The data set of this study consisted of two groups of adults of all levels of ID who resided in the community. While Group 2 represented individuals who were served by training and rehabilitation program, Group 1 was a clinical sample receiving outpatient services. The difference between the type of groups was substantiated insofar as Group 2 had relatively higher mean scores on the two socially acceptable behavior subscales (SPSS Social Skills and Communication), while Group 1 had relatively
Acknowledgements
The authors wish to acknowledge the contributions of Dr. Michel Sherer in data collection, Dr. Theodore Hoch for his assistance in the initial development of the study protocol, and Camelia Mircea and Rebecca H. Zaja for data management during earlier periods of the study.
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2015, Research in Developmental DisabilitiesCitation Excerpt :Additionally, internal consistency using Cronbach's alpha (α = .88) was found for the total scale in a sample of 67 subjects. Regarding validity, Rojahn and colleagues (2011) established convergent validity between the socially undesirable subscales of the SPSS and the ABC (Aman & Singh, 1986) subscales and divergent validity between the socially desirable subscales of the SPSS and the ABC subscales. The PIMRA-II, ADD, and SPSS were administered by doctoral students in a clinical psychology Ph.D. program.