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Rachel Holden Chapter V .pdf (956.96 KB)

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Psychometric Properties of the Adaptive Behavior Assessment System- Second Edition with Adults Diagnosed with Intellectual Disability

Holden, Rachel
http://rave.ohiolink.edu/etdc/view?acc_num=xavier1461253948

Abstract Details

2016, Doctor of Psychology (Psy.D.), Xavier University, Psychology.
The shift in emphasis on adaptive functioning when specifying severity level of Intellectual Disability (ID), as stated in the DSM-5 (APA, 2013), increases the need for reliable and valid adaptive functioning measures for clinicians to utilize during diagnostic evaluations. This study investigated the psychometric properties of a widely-used adaptive functioning measure, the Adaptive Behavior Assessment System- Second Edition, with adults (ABAS-II; Harrison & Oakland, 2003). Participants included 102 adults with ID, ages 18 to 79 years, who resided at a Midwestern developmental center. Test-retest and inter-rater reliability were demonstrated for the ABAS-II General Adaptive Composite (GAC) and domain scores. Additionally, concurrent validity was also demonstrated with the Vineland Adaptive Behavior System- Second Edition (VABS-II) by statistically significant correlations for GAC and domain scores, as well as with the Wechsler Adult Intelligence Scale- Fourth Edition (WAIS-IV) and the Stanford Binet- Fifth Edition (SB-V) IQ scores. Past research indicates that comorbid psychiatric disorders and behavior/emotional symptoms impact the adaptive functioning of individuals with ID differently (Di Nuovo & Buono, 2007; Lopata et al., 2012). Therefore, it seemed likely that individuals displaying behavior or emotional problems/symptoms would weaken the reliability of an informant-rated instrument. Although the ABAS-II test-retest reliability coefficients were not significantly different between two groups (individuals who scored above and below the clinical threshold for comorbid behavioral/emotional problems), inter-rater reliability coefficients for the GAC and Practical domain scores were. These findings can be cautiously extended to the recently published ABAS-3 (Harrison & Oakland, 2015) as there is significant overlap between these two editions.
W. Michael Nelson, Ph.D. (Committee Chair)
Behavioral Psychology; Behavioral Sciences; Clinical Psychology; Psychological Tests; Psychology
intellectual disability; adaptive functioning; adults; Adaptive Behavior Assessment System; psychometric properties; behavioral problems

Recommended Citations

Citations

  • Holden, R. (2016). Psychometric Properties of the Adaptive Behavior Assessment System- Second Edition with Adults Diagnosed with Intellectual Disability [Doctoral dissertation, Xavier University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=xavier1461253948

    APA Style (7th edition)

  • Holden, Rachel. Psychometric Properties of the Adaptive Behavior Assessment System- Second Edition with Adults Diagnosed with Intellectual Disability. 2016. Xavier University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=xavier1461253948.

    MLA Style (8th edition)

  • Holden, Rachel. "Psychometric Properties of the Adaptive Behavior Assessment System- Second Edition with Adults Diagnosed with Intellectual Disability." Doctoral dissertation, Xavier University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=xavier1461253948

    Chicago Manual of Style (17th edition)

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© 2016, all rights reserved.
This open access ETD is published by Xavier University Psychology and OhioLINK.