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Psychometric Properties of the Adult Scale of Hostility and Aggression: Reactive/Proactive (A-SHARP) for Individuals with Intellectual Disabilities

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dc.contributor.advisor Rojahn, Johannes
dc.contributor.author Rick-Betancourt, Brittney
dc.creator Rick-Betancourt, Brittney
dc.date 2015-05-01
dc.date.accessioned 2015-08-19T12:48:33Z
dc.date.available 2015-08-19T12:48:33Z
dc.date.issued 2015-08-19
dc.identifier.uri https://hdl.handle.net/1920/9795
dc.description.abstract Background: The Adult Scale of Hostility and Aggression: Reactive/Proactive (A-SHARP; Matlock & Aman, 2011) was developed to assess aggressive problem behaviors common in adults with intellectual and developmental disabilities. The 52-item A-SHARP has five subscales (Verbal Aggression, Physical Aggression, Hostile Affect, Covert Aggression, and Bullying) and in addition provides a score on the degree of provocation of the exhibited aggression. Psychometric properties as reported by Matlock and Aman (2014) were very good, yet need to be corroborated. Method: In 2013, staff at a day treatment program for adults with intellectual disabilities completed ratings on the A-SHARP for all their clients (n=194) and the Behavior Problems Inventory-01 (BPI-01; Rojahn et al., 2001). The BPI-01 was also completed in 2008. The Behavior Problems Inventory-Short Form (BPI-S; Rojahn et al., 2012a) was completed in 2012. Results: Internal consistency was excellent for the A-SHARP Problem and Provocation scales (Cronbach α =.96 and .90), ranging from .76 to .93 for the five subscales. As for concurrent validity of the A-SHARP, subscale scores correlated with the 2013 BPI-01 Aggressive/Destructive Behavior frequency and severity ratings from .15 to .68 (Spearman ρ). Furthermore, regression analyses suggest that scores from the 2008 BPI-01 and the 2012 BPI-S predicted scores on the relevant A-SHARP scales. Conclusions: The A-SHARP was found to have acceptable to excellent internal consistency, while evidence for concurrent validity of select A-SHARP subscales was moderate. These findings and their implications for the assessment of aggressive behavior in adults with intellectual and developmental disabilities are discussed.
dc.language.iso en en_US
dc.subject intellectual disab* en_US
dc.subject aggressive behaviors en_US
dc.subject aggression en_US
dc.subject adults en_US
dc.subject maladaptive behaviors en_US
dc.title Psychometric Properties of the Adult Scale of Hostility and Aggression: Reactive/Proactive (A-SHARP) for Individuals with Intellectual Disabilities en_US
dc.type Thesis en
thesis.degree.name Master of Arts in Psychology en_US
thesis.degree.level Master's en
thesis.degree.discipline Psychology en
thesis.degree.grantor George Mason University en


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