Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Factor structure of the PAS-ADD Checklist with adults with intellectual disabilities
AU - Hatton, Chris
AU - Taylor, John L.
PY - 2008
Y1 - 2008
N2 - Background The PAS-ADD Checklist is designed to screen for likely mental health problems in people with intellectual disabilities (ID). The specificity of recommended subscales derived from diagnostic criteria is unclear. This paper therefore investigates the factor structure of the PAS-ADD Checklist to determine the adequacy of empirically derived subscales. Method A total of 1,115 informants who had known service users for a median of 24 months completed the PAS-ADD Checklist on 1,155 adults with ID living either in the community, in residential care, or in hospital settings in a county in North-East England. Results The sample was randomly divided into two, with all item scores dichotomised. An exploratory principal components factor analysis with varimax rotation was conducted on Subsample A, producing an optimal 7-factor solution. However, a confirmatory factor analysis using this factor structure for Subsample B revealed a mediocre to poor fit. Further exploratory and confirmatory factor analyses also indicated that empirically derived PAS-ADD Checklist subscales were inconsistent. Conclusion Given the inconsistency of empirically derived subscales, we do not recommend using the PAS-ADD Checklist to identify specific types of psychopathology. The Checklist may have more utility as a screening tool for general psychopathology and subsequent referral for more detailed assessment.
AB - Background The PAS-ADD Checklist is designed to screen for likely mental health problems in people with intellectual disabilities (ID). The specificity of recommended subscales derived from diagnostic criteria is unclear. This paper therefore investigates the factor structure of the PAS-ADD Checklist to determine the adequacy of empirically derived subscales. Method A total of 1,115 informants who had known service users for a median of 24 months completed the PAS-ADD Checklist on 1,155 adults with ID living either in the community, in residential care, or in hospital settings in a county in North-East England. Results The sample was randomly divided into two, with all item scores dichotomised. An exploratory principal components factor analysis with varimax rotation was conducted on Subsample A, producing an optimal 7-factor solution. However, a confirmatory factor analysis using this factor structure for Subsample B revealed a mediocre to poor fit. Further exploratory and confirmatory factor analyses also indicated that empirically derived PAS-ADD Checklist subscales were inconsistent. Conclusion Given the inconsistency of empirically derived subscales, we do not recommend using the PAS-ADD Checklist to identify specific types of psychopathology. The Checklist may have more utility as a screening tool for general psychopathology and subsequent referral for more detailed assessment.
KW - factor analysis
KW - intellectual disabilities
KW - PAS-ADD Checklist
KW - psychiatric disorders
KW - mental health
KW - adults
KW - BRIEF SYMPTOM INVENTORY
KW - PSYCHIATRIC-SYMPTOMS
KW - LEARNING-DISABILITY
KW - MENTAL-RETARDATION
KW - PSYCHOLOGICAL DISTRESS
KW - CHALLENGING BEHAVIOR
KW - PREVALENCE
KW - DISORDERS
KW - VALIDITY
KW - PEOPLE
U2 - 10.1080/13668250802441656
DO - 10.1080/13668250802441656
M3 - Journal article
VL - 33
SP - 330
EP - 336
JO - Journal of Intellectual and Developmental Disability
JF - Journal of Intellectual and Developmental Disability
SN - 1366-8250
IS - 4
ER -