Exploratory factor analysis and convergent validity of the Dundee Provocation Inventory

Area of Science:

• Psychology
• Intellectual Disability Research

Background:

• Anger and aggression are significant concerns in individuals with intellectual disability (ID).
• Effective assessment tools are crucial for treatment planning and outcome evaluation in ID populations.

Purpose of the Study:

• To evaluate the Dundee Provocation Inventory (DPI) as a measure for anger provocation in people with intellectual disability (ID).

Main Methods:

• 114 participants with ID were administered the DPI.
• 62 participants also completed the Novaco Anger Scale (NAS) and NAS Provocation Inventory (NAS-PI).
• Statistical analyses included correlation, internal consistency, and factor analysis.

Main Results:

• The DPI showed significant correlations with the NAS (r = .57) and NAS-PI (r = .77).
• The DPI demonstrated high internal consistency (alpha = .91) and strong item correlations.
• Factor analysis identified a 5-factor solution explaining 63% of the variance.

Conclusions:

• The Dundee Provocation Inventory (DPI) is a suitable instrument for assessing anger provocation in individuals with intellectual disability (ID).
• Further research to replicate the factor structure is recommended.