About this project
The overall aim is to validate a self-report version of the Swedish IPPA. Specific research questions: Can the self-report version be understood and answered in the intended way? Does the self-report version of IPPA demonstrate validity, test-retest reliability and sensitivity to change? This will be investigated by that people will answer IPPA and subsequently be interviewed about their understanding, and by that people will answer IPPA on three occasions to analyze validity, reliability and sensitivity to change with statistical methods.