The Benefit Finding Questionnaire (BFQ): Scale Development, Validation, and Its Psychometric Properties Among People with Mental Illness.

Benefit finding has been defined as positive life changes that result from a stressful event, such as the diagnosis of chronic illness. The present study aimed to develop a benefit finding questionnaire (BFQ) and examine its psychometric property among people with chronic mental illness in Japan. This study adopted a mixed method composed of three phases, including Phase 1: To draft the item pool and design the BFQ based on literature review and discussion among the authors, Phase 2: To revise and refine the drafted items through feedback from focus group interviews and further consideration, and Phase 3: To examine the psychometric properties of the BFQ following the questionnaire survey for people with chronic mental illness and validation of the questionnaire. In Phase 3, a cross-sectional, self-administered questionnaire survey was conducted for mental health service users. Among the 373 eligible participants, we used data from 265 respondents for the analyses (valid response rate = 71.0%). About 65% were male, and the average age was 45.3 years (SD = 12.9). Around 70% were diagnosed with schizophrenia. Factorial, concurrent, and divergent validities, as well as reliability were explored. The 21-item BFQ demonstrated good factorial validity, concurrent and divergent validities, and sufficient internal consistency reliability among people with chronic mental illness. It appears to be a useful scale to assess experience of benefit finding among people with chronic mental illness. Further large-scale research will ensure verification of the scale among people with other illnesses or difficulties.