Gambling and Gambling Problem Perception Questionnaire as a tool to evaluate professionals' attitudes towards problem gamblers and training programmes in Japan.

Aim: To develop and measure the psychometric properties of the Gambling and Gambling Problem Perception Questionnaire (GGPPQ); a scale to evaluate professionals' attitudes towards people with problem gambling in the Japanese context. Data collection: We held 12 workshops in Japan targeted at mental health professionals who consult people with gambling problems. Participants completed the survey before the workshop. Some were also asked to complete the survey after the workshop to measure workshop influence. Setting: Public and private healthcare facilities in all 47 prefectures of Japan. Participants: Medical doctors, nurses, social workers, clinical psychologists, and other professionals working in the aforementioned facilities (n = 653, response rate = 98.5%). Measurements: licence; knowledge about gambling and gambling problems (questionnaire); self-rating of knowledge and general confidence for helping problem gamblers; years of practice; frequency of working with clients; experience in attending workshops; overall satisfaction with the workshop. Results: A five-factor structure extracted by exploratory factor analysis showed a good fit by confirmatory factor analysis (CFI = .973, TLI = .967, RMSEA = .060, AIC = 28913.6, BIC = 29110.8). The GGPPQ showed good internal consistency and good concurrent validity with participants' self-rating of their knowledge, general confidence, frequency of working with clients who have gambling problems, and experience in attending workshops. The workshop had a positive influence on participants' attitudes. Japan's unique gambling industry and lack of training opportunities on problem gambling were assumed to have influenced the psychometric properties of the measurement tool. Conclusion: The GGPPQ is a valid tool to measure the attitudes of healthcare professionals towards people with gambling problems, as well as workshop effectiveness in Japan.