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This self-report instrument is used to assess features of prolonged social withdrawal and associated functional impact. The Hikikomori Questionnaire (HQ-25) provides a structured way to quantify the severity of withdrawal-related experiences and the extent to which they interfere with daily life.
Developed by Alan R. Teo and Tamaki Saito, it includes 25 items and typically takes about 5 minutes to complete. The Hikikomori Questionnaire (HQ-25) may be used in clinical screening or research contexts as an adjunct to interview-based assessment, helping to identify individuals who may be experiencing clinically significant social isolation and related distress or impairment.