Hikikomori Risk Inventory (HRI-24): A new instrument for evaluating Hikikomori in both Eastern and Western countries.

BACKGROUND: Hikikomori, a clinical condition widely studied in Japan, is receiving increasing attention in Western Countries. AIMS: This study aimed to create a new instrument for evaluating the risk of Hikikomori in both Eastern and Western countries. METHODS: Through two studies on Italian adolescents, youths, and adults (n = 1,285) and a study on Japanese youths and adults (n = 392), we analyzed the psychometric properties of the Hikikomori Risk Inventory (HRI-24). RESULTS: We found support, in both the Italian and Japanese samples, for the good and stable factor structure of the scale (CFI = 0.94, RMSEA = 0.057 for both the adult samples), as well as for its convergent and divergent validity. CONCLUSIONS: The HRI-24 might be used in future studies in both Western and Eastern countries to shed light on the features of this clinical disorder in different cultures. This will allow the development of culture-sensitive preventive and clinical interventions.

Temporal distancing during the COVID-19 pandemic: Letter writing with future self can mitigate negative affect.

Novel coronavirus disease (COVID-19) is spreading across the world, threatening not only physical health but also psychological well-being. We reasoned that a broadened temporal perspective may attenuate current mental distress and tested a letter-writing manipulation designed to connect people to their post-COVID-19 future selves. We conducted an online experiment with 738 Japanese participants recruited from two common survey platforms. They were randomly assigned to either send a letter to their future self (letter-to-future) condition, send a letter to present self from the perspective of future self (letter-from-future) condition, or a control condition. Participants in both letter-writing conditions showed immediate decrease in negative affect and increase in positive affect relative to the control condition. These effects were mediated by temporal distancing from the current situation. These findings suggest that taking a broader temporal perspective can be achieved by letter writing with a future self and may offer an effective means of regulating negative affect in a stressful present time such as the COVID-19 pandemic.