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	メンタルタフネス質問票（MTQ48）	Sport Confidence Inventory (SCI)
分野	スポーツ心理学	スポーツ心理学
系統	Process / pipeline	Process / pipeline
提唱年	2002	1986
提唱者	Peter Clough, Keith Earle, David Sewell	Robin Vealey
種類	Self-report mental toughness and resilience questionnaire	Self-report sport-specific confidence trait questionnaire
原典	Clough, P. J., Earle, K., & Sewell, D. (2002). Mental toughness: A definition and measured construct. Journal of Applied Sport Psychology, 14(3), 169–187.	Vealey, R. S. (1986). Conceptualization of sport-confidence and competitive orientation: Preliminary investigation and instrument development. Journal of Sport Psychology, 8(3), 221–246.
別名	MTQ48, Mental Toughness, 4Cs	SCI, Trait Sport Confidence
関連	4	4
概要	The MTQ48 is a 48-item instrument measuring mental toughness—the capacity to perform well under pressure, persist through adversity, maintain emotional control, and sustain commitment toward goals. Developed by Clough, Earle, and Sewell in 2002, the MTQ48 operationalizes mental toughness across four dimensions (the '4Cs': Control, Commitment, Challenge, and Confidence) and has become widely adopted in sport psychology, talent development, and organizational psychology for identifying and developing psychological resilience.	The SCI is a 13-item questionnaire measuring general, trait-level confidence in sport ability—the athlete's habitual belief in their capability to execute skills and perform well in their sport. Developed by Vealey in 1986, the SCI is one of the most widely used instruments for assessing athlete self-confidence and predicting competitive success and psychological wellbeing.