Measures mental toughness across the 4Cs model: Control (sense of control over life and emotions), Commitment (goal-setting, keeping promises), Challenge (viewing problems as opportunities), and Confidence (belief in one's abilities). Mental toughness predicts performance under pressure, resilience, and wellbeing across sport and occupational contexts.
Clough, P., Earle, K., & Sewell, D. (2002). Mental toughness: The concept and its measurement. In I. Cockerill (Ed.), Solutions in sport psychology (pp. 32–43). Thomson Learning.
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