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Page 2

1. aBSI brief symptom inventory, CAI-S competition anxiety inventory state, TOQS thought occurrence questionnaire sport, TOPS test of performance strategies, FFMQ-SF five facets mindfulness questionnaire short form, AMQ athletic mindfulness questionnaire, SEC-27 self-assessment of emotional competencies, AAQ-II acceptance and action questionnaire, EQ experience questionnaire, DSS decentering scale for sport, ANT attention network test, TEOSQ task ego orientation sport questionnaire, RSC rosenbergs’s self-esteem scale, SCS self compassion scale
2. bT0 = Before randomization T1 = pre-intervention, T2 = post intervention, T3 = 2 months follow up