Measurement Characteristics of the Coach Trust Scale for Taekwondo Athletes: An Item Response Theory Approach

Key Points

• The study aims to analyze the measurement characteristics of the Coach Trust Scale for Taekwondo athletes using item response theory.
• Participants included 325 registered Taekwondo athletes for analysis.
• The scale was modified from Clark and Payne's model, comprising 15 items across five factors: integrity, ability, consistency, loyalty, and openness.
• Data analysis was performed using R software, employing factor analysis and graded response modeling.
• The Coach Trust Scale demonstrated good fit within a five-factor structure.
• Item response theory analysis revealed significant differences in item discrimination and difficulty levels.
• Informative function analysis showed high precision in measuring lower to average latent traits.

Abstract