The sudden inability of a professional baseball player to throw the baseball accurately, a condition known as the “yips”, is considered a motor movement disruption. Movement-specific reinvestment, including movement self-consciousness (MS-C) and conscious motor processing (CMP), explains the disruption of well-learned motor movements in different performance domains such as throwing. The purpose of this quantitative, causal-comparative study is to examine movement-specific reinvestment level differences between self-reported yips-afflicted and non-afflicted professional baseball players in the United States as measured by the Movement Specific Reinvestment Scale (MSRS). A total of 130 professional baseball players (65 yips-afflicted and 65 non-afflicted) participated in the study. The findings demonstrated that significant differences in movement-specific reinvestment levels existed between the yips-afflicted group and the non-afflicted group. Movement-specific reinvestment total levels were higher in yips-afflicted participants (M = 43.60, SD= 9.28) than in non-afflicted participants (M = 33.98, SD = 8.71), U = 922, z = -5.55, p < .001. MS-C scores were higher in yips-afflicted participants (M = 19.30, SD = 5.82) than in non-afflicted participants (M = 13.61, SD = 5.01), U = 969.5, z = -5.33, p < .001. CMP scores were higher in yips-afflicted participants (M = 24.29, SD = 4.79) than in non-afflicted participants (M = 20.37, SD = 4.84), U = 1073, z = -4.85, p < .001.



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