As expected, a significant main effect of self-talk on vertical jump measures was found such that participants who were assigned to the positive self-statements condition performed better on the vertical jump (M = 31.09, SD = 7.51) than participants assigned to the negative self-statements condition (M = 27.70, SD = 6.92), F(1, 146) = 8.65, p = .004, η2 p = .056. There was no effect of head movements on vertical jump (F < 1, p = .62).