This study assessed the multimodal effects of electromyographic biofeedback on highly trait-anxious subjects, boys who scored in the upper quartile of the Sport Competition Anxiety Test (SCAT). Subjects participated in a bogus sport competitive tournament and participated individually in six laboratory sessions that consisted of a practice session and five matches. Each session comprised an adaptation period and three games separated by three rest periods. Biofeedback or placebo condition was administered during the rest periods. Frontalis EMG, heart rate, and respiratory rate were measured at the end of a rest period and immediately before every game (i.e., stress periods). State anxiety (STAIC; Spielberger, Gorsuch, & Lushene, 1970) was measured before every game, and game performance was also recorded. Results from a MANOVA combining the three physiological variables revealed significant variations between rest and stress periods but no significant group differences. Results from univariate repeated measures ANCOVAs on all dependent variables revealed that the biofeedback group was superior to the placebo group in reducing frontalis EMG both during rest periods and in the general competitive setting. Results support the specificity of single-system biofeedback training and are discussed in light of the discriminative/motor skills model and the trophotropic rebiasing model.
Marc R. Blais and Robert J. Vallerand
Luc G. Pelletier, Kim M. Tuson, Michelle S. Fortier, Robert J. Vallerand, Nathalie M. Briére and Marc R. Blais
A new measure of motivation toward sport has been developed in French, namely the Echelle de Motivation vis-à-vis les Sports. Two studies were conducted to translate and validate this new measure in English. The Sport Motivation Scale (SMS) consists of seven subscales that measure three types of Intrinsic Motivation (IM; IM to Know, IM to Accomplish Things, and IM to Experience Stimulation), three forms of regulation for Extrinsic Motivation (Identified, Introjected, and External), and Amotivation. The first study confirmed the factor structure of the scale and revealed a satisfactory level of internal consistency. Correlations among the subscales revealed a simplex pattern confirming the self-determination continuum and the construct validity of the scale. Gender differences were similar to those obtained with the French-Canadian version. The more self-determined forms of motivation were associated with more positive responses on related consequences. In a second study, the SMS was administered on two occasions and revealed adequate test-retest reliability.