Both groups improved their knot tying performance ( P < .05 ) from pretest to the low anxiety conditions ( mean difference : QET , 28 % ; TT , 17 % ) ; however , only the QET group maintained their knot tying performance under the high-anxiety conditions ( mean difference : QET , 18 % ; P < .05 ) , with the TT group decreasing their performance close to pretest levels ( P > .05 ) .