Is there evidence suggesting that the sphericity assumption has been met?

Mauchly's Test of Sphericity(b) Measure: MEASURE_1 Epsilonfal Approx. Greenhouse- Within Subjects Effect Mauchlv's W Chi-Square Sia Huynh-Feldt Lower-bound Geisser time 596 8.141 5 149 818 966 333 Tests of Within-Subjects Effects Measure: MEASURE 1 Type Ill Sum Source of Squares di Mean Square Sia time Sphericity Assumed 3132.000 1044.000 15.771 1000 Greenhouse-Goisset 3132.000 2.454 1276.191 15,771 000 Huynh-Feldt 3132.000 2.899 1080.197 15.771 000 Lower-bound 3132.000 1.000 3132.000 15.771 001 Error(time) Sphericity Assumed 3376.000 51 66.196 Greenhouse-Geisser 3376.000 41.721 80.918 Huynh-Feldt 3376.000 49.291 68.491 Lower-bound 3376,000 17.000 198.568 Tests of Within-Subjects Contrasts Measure: MEASURE_1 Type Ill Sum Source time of Squares Mean Square Sia time Linear 2250.000 2250.000 35.668 000 Quadratic 882.000 882.000 10.200 005 Cubic .000 .000 .000 1.000 Error(time) Linear 1072.400 63.082 Quadratic 1470.000 86.471 Cubic 833.600 49.035 Tests of Between-Subjects Effects Measure: MEASURE_1 Transformed Variable: Average Type Ill Sum Source of Squares Mean Square Sia. Intercept 259200.000 259200.000 304.983 000 Error 14448,000 849.882 Estimated Marginal Means time