The correct degree of freedom for the TEST effect below is:

Mauchly's Test of Sphericity Measure: MEASURE_1 Epsilon Within Subjects Mauchly's Approx. Chi Greenhouse Lower- Effect W Square df Sig. Huynh-Feldt -Geisser bound TEST 429 10.995 2 004 637 672 500 Tests of Within-Subjects Effects Measure: MEASURE_1 Source Type Ill Sum of Squares df Mean Square F Sig. TEST Sphericity Assumed 1266.761 2 633.381 3.468 045 Greenhouse-Geisser 1266.761 1.273 994.887 3.468 071 Huynh-Feldt 1266.761 1.344 942.842 3.468 068 Lower-bound 1266.761 1.000 1266.761 3.468 084 Error(TEST) Sphericity Assumed 5113.419 28 182.622 Greenhouse-Geisser 5113.419 17.826 286.855 Huynh-Feldt 5113.419 18.810 271.849 Lower-bound 5113.419 14.000 365.244HO- Memory score ...................... Cognitive load HH High O Low Familiar Unfamiliar Word typeMauchly's Test of Sphericity Measure: MEASURE_1 Epsilon Within Subjects Mauchly's Approx. Chi W df Greenhouse Effect Square Sig. Huynh-Feldt Lower- -Geisser bound TEST . 429 10.995 2 . 004 637 672 500 Tests of Within-Subjects Effects Measure: MEASURE_1 Source Type Ill Sum df F of Squares Mean Square Sig. TEST Sphericity Assumed 1266.761 2 633.381 3.468 045 Greenhouse-Geisser 1266.761 1.273 994.887 3.468 071 Huynh-Feldt 1266.761 1.344 942.842 3.468 068 Lower-bound 1266.761 1.000 1266.761 3.468 084 Error(TEST) Sphericity Assumed 5113.419 28 182.622 Greenhouse-Geisser 5113.419 17.826 286.855 Huynh-Feldt 5113.419 18.810 271.849 Lower-bound 5113.419 14.000 365.244