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Table 5 Comparison of experimental conditions (control, non-gamified; and experimental; gamified) in terms of participants’ system access for each time-point (TP)

From: Gamification suffers from the novelty effect but benefits from the familiarization effect: Findings from a longitudinal study

  Yuen-Welch test Effect size
TP t(df) p p-adj 95% CI ES 95% CI
1 22.458 (199.67) 0.000 0.000 − 32.564 − 27.307 0.794 0.721 0.882
2 22.252 (303.48) 0.000 0.000 − 30.655 − 25.673 0.822 0.737 0.899
3 15.019 (193.11) 0.000 0.000 − 27.913 − 21.433 0.708 0.582 0.806
4 10.696 (152.51) 0.000 0.000 − 26.744 − 18.404 0.561 0.440 0.678
5 18.783 (152.56) 0.000 0.000 − 47.941 − 38.816 0.783 0.680 0.863
6 18.640 (163.20) 0.000 0.000 − 49.943 − 40.375 0.780 0.670 0.860
7 16.877 (153.56) 0.000 0.000 − 50.217 − 39.692 0.749 0.629 0.832