Evaluating a digital serious game for learning medical terminology in a randomized controlled trial.

Finally, although the sample size ( n = 60) was adequate to detect statistically and practically significant effects—including large effect sizes for both primary (Cohen’s d = 0.90) and secondary outcomes (f2 = 2.89)—the number of predictors in the regression model ( k = 8) relative to the intervention group sample ( n = 30) raises the possibility of overfitting.

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