The advantage of distributed practice in a blended learning setting.

However, this predictor did not reach statistical significance ( p = .17) and one should be careful when interpreting this variable individually as it varies with studying regularity and total hours studied, their zero-order correlations being r = .33 and r = .75, respectively (see Appendix Fig. 2 ).

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The questionnaire was validated by correlating its results with the daily lowest bodily temperature of the subjects and the daily onset of melatonin production and found highly significant correlations.

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