Greco et al. [1], in the “Statement of significance” section, claim that their findings suggest that “[ . . . ] wearing an eye mask during sleep is an effective, economical, and noninvasive behavior that could benefit cognitive function and lead to measurable impacts on everyday life.” Here we examine some of the analysis choices made in this article and critically assess this claim. Firstly, Greco et al. should be applauded for clearly stating their analysis model and for publicly sharing their data (https://osf.io/q4p9v/), which made this reanalysis possible. In experiment 1, paired associates learning (PAL) was assessed on days 6 and 7 of the manipulation (eye mask or control), following 5 nights of habituation. On day 6 participants learned words paired with particular cue words up to a 60% correct criterion. The first test of PAL was then 10 minutes later with the number of correctly recalled words (out of 80) being the outcome. The second PAL assessment occurred on day 7 with no additional learning opportunities in between. The two PAL assessments were split up and analyzed separately via the following mixed effects model (using syntax from the lme4 package for R):