Fig. 2From: Are subjective sleepiness and sleep quality related to prospective memory?Scatterplots and correlations between the Karolinska Sleepiness Scale (KSS) ratings, the Pittsburgh Sleep Quality Index (PSQI), and the prospective-memory (PM) measures. Note that high KSS scores indicate strong subjective sleepiness, whereas high PSQI scores indicate low subjective sleep qualityBack to article page