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Investigating the impact of sleep quality on cognitive functions ... frontiersin.org Frontiers 16 facts
referenceThe study 'Investigating the impact of sleep quality on cognitive functions' utilized a moderation analysis to test whether the relationship between sleep quality (PSQI scores) and cognitive performance (measured by RAVLT, Stroop Test, RPM, and WCST) differs significantly between university students in Tokyo and London.
procedureThe study used the Pittsburgh Sleep Quality Index (PSQI), actigraphy, and a battery of cognitive assessments including the Rey Auditory Verbal Learning Test (RAVLT), Stroop Test, Raven's Progressive Matrices (RPM), and Wisconsin Card Sorting Test (WCST) to measure sleep and cognitive performance.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Wisconsin Card Sorting Test (WCST) performance is −0.35, which is statistically significant at p < 0.001.
measurementHigher Pittsburgh Sleep Quality Index (PSQI) scores, which indicate poorer sleep quality, are associated with lower performance on the Rey Auditory Verbal Learning Test (RAVLT), Stroop Test, Raven's Progressive Matrices (RPM), and Wisconsin Card Sorting Test (WCST) (p < 0.001).
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and WCST performance is −0.42 (p < 0.001) for students in Tokyo and −0.28 (p < 0.001) for students in London.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and the Rey Auditory Verbal Learning Test (RAVLT) is r = -0.32 (p < 0.001); the correlation with the Stroop Test is r = -0.28 (p < 0.001); the correlation with Raven's Progressive Matrices (RPM) is r = -0.25 (p < 0.001); and the correlation with the Wisconsin Card Sorting Test (WCST) is r = -0.35 (p < 0.001).
measurementIn regression analyses predicting cognitive performance from Pittsburgh Sleep Quality Index (PSQI) scores, the standardized regression coefficient (β) for the RAVLT is -0.20 (SE 0.05, p < 0.001), for the Stroop Test is -0.15 (SE 0.04, p < 0.001), for the RPM is -0.12 (SE 0.03, p < 0.01), and for the WCST is -0.23 (SE 0.06, p < 0.001).
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Wisconsin Card Sorting Test (WCST) performance is -0.42 in Tokyo and -0.28 in London, indicating a stronger negative relationship between sleep quality and cognitive flexibility in Tokyo.
measurementThe Pittsburgh Sleep Quality Index (PSQI) score significantly predicts performance on the Wisconsin Card Sorting Test (WCST) (β = -0.23, p < 0.001) after controlling for demographic variables, indicating that sleep quality independently impacts cognitive flexibility and set-shifting abilities.
claimRegression analyses indicate that Pittsburgh Sleep Quality Index (PSQI) scores significantly predict performance on cognitive measures (RAVLT, Stroop Test, RPM, and WCST) even after controlling for demographic variables (age, gender, socioeconomic status) and actigraphy-measured sleep duration and efficiency.
measurementThe correlation between Pittsburgh Sleep Quality Index (PSQI) scores and Wisconsin Card Sorting Test (WCST) performance is -0.35 (p < 0.001).
measurementThe interaction term (PSQI x City) for the impact of sleep quality on Wisconsin Card Sorting Test (WCST) performance was measured at β = −0.12 with a p-value of 0.09, indicating the result is not statistically significant at the conventional p < 0.05 level.
claimHigher Pittsburgh Sleep Quality Index (PSQI) scores are associated with lower Wisconsin Card Sorting Test (WCST) scores, indicating that poorer sleep quality is linked to poorer cognitive flexibility and more perseverative errors.
claimPoor sleep quality, as measured by the Pittsburgh Sleep Quality Index (PSQI), is significantly associated with lower cognitive performance across domains including verbal learning and memory (measured by the Rey Auditory Verbal Learning Test), attention and executive function (measured by the Stroop Test), non-verbal reasoning (measured by the Raven's Progressive Matrices), and cognitive flexibility (measured by the Wisconsin Card Sorting Test).
claimA study investigating university students in Tokyo, Japan, and London, UK, found significant negative associations between sleep quality (measured by the Pittsburgh Sleep Quality Index) and cognitive performance across domains including verbal learning and memory (RAVLT), attention and executive function (Stroop Test), non-verbal reasoning (RPM), and cognitive flexibility (WCST).
measurementThe interaction term between sleep quality (measured by the Pittsburgh Sleep Quality Index) and city location (Tokyo vs. London) on Wisconsin Card Sorting Test (WCST) performance resulted in β = −0.12 and p = 0.09, indicating the result is not statistically significant at the conventional p < 0.05 level.