Helen Christina Slawik

This study investigates the impact of blue-yellow light changes on the human circadian clock and sleep, finding no significant effects under moderate light levels.

This study investigates whether high-melanopic light affects sleep and vigilance, finding no differential effects despite melatonin suppression.

This study shows daily caffeine intake impairs working memory and reduces hippocampal activity in healthy adults, with acute withdrawal also affecting cognitive performance.

This study investigates the acute effects of caffeine on sleep and circadian timing in teenagers, finding reduced sleep quality and delayed melatonin onset.

This study investigates the impact of daily caffeine intake on nighttime sleep in habitual consumers, finding no significant differences in sleep structure or quality but reduced sigma frequency EEG power density, suggesting early signs of overnight withdrawal.