The March 2018 issue of Journal of Behavior Therapy and Experimental Psychiatry includes a compelling research study that just might convince you it’s true. Researchers evaluated 52 participants regarding sleep onset, sleep duration, and subsequent psychological and emotional state. Apparently, grandpa was right: going to bed later and getting less than adequate sleep was correlated with negative psychological and emotional outcomes.

Journal of Behavior Therapy and Experimental Psychiatry, March 2018, 58, 114-122