sleep

How personality traits shape sleep quality

Zlatan Krizan (Hannah Olson-Wright) According to research by an Iowa State University psychologist, how well you sleep may depend as much on your personality as it does on your habits. Zlatan Krizan, professor of psychology, has spent more than a decade studying how personality traits affect both the perception and…

June 9, 2025

The struggle is real

New research from psychology professor Zlatan Krizan finds more Americans have trouble falling asleep and staying asleep.

November 18, 2019

Lack of sleep intensifies anger, impairs adaptation to frustrating circumstances

New Iowa State University research shows that losing just a couple hours of sleep at night makes you angrier, especially in frustrating situations.

November 27, 2018