Psychological Effects of Sleep Deprivation on Decision-Making and Mood

ABSTRACT: This qualitative study investigates the psychological effects of sleep deprivation on decision-making and mood through in-depth interviews with 35 participants (aged 20–44, 51.4% male, 48.6% female) from diverse educational and occupational backgrounds. Thematic analysis of self-reported data revealed that 31.4% experienced irregular or insufficient sleep (<7 hours), primarily due to stress (71.4%) and excessive screen time (62.9%, 1–16+ hours daily). Sleep deprivation was linked to negative mood states, including irritability (51.4%), fatigue/lethargy (34.3%), and anxiety (22.9%), with 48.6% reporting decision-making impairments such as indecisiveness and poor choices. Frequent fast food consumption (≥2 times/week, 40%) worsened mood and lethargy, while screen breaks (57.1%) and healthier diets improved psychological outcomes. Findings underscore the need for interventions like digital detoxes and sleep hygiene education to mitigate the adverse effects of sleep deprivation, particularly among high-screen-use groups like students and professionals. Keywords: Sleep deprivation, decision-making, mood, screen time, digital detox, qualitative interviews, psychological well-being