The Impact of Intolerance to Uncertainty, Fatigue and Decision-Making Styles Among Adults

The study aimed to assess the impact of intolerance to uncertainty, fatigue, and decision-making styles among adults. The present study addresses the existing gap in examining these variables simultaneously. Uncertainty and fatigue are key factors that determine the quality of decision-making engagement and the approach an individual opts for. Data of 226 adults, between the age group of 18–43, was used as they include the population of both emerging adults and millennials. For this cross-sectional survey design, standardized scales such as the Intolerance to Uncertainty Short Form (IU-SF), General Decision-Making Style (GDMS), and Fatigue Assessment Scale (FAS) were used. Data were analysed using SPSS through descriptive statistics, Pearson’s correlation, and linear regression. Results showed that intolerance to uncertainty had a significant positive relationship with fatigue, as well as with avoidant and dependent decision-making styles. Fatigue demonstrated a negative correlation with the rational style and positive correlations with avoidant and dependent styles. Regression analysis indicated that intolerance to uncertainty significantly predicted avoidant and dependent decision-making, while fatigue negatively predicted rational style and positively predicted dependent style, although the effect sizes were small. Intuitive and spontaneous styles were unaffected by uncertainty and fatigue, suggesting that these rely more on instinctive and immediate reactions rather than cognitive or emotional factors. The findings highlight the complex nature of decision-making under uncertain and fatiguing conditions.