Description

The Unrealistic Optimism Scale (UOS-16) is a self-report instrument designed to assess the tendency to believe that positive events are more likely to happen to oneself, while negative events are less likely to occur to oneself compared with other people.

This cognitive tendency is commonly described as unrealistic optimism or optimistic bias.

Purpose

The UOS-16 aims to measure the degree to which individuals hold overly favorable expectations about their own future relative to others.

It is particularly useful for examining associations between optimistic bias and risk perception, decision-making, health behavior, preventive behavior, and personal expectations.

Scoring

The scale contains 16 items involving comparative judgments about future events.

Higher scores generally indicate a stronger tendency toward unrealistic optimism, although interpretation should follow the scoring instructions of the specific version being used.

Applications

The UOS-16 can be used in research on health psychology, risk perception, social cognition, preventive behavior, decision-making, optimism, and psychological well-being.

Research Use

The scale is especially useful for exploring whether unrealistic optimism is associated with lower perceived personal vulnerability, reduced precautionary behavior, and more favorable expectations about future outcomes.