Unrealistic Optimism Scale

Description

The Unrealistic Optimism Scale is a self-report psychometric instrument developed by Mamalakis and Triliva (2002) to assess levels of optimism and, more specifically, the extent to which individuals hold positive expectations about the future.

Unrealistic optimism refers to the tendency to expect more positive future outcomes compared with one’s evaluation of the present situation. The scale therefore allows a comparison between how individuals perceive their current circumstances and how they expect these circumstances to develop in the future.

Purpose

The primary purpose of the scale is to assess the degree of optimism or pessimism and to examine the positive expectations individuals hold regarding different areas of their lives.

Particular emphasis is placed on the distinction between the evaluation of the present and expectations for the future. In this way, the instrument makes it possible to estimate the extent to which individuals believe that their life circumstances will improve or deteriorate over time.

Scale Structure

The Unrealistic Optimism Scale consists of 16 items, divided into two main subscales:

Present Subscale: consists of 8 items and assesses the individual’s evaluation of their current situation.

Future Subscale: also consists of 8 items and assesses expectations regarding the individual’s future situation.

The items in the two subscales are similar in content and differ mainly in their time reference, that is, whether they refer to the present or the future.

Scoring

Participants indicate the degree to which each statement describes them using a 7-point response scale.

This format allows for a graded assessment of participants’ agreement or identification with each statement and enables separate scores to be calculated for the two time-related dimensions.

Statistical Analysis and Score Interpretation

A total score is calculated separately for each subscale by summing the responses to its 8 items.

The overall Unrealistic Optimism score is then calculated as:

Future Subscale Score − Present Subscale Score

This difference represents the direction and magnitude of the change that the individual expects between their current and future situation.

A positive overall score indicates that expectations for the future are more positive than perceptions of the present situation and therefore reflects greater optimism.

In contrast, a negative overall score indicates that expectations for the future are less positive than evaluations of the present and is interpreted as reflecting a more pessimistic outlook.

Validity and Reliability

The Unrealistic Optimism Scale has been reported to demonstrate good face validity and good construct validity.

Internal consistency reliability has been assessed using Cronbach’s alpha, with coefficients ranging overall from 0.67 to 0.79.

More specifically:

Future Subscale: Cronbach’s α = 0.74–0.79

Present Subscale: Cronbach’s α = 0.67–0.73

These values indicate acceptable to satisfactory internal consistency for the two subscales.

Applications

The Unrealistic Optimism Scale may be used in psychological and social research examining optimism, future expectations, and perceptions of current life circumstances.

The distinction between present and future evaluations makes it possible to investigate how individuals perceive the likely course of their lives and may support research on relationships between optimism and other psychological variables, such as psychological well-being, adjustment, and coping with difficulties.

References

Mamalakis G, Triliva S. Unrealistic Optimism Scale. In: Stalikas A, Triliva S, Roussi P, eds. Psychometric Instruments in Greece. Athens: Ellinika Grammata; 2002. pp. 299–300.