The Uncertainty Stress Scale: its development and psychometric properties.

This paper describes the development and testing of a new scale--The Uncertainty Stress Scale--which measures uncertainty in illness-related situations, and the stress, threat, and positive feelings generated from the uncertain state. The theoretical and empirical basis of the scale is presented. Evidence which supports the scale's reliability and its content, concurrent, and construct validity is presented from several studies of people experiencing acute and chronic medical conditions. Descriptions and rationales for revisions are described.