Objectives
The present study sought to develop a new psychometrically sound measure of ontological insecurity, the OIS‐34 and, determine its relationship with subclinical psychotic‐like experiences (PLEs).
Methods
A nonclinical sample (N = 600) completed an initial 60‐item version of the new scale along with measures of PLEs, psychosis proneness, and mental health history.
Results
Exploratory factor analysis indicated a single factor, ontological insecurity, with 34 items loading positively and above a criterion of 0.4. Internal consistency and test–retest reliability were excellent. The OIS‐34 correlated positively and significantly with psychosis proneness and subclinical positive and negative symptom PLEs. The OIS‐34 also differentiated significantly between participants with and without a history of mental health problems, including psychosis.
Conclusions
The OIS‐34 appears to represent a psychometrically sound measure of ontological insecurity. The results suggest that the concept is associated with PLEs. Directions for further research are discussed.