• Publications
  • Influence
The Warwick-Edinburgh Mental Well-being Scale (WEMWBS): development and UK validation
WEMWBS is a measure of mental well-being focusing entirely on positive aspects of mental health that offers promise as a short and psychometrically robust scale that discriminated between population groups in a way that is largely consistent with the results of other population surveys.
Positive Change Following Trauma and Adversity: A Review
The review revealed inconsistent associations between adversarial growth, sociodemographic variables (gender, age, education, and income), and psychological distress variables (e.g., depression, anxiety, posttraumatic stress disorder), however, the evidence showed that people who reported and maintained adversarialgrowth over time were less distressed subsequently.
The Authentic Personality: A Theoretical and Empirical Conceptualization and the Development of the Authenticity Scale
This article describes the development of a measure of dispositional authenticity and tests whether authenticity is related to well-being, as predicted by several counseling psychology perspectives.
A dual representation theory of posttraumatic stress disorder.
A cognitive theory of posttraumatic stress disorder (PTSD) is proposed that assumes traumas experienced after early childhood give rise to 2 sorts of memory, 1 verbally accessible and 1 automatically
Positive Adjustment to Threatening Events: An Organismic Valuing Theory of Growth through Adversity
A positive psychological theory of growth through adversity is proposed. The organismic valuing theory of growth through adversity posits an intrinsic motivation toward growth, showing how this leads
Measuring delusional ideation: the 21-item Peters et al. Delusions Inventory (PDI).
The PDI's psychometric properties confirmed that it remains a reliable and valid instrument to measure delusional ideation in the general population and suggested that these dimensions may be more important than the content of belief alone for placing an individual on the continuum between normal and delusional thinking.
Development of the multidimensional peer-victimization scale
Although researchers have traditionally distinguished between. direct (e.g., name-calling, hitting) and indirect (e.g., ignoring, scapegoating) types of peer-victimization, there remains disagreement
Measurement of Delusional Ideation in the Normal Population: Introducing the PDI (Peters et al. Delusions Inventory)
The ranges of scores between the normal and deluded groups overlapped considerably, consistent with the continuity view of psychosis, and the two samples were differentiated by their ratings on the distress, preoccupation, and conviction scales, confirming the necessity for a multidimensional analysis of delusional thinking.
Psychometric Evaluation of Horowitz's Impact of Event Scale: A Review
  • S. Joseph
  • Psychology
    Journal of traumatic stress
  • 2000
The psychometric properties of the Impact of Event Scale are satisfactory (although not as a PTSD diagnostic measure) and that continued use of the IES as a measure of intrusive and avoidant processes is warranted.