Objectives: Bitterness has been suggested to be a common psychological reaction to persistentadversity; however it has thus far been understudied. The objectives of the current study weretherefore to: i) Develop a reliable and valid English language measure of bitterness, ii) Pilot thisnew measure within a clinical population, iii) Explore how the construct of bitterness relates totreatment outcome in psychological therapy, and iv) Determine whether bitterness accuratelypredicts suicidal ideation in clinical populations. Design: a cross sectional questionnaire designwas used. Method: A new bitterness measure was developed incorporating ideas from existingliterature and suggestions from experienced clinicians. This measure was completed by a nonclinical group (n = 313) and factor analysis was carried out on these data. The measure was then completed by a group of secondary care mental health service users (n = 31) and compared with the non clinical sample,. Additional symptom focussed measures were also completed by the clinical group. Results: Factor analysis showed that the bitterness measure was comprised off our subscales (labelled here as “experience of a negative event”,” nihilism”, “unfairness” and “negative interpersonal experiences”). Good internal consistency and acceptable test-retest reliability was found. Bitterness was found to be related to rumination, in particular the brooding / analytical subtype of rumination. A significant relationship was found with some measures of anger, but no significant relationship was found between bitterness and depression. Conclusions: Bitterness may be a unique construct, conceptually distinct from anger and depression and closely associated with analytical rumination.
|Date of Award||10 Sep 2014|
|Supervisor||Paul Salkovskis (Supervisor), Claire Lomax (Supervisor) & Josie Millar (Supervisor)|