OBJECTIVE: Cognitive problems and biases play an important role in the development and continuation of psychosis. A self-report measure of these deficits and processes was developed (Davos Assessment of Cognitive Biases Scale: DACOBS) and is evaluated in this study. METHODS: An item pool made by international experts was used to develop a self-report scale on a sample of 138 schizophrenia spectrum patients. Another sample of 71 patients was recruited to validate the subscales. A group of 186 normal control subjects was recruited to establish norms and examine discriminative validity. RESULTS: Factor analyses resulted in seven factors, each with six items (jumping to conclusions, belief inflexibility bias, attention for threat bias, external attribution bias, social cognition problems, subjective cognitive problems and safety behavior). All factors independently explained the variance (eigenvalues>2) and total explained variance was 45%. Reliability was good (Cronbach's alpha=.90; split-half reliability=.92; test-retest reliability=.86). The DACOBS discriminates between schizophrenia spectrum patients and normal control subjects. Validity was affirmed for five of seven subscales. The scale 'Subjective Cognitive problems' was not associated with objective cognitive functioning and 'Social cognition problems' was not associated with the Hinting task, but with the scale measuring ideas of social reference. CONCLUSIONS: The DACOBS scale, with seven independent subscales, is reliable and valid for use in clinical practice and research.
OBJECTIVE: Cognitive problems and biases play an important role in the development and continuation of psychosis. A self-report measure of these deficits and processes was developed (Davos Assessment of Cognitive Biases Scale: DACOBS) and is evaluated in this study. METHODS: An item pool made by international experts was used to develop a self-report scale on a sample of 138 schizophrenia spectrum patients. Another sample of 71 patients was recruited to validate the subscales. A group of 186 normal control subjects was recruited to establish norms and examine discriminative validity. RESULTS: Factor analyses resulted in seven factors, each with six items (jumping to conclusions, belief inflexibility bias, attention for threat bias, external attribution bias, social cognition problems, subjective cognitive problems and safety behavior). All factors independently explained the variance (eigenvalues>2) and total explained variance was 45%. Reliability was good (Cronbach's alpha=.90; split-half reliability=.92; test-retest reliability=.86). The DACOBS discriminates between schizophrenia spectrum patients and normal control subjects. Validity was affirmed for five of seven subscales. The scale 'Subjective Cognitive problems' was not associated with objective cognitive functioning and 'Social cognition problems' was not associated with the Hinting task, but with the scale measuring ideas of social reference. CONCLUSIONS: The DACOBS scale, with seven independent subscales, is reliable and valid for use in clinical practice and research.
Authors: Yulia Landa; Kim T Mueser; Katarzyna E Wyka; Erica Shreck; Rachel Jespersen; Michael A Jacobs; Kenneth W Griffin; Mark van der Gaag; Valerie F Reyna; Aaron T Beck; David A Silbersweig; John T Walkup Journal: Early Interv Psychiatry Date: 2015-01-13 Impact factor: 2.732
Authors: Joanna M Fiszdon; David L Roberts; David L Penn; Kee-Hong Choi; Cenk Tek; Jimmy Choi; Morris D Bell Journal: Psychiatr Rehabil J Date: 2016-06-09
Authors: Jazz Croft; Jon Heron; Christoph Teufel; Mary Cannon; Dieter Wolke; Andrew Thompson; Lotte Houtepen; Stanley Zammit Journal: JAMA Psychiatry Date: 2019-01-01 Impact factor: 21.596
Authors: Paul A J M de Bont; David P G van den Berg; Berber M van der Vleugel; Carlijn de Roos; Cornelis L Mulder; Eni S Becker; Ad de Jongh; Mark van der Gaag; Agnes van Minnen Journal: Trials Date: 2013-05-23 Impact factor: 2.279
Authors: Rozanne J M Van Donkersgoed; Steven De Jong; Mark Van der Gaag; André Aleman; Paul H Lysaker; Lex Wunderink; G H M Pijnenborg Journal: BMC Psychiatry Date: 2014-02-03 Impact factor: 3.630