A test of the psychometric properties of the cancer locus of control scale in Greek patients with advanced cancer

Objective The study aimed to assess the psychometric properties of the Cancer Locus of Control (CLOC) scale on a Greek sample of advanced cancer patients. Methods The scale was translated with the forward–backward procedure to Greek. The CLOC scale was administered to 140 advanced cancer patients. I...

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Bibliographic Details
Published in:Psycho-oncology (Chichester, England) England), 2012-11, Vol.21 (11), p.1215-1221
Main Authors: Mystakidou, Kyriaki, Tsilika, Eleni, Parpa, Efi, Panagiotou, Irene, Galanos, Antonis, Gouliamos, Athanasios, Watson, Maggie
Format: Article
Language:English
Subjects:
Adaptation, Psychological
adjustment
Adult
Aged
Aged, 80 and over
Cancer
Construct validity
Correlation analysis
Discriminant analysis
Factor Analysis, Statistical
Female
Greece
Humans
Internal-External Control
Locus of control
Male
Middle Aged
Neoplasm Staging
Neoplasms - psychology
Oncology
palliative
Palliative Care
Psychometric properties
Psychometrics - methods
Quantitative psychology
Reproducibility of Results
Severity of Illness Index
Surveys and Questionnaires
Terminally ill people
Translating
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Summary:Objective The study aimed to assess the psychometric properties of the Cancer Locus of Control (CLOC) scale on a Greek sample of advanced cancer patients. Methods The scale was translated with the forward–backward procedure to Greek. The CLOC scale was administered to 140 advanced cancer patients. It was administered twice, with a 3‐day interval, to 100 (of the 140) eligible patients with advanced cancer. Together with the CLOC scale, the patients also completed the Greek Mental Adjustment to Cancer (G‐MAC) scale. Confirmatory factor analysis was carried out using the AMOS 7.0 analysis. The reliability was assessed by the internal consistency (Cronbach's α coefficients), test–retest (Spearman's r value) of the instrument, and inter‐item correlations. Construct validity was assessed using the G‐MAC scale, interscale correlations, item–scale correlations, and scales–total correlations. Results The homogeneity of the subscales proved to be satisfactory (α coefficient ranged from 0.713 to 0.786). Overall test–retest reliability was satisfactory at p 
ISSN:1057-9249
1099-1611
DOI:10.1002/pon.2014