MULTIDIMENSIONAL HEALTH LOCUS OF CONTROL SCALE C FORM: A RELIABILITY AND VALIDITY STUDY

M. Rita Krespi, Irmak ARSLAN

Öz


Abstract

This study aimed to investigate the validity and reliability of the Multidimensional Health Locus of Control Scale (MHLC) Form C in a Turkish sample of patients with End-Stage Renal Failure (ESRF). The sample consisted of 109 men and 87 women. The reliability of the scale was assessed by paying attention to internal consistency and 2 months test-retest reliability whereas its validity was assessed by paying attention to construct and criterion validities. To determine the criterion validity of the scale, a number of hypotheses concerning the ways in which locus of control were related to quality of life, emotional well-being and adherence to diet and fluid restrictions were tested. To test these hypotheses, patients completed the MHLC-Form C, SF-36 and the General Health Questionnaire-12 (GHQ-12). Adherence to diet and fluid restrictions were assessed through clinical measures including interdialytic weight gain and blood urea, potassium and creatinine levels. The findings showed that the scale was internally consistent (Internal HLOC =.82; Chance HLOC =.82; Doctors HLOC=.63; Powerful Others HLOC =.57) and had high test-retest reliability (Internal HLOC, .88; Chance HLOC, .83; Doctors HLOC, .72; Powerful Others HLOC, .57). The findings provided partial support for the hypotheses which in turn provided some evidence for the validity of the scale. More studies are needed to further examine the validity of the scale. Nevertheless, it is envisaged that this scale can be used in ESRF patients to examine the effect of locus of control on outcome measures such as quality of life, emotional well-being and adherence.


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