Verification for the Validity and Reliability of the Type D Scale-14

Son, Haeng Mi

Abstract

PURPOSE: The purpose of this study was to verify the validity and reliability of the Type D Scale-14 (DS14).
METHODS
The participants were 288 patients who were diagnosed with angina pectoris, myocardial infarction, and hypertension. DS14 was developed by Denollet(2005) and consists of two domains, 7 items on negative affectivity (NA) and 7 items on social inhibition (SI). The Korean version of DS14 was developed through translation-reversed translation and a preliminary test. Data were collected using a self-report questionnaire. Cronbach alpha and Guttman split-half were used to test reliability and item analysis and factor analysis for validity. The SPSS program was used.
RESULTS
35.8% of the participants were classified as Type D. Mean score for NA was 16.80 and for SI, 14.10 in Type D participants. For reliability of NA, Cronbach alpha=0.771, and for SI, 0.707. Factor analysis on 12 items(numbers 1 & 3 were excluded as the corrected item-total correlations were below r=0.3) yielded two factors for NA (6 items) and SI (6 items). Number 7 in the NA domain was sorted into the SI domain.
CONCLUSION
The results indicate, the cultural differences were between Europeans and Koreans. Repetition of the research is needed for generalization of DS14.