Psychometric Properties of the Life Congruence Scale Based on the Satir Model: Thai Version

Abstract

ABSTRACT

Objective: To develop and test the psychometric properties of the Life Congruence Scale Thai version. The 75-item, 7-point rating scale derived from the original Congruence Scale which was developed based on the Satir Model by Lee, consists of three components; Interpersonal dimension, Intrapsychic dimension and Universal-spiritual dimension.

Materials and Methods: The study was conducted in two-phase. Phase 1 was the 3-step translation process, starting with a symmetrical translation approach for the original Congruence Scale, blind back-translation from Thai to English, and blind back-translation from English to Thai. The clarity and readability of the scale was determined by male and female alcohol-dependent patients (n = 6) and persons who participated in the Satir Model training (n = 26). Then, the scale was reviewed for content validity by three experts, and pre-testing was conducted by both gender of alcohol-dependent patients and the general population (n = 6). In Phase 2, psychometric properties of the scale were evaluated. Field testing was performed with 995 persons for (1) item analysis, and (2) construct validity, evaluated by using known group approach and factor analysis, (3) reliability coefficient alpha.

Results: The values of the item-level content validity index and scale-level content validity index were 1.00 and 1.00, respectively. The psychometric properties of the scale were evaluated by 340 alcohol-dependent patients; substance-dependent patients; and patients receiving mental health chinic, 318 nurses and nurse aids, and 337 members of the general population (total sample = 995); the findings showed the following; (1) an item mean close to the center of the range of 7 was found in 57 items, while 54 items showed good item discrimination power. There were 22 item that haditem-total correlation at least 0.3; r > 0.3 (2) construct validity derived from the known group approach (n = 75) showed 21-items correlated to each other. Exploratory factor analysis revealed that there were four components with 21-item of the scale; Spiritual dimension, Intrapsychic-Interpersonal dimension, Internal resources dimension, and Interpersonal dimension, and the percent of variance accounted for 47.19, (3) reliability using cronbach alpha coefficient was 0.86 consists of 21 item which.

Conclusion: The Life Congruence Scale has high validity and high reliability. Which could be used in the research about life congruence and satir therapy.