Psychometric Properties of the Processes of Change Scale for Smoking Cessation in Turkish Adolescents
Keywords:
smoking cessation, processes of change, adolescent, scaleAbstract
The aim of the present study was to adapted a ten-factor the
Processes of Change Scale for Smoking Cessation and to conduct validity
and reliability analysis. Processes of change for smoking cessation scale
were administrated to a sample of 276 adolescents. In scale adaptation
studies, first-order and second-order confirmatory factor analysis were used
for structure validity. To determine the reliability of the scale, Cronbach’s
Coefficient Alpha and test–retest were used. T-test and a corrected itemtotal correlation were used for item analisis. Corrected item-total
correlations and T-test, which for comparison of lower 27% and upper 27%
groups were formed according to total scores of the test, were used for item
analisis. Confirmatory factor analysis provided a good fit. Coefficient Alpha
was calculated for each of the two item scales. Values ranged from a low of
0.60 to a high of 0.85. Furthermore, Coefficient Alpha was calculated 0.84
for experiential processes and 0.78 for behavioral processes. Scale’s test–
retest reliability values ranged from a low of 0.62 to a high of 0.88. In the
result of the item analysis, corrected item-total correlations were ranged
from a low of 0.20 to a high of 0.55; and T –test values were ranged from a
low of 5,73 (p<.001) to a high of 12.20 (p<.001). These findings show that the
Turkish version of the Processes of Change Scale for Smoking Cessation is a
valid and reliable instrument.
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