Estimating the Psychometric Properties of the Career Planning Scale Using the Graded Response Model

Abstract

The current research aimed to estimate the psychometric properties of the Career Planning Scale using the graded response model. The scale was administered to a sample of 463 students, The Career Planning Scale (CPS), which was developed by John Liptak (2008). The researcher used the MULILOG and R software to calibrate the scale items according to the graded response model. The results showed that the items of the scale were consistent with the graded response model, and all scale items had high to very high discrimination parameters. In addition, the results indicated that the difficulty parameters of the scale items were below average for all items, except for two. The scale demonstrated high values for marginal and empirical reliability coefficients, and the item information function values were high, indicating the accuracy of the scale in estimating the abilities of individuals with moderate levels of career planning. However the item and test information function values were low for individuals with high or low levels of career planning. The results also showed moderate to high correlations between the estimates of the dimensions of the Scale, and between the estimates of each dimension and the total score, indicating that validity the scale.