Using Confirmatory Factor Analysis (CFA) and Rasch Model to calculate construct validity, this study tries to figure out relationship and difference of both method and it’s meaning. This psychological testing which is used in this study consists of ...
Using Confirmatory Factor Analysis (CFA) and Rasch Model to calculate construct validity, this study tries to figure out relationship and difference of both method and it’s meaning. This psychological testing which is used in this study consists of three sub-factors which are cognition, affective, and behavior. And this psychological testing can be answered with polytomous item.
As a result, the researcher confirms that there is no relationship between construct validity which is calculated by CFA and construct validity which is calculated by Rasch Model. In addition, the researcher realizes CFA is meaningful to verify construct validity of testing construction, and Rasch model is meaningful to calculate construct validity of item unit. This difference is affect the number of item, item inter-correlation, each of the items response pattern, and the way to ensure the invariance of parameter in CFA and Rasch model.
In conclusion, a study on the development and validity of the scale must be performed by verifying both construct validity of item unit deducted by Rasch Model and construct validity of testing construction deducted by CFA. And the researcher should examining construct validity of testing construction after the examining construct validity of item unit.