This study investigates the effects of sample size and test length on item-parameter estimation in test development utilizing three unidimensional dichotomous models of item response theory (IRT). For this purpose, a real language test comprised of 50 items was administered to 6,288 students. Data from this test was used to obtain data sets of…

American Educational Research Association (AERA) standards stipulate that researchers show evidence of the internal structure of instruments. Confirmatory factor analysis (CFA) is one structural equation modeling procedure designed to assess construct validity of assessments that has broad applicability for counselors interested in instrument…

The growth of Smartphone usage, increased acceptance of electronic learning (E-learning), the availability of high reliability mobile networks and need for flexibility in learning have resulted in the growth of mobile learning (M-learning). This has led to a tremendous interest in the acceptance behaviors related to M-learning users among the…

Linear factor analysis models used to examine constructs underlying the responses are not very suitable for dichotomous or polytomous response formats. The associated problems cannot be eliminated by polychoric or tetrachoric correlations in place of the Pearson correlation. Therefore, we considered parameters obtained from the NOHARM and FACTOR…

"Curriculum alignment" is the compatibility between a country's centralized curriculum determined by the ministry of education and what teachers do during the teaching process. However, it is observed that teachers do not exactly implement the curriculum. The purpose of this study is to develop a scale that will determine the factors…

Scales constructed using principal components and Rasch measurement methods are compared under conditions of unclear constructs and marginal sample sizes with three data sets of increasing complexity. Results of the two methods were identical when data were stable and the structure unidimensional. (SLD)

Factor structure of the Reactions to Tests (RTT) scale measuring test anxiety was studied by testing a series of confirmatory factor models including a second-order structure with 636 college students. Results support a shorter 20-item RTT but also raise questions about the cross-validation of covariance models. (SLD)

The development of the new fifth edition of the Sixteen Personality Factor Questionnaire (16PF) is described. The factor structure of the new 16PF was explored with 4 samples ranging from 646 to 3,498 subjects. Results support the validity of the 16PF factor structure and its continuity with earlier versions. (SLD)