Computerized Adaptive Testing (CAT) is a beneficial test technique that decreases the number of items that need to be administered by taking items in accordance with individuals' own ability levels. After the CAT applications were constructed based on the unidimensional Item Response Theory (IRT), Multidimensional CAT (MCAT) applications have gained momentum with the improvement of multidimensional IRT (MIRT) models in recent years. Researchers often benefit from simulation studies in order to design the final adaptive testing application and to test the effectiveness of adaptive testing applications they developed with different methods. Recently, R has become one of the most widely used programming languages in Monte Carlo Simulation studies since it is a free and open-source software. The aims of this study are to present the MCAT simulation process step by step in the R environment, to examine the effects of the conditions that researchers can handle during the simulation process according to two different dimensional models, and to examine the effect of treating multidimensional structures as unidimensional structures on simulation results. In this direction, datasets generated in accordance with within-item dimensionality and between-item dimensionality models, MCAT simulation studies were constructed with different customizations, and MCAT simulation results were compared with unidimensional CAT simulation results. All commands required for each simulation example were explained and results were shared for each condition.

In this study, it is aimed to improve the "Creativity-Supporting Home Environment Scale" for the purpose of determining the level of creativity in the home environment of parents with children aged 3-6 years old. Research study groups were composed of 500 parents across various provinces of Turkey. The scale items written in the context of the literature were presented to field experts for their opinion in accordance with the scale's purpose, and the content validity index was calculated as proof of the scale's content validity (.89). A pretest application of the scale was conducted in accordance with the expert opinion, and the items were examined for their distinctiveness. A test application was conducted for the purpose of demonstrating the factor structure of the scale, and whether or not the data was appropriate for factor analysis by using KMO and Bartlett statistics. Factor analysis based upon principal component analysis was performed with the optimum application of parallel analysis, and according to both parallel analysis and scree plot, it was decided that the structure was fourdimensional. The percentage of the factors explaining the total variance was established as 49.9%. The item test correlation values of the items in each factor were found to be above .30 in accordance with the item analysis results. Two items that did not fulfill the criteria were removed from the scale by performing a confirmatory factor analysis to verify the structure. Factor loadings for 28 items in the scale were found to be higher than .30 and with error variances below .90. It was found that the McDonald's omega coefficients were between .71 and .88, and the Composite reliability coefficients were between .70 and .84 in the calculation of the reliability of the scale scores for each of the scale's four dimensions. For the whole scale, the stratified alpha reliability coefficient was calculated as .87. The obtained findings demonstrate that the "Creativity-Supporting Home Environment Scale" is a valid and reliable scale.