The purpose of this study was to investigate whether the prospective teachers' average scores based on new component comprising of the subdimensions of the Authentic Assessment Belief Scale and Groupwork Skills Scale differs from each other significantly in terms of the field factor they are studying. For this purpose, in the context of survey research, the descriptive and correlational investigations were presented and then multivariate analysis of variances (MANOVA) was conducted on the study group including 434 prospective teachers. Results show that subdimensions of these scales were correlated at moderate level in general and the score means differ from each other at each subdimension according to the field factor. Moreover, when each subdimension were treated as dependent variable and were analyzed simultanously, it was concluded that prospective teachers differ from each other in terms of field factor depending of the new component resulting from MANOVA. Lastly, when post-hoc test were conducted it was observed that in general, highest scores were obtained by the prospective teachers that are studying at the field of language education, whereas the lowest scores were obtained with the field of social sciences. The results have implications on the simultaneous examination of at least two psychological construct when making inferences about the prospective teachers and by the way considering the probable differences based on the different fields they were trained.