Previous research using creativity assessments has used latent class models and identified multiple classes (a 3-class solution) associated with various domains. This study explored the latent class structure of the Runco Ideational Behavior Scale, which was designed to quantify ideational capacity. A robust state-of the-art technique called the Mixed Rasch Model (MRM) was utilized with a sample of 765 Turkish middle school students. Consistent with previous studies, 3 clear latent classes were found in this study. Class 1 represents the "regular ideators class," Class 2 the "idea-producers class," and Class 3 the "idea-averters class." In this study the 3-class solution represents 3 different skills, rather than 3 different domains. This study showed a promising application of MRMs as an alternative to the latent class analysis (LCA) technique for researchers in the field. The study also provided further evidence for the multiple class structure found in previous creativity assessments.