That is, no information is available in the present manuscript about alternative cluster solutions from the analysis, for example, the extent to which BIC and the silhouette coefficient differed for other solutions and so forth.
Second, the manuscript should be carefully edited as there are a fair number of grammatical and typographical errors, including lack of subject-verb agreement in places (e.g., using “were” and “was” in the same sentence, both referring to the same measure - CU traits), omitted words, and so forth.