“…Although the TSI has been revised twice (TSI-R and TSI-R2; Sternberg, Wagner & Zhang, 2007), and a large number of empirical work is built on this instrument, studies provide only limited information on the quality of the questionnaire, indicating validity problems as a result. This lack of information results from (1) an unusual application of factor analyses that ignores the relationships between a thinking style and its corresponding items (e.g., Dai & Feldhusen, 1999;Fjell & Walhovd, 2004;Cano-Garcia & Hughes, 2000;Sternberg, 1994;Zhang, 2005Zhang, , 2008Zhang & Higgins, 2008); and (2) these studies applying factor analysis in ways that produce conflicts between the assumptions of factor analysis (e.g., a higher-order variable causes the characteristics of a lower-order variable; Brown, 2015) and the assumptions of the Theory of Mental Self-Government. Findings also reveal (3) a low discrimination between the thinking styles' scales (e.g., Black & McCoach, 2008;Dai & Feldhusen, 1999;Zhang, 1999); and (4) an unstable number of factors as well as style compositions contradicting Sternberg's (1997) theory (e.g., Dai & Feldhusen, 1999;Fjell & Walhovd, 2004;Cano-Garcia & Hughes, 2000;Ngan Man Fon, 2013;Zhang, 2008;Zhang & Higgins, 2008).…”