In this study, a moderate stability of type membership was found during adolescence. An important finding was that besides the non-changing groups, the change from under-controller to over-controller was the most frequently occurring change in type membership. Specific changes in type membership were associated with specific levels of anxiety and specific changes in type membership were associated with specific changes in anxiety level. It generally appeared that stability in type membership was related to stability in anxiety level and that (contrary) change in type membership was related to (contrary) change in anxiety level. Lastly, clear differences were found between early and middle adolescence on the rank-order and mean-level continuity of the big five personality dimensions. Although the stability and changeability of personality has long been debated, many studies now agree that personality changes over the life course. Although the changes in rand-order and mean-level stability are well established, the stability in personality type membership during adolescence is not yet clear. Little research has been conducted on the associations between changes in personality type membership anxiety. In this study, 827 adolescents completed personality and anxiety questionnaires on 2 waves of the CONflict And Management Of RElationships study (CONAMORE). Figures, tables, references