Developmental models of supervision have focused on the importance of personal reflection in counselor development. Examining counselors' self-talk is one method to understand counselors' internal processes. This presentation will compare the differences in self-talk that counselors with high level and low level cognitive complexity use, in order to better understand the development of case conceptualization skills. The results of a study will be reviewed examining the differences of frequency, ratio, and flexibility among self-talk categories of higher-complexity and lower-complexity counselors. Implications for counselor training and supervision will be discussed.