Nezlek, J. B., & Plesko, R. M. (2001). Day-to-day relationships among self-concept clarity, self-esteem, daily events, and mood. Personality and Social Psychology Bulletin, 27, 201-211.

Twice a week for up to ten weeks, 103 participants provided measures of their daily self-concept clarity (SCC), mood (NA and PA), and self-esteem (SE), and they described the events that occurred each day. Hierarchical linear modeling analyses found that daily SCC covaried with daily positive and negative events, with daily NA, and with daily SE. None of these relationships were moderated by trait levels of SE, SCC, PA, NA, nor measures of depressogenic self-concept, anxiety, or depressive symptoms. Analyses that simultaneously included SE, mood, and events suggested that relationships between daily SCC and daily events were mediated by daily NA and daily self-esteem. Additional analyses found that temporal variability of SE, PA, NA, and SCC was negatively correlated with trait SCC.