Examined characteristics of highly accessible personal memories of 137 undergraduates who recounted experiences occurring during 1 of 3 intervals (freshman year in college, sophomore year, or the transition from high school to college). Ss described the 1st 4 memories that came to mind and rated each experience for intensity of emotion, surprise, life impact, frequency of retelling, clarity , and date of occurrence. Most memories focused on social, nonacademic themes. The temporal distribution of memories showed a marked clustering in September. Ratings of emotional intensity were uniformly high, while ratings of life impact and surprise were lower. Results suggest that vivid episodic memories are overrepresented at periods of life transition and that they are triggered by the intense emotions experienced at such times. (PsycINFO Database Record (c) 2012 APA, all rights reserved)