This study was designed to determine if adults are able to remember how much time they actually spent practicing during a past time period of their lives where detailed daily records were kept of actual number of minutes practiced. It also addressed how past practice time relates to their highest level of musical performance across the 30 years on a scale of top-level expert to competent. Responses were divided into six classifications: (1) professional; (2) semiprofessional; (3) free-lance musician/college instructor; (4) music teacher; (5) community musician; and (6) jury/senior recital. Results indicated that after a 30-year period, students are not accurate in assessing past amounts of applied music practice when comparing records of actual practice time to later perceptions of this practice time. Also, there is not a strong relationship between practice time and their highest level of performance, although most participants indicate that they believe that there is.