Deliberate practice (DP) is a task-specific structured training activity that plays a key role in understanding skill acquisition and explaining individual differences in expert performance. Relevant activities that qualify as DP have to be identified in every domain. For example, for training in classical music, solitary practice is a typical training activity during skill acquisition. To date, no meta-analysis on the quantifiable effect size of deliberate practice on attained performance in music has been conducted. Yet the identification of a quantifiable effect size could be relevant for the current discussion on the role of various factors on individual difference in musical achievement. Furthermore, a research synthesis might enable new computational approaches to musical development. Here we present the first meta-analysis on the role of deliberate practice in the domain of musical performance. A final sample size of 13 studies (total N = 788) was carefully extracted to satisfy the following criteria: reported durations of task-specific accumulated practice as predictor variables and objectively assessed musical achievement as the target variable. We identified an aggregated effect size of rc = 0.61; 95% CI [0.54, 0.67] for the relationship between task-relevant practice (which by definition includes DP) and musical achievement. Our results corroborate the central role of long-term (deliberate) practice for explaining expert performance in music.

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This study presents the Chinese adaptation of the Goldsmiths Musical Sophistication Index (Gold-MSI), an instrument for measuring individual differences in musical ability and skilled musical behaviour. Its psychometric properties were examined with a Taiwanese sample. The Gold-MSI inventory was translated into Chinese following recommendations from the literature on cross-cultural test development. Subsequently, the psychometric properties of the Chinese Gold-MSI self-report inventory, including the Melody Memory Task and the Beat Alignment Perception Task, were evaluated using an online survey with 1,065 participants. Results of confirmatory factor analysis suggest that the original factor structure of the Gold-MSI inventory showed an acceptable fit with the data from the Chinese-speaking sample. In addition, the Chinese Gold-MSI inventory shows good reliability. The Melody Memory Task and the Beat Alignment Perception Task also have sufficient test-retest reliability. Finally, correlations between the Chinese Gold-MSI inventory and the Musical-Rhythmic Intelligence subscale of the Eight Multiple Intelligences Questionnaire as well as the two additional music tests provide evidence for convergent and divergent validity. Overall, the data suggest that the Chinese Gold-MSI has good psychometric properties. Percentile norms for the Gold-MSI inventory and the music tests from the present sample are reported for use in future studies. The present study thus makes a valuable contribution to cross-cultural research in music psychology by enabling the comparison between Chinese and Western studies of individual differences in musical ability.

Songs heard between the ages of 15 and 24 should be remembered better and have a stronger relationship to autobiographical memories when compared with music from other phases of life ("reminiscence bump effect"). Additionally, the proportion of music-evoked autobiographical memories (MEAMs) is at a maximum in these years of early adolescence and then declines up to the age of 60. In our study we tried both to replicate these important findings based on a German sample and to further investigate the influence of the affective characteristics of the songs on the frequency of participants' autobiographical memories. In Experiment 1 a group of adults (N = 48, M age = 67.1 years) listened to excerpts from 80, number-one, popular music hits from 1930 to 2010 and gave written self-reports on MEAMs. In Experiment 2 the affective characteristics were rated by another group of adults (N = 22, M age = 66 years) and were used to predict the frequency of MEAMs. As a main result of Experiment 1, we confirmed the reminiscence bump and decline effect with a small effect size for the ratings of feelings evoked by the song and with a medium effect size for the song recognition performance of those songs released during the participants' age range of 15 to 24 years. The total number of MEAMs was only marginally influenced by a memory bump and decline effect, and participants showed a significant proportion of MEAMs up to the fifth decade. Experiment 2 revealed that the affective ratings of the songs were unequally distributed over the two-dimensional emotion space unlike the average rate of MEAMs which was nearly equally distributed. In contrast to previous research, we therefore conclude that