Abstract
BACKGROUND: Older adults can acquire new skills across different domains. Practicing a musical instrument has been identified as a promising activity for improving cognition, promoting well-being, and inducing brain plasticity in older individuals. However, the mechanisms of these changes are still poorly understood. This study aims to assess musical skill acquisition in musically naïve older adults over one year of practice, focusing on individual factors influencing this process and the relations between musical skills. METHODS: One hundred fifty-six healthy older adults (age = 69.5 years ± 3.2) from Hannover and Geneva with no prior musical training participated in weekly piano practice (PP) or 'music culture' (MC) sessions over a one-year period. Baseline assessments included the Cognitive Reserve Index questionnaire (CRIq) and Cognitive Telephone Screening Instrument (CogTel). Musical abilities were measured using piano performance ratings (PP group), music quizzes (MC group), and aptitude tests such as the Beat Alignment Test (BAT), Melodic Discrimination Test (MDT) and Midi Scale Analysis (MSA) at baseline and six-, twelve and 18-month timepoints. The interrelationship between musical abilities was investigated through correlational analyses, and changes impacted through individual characteristics were modeled using Bayesian statistics. RESULTS: The PP group demonstrated moderate improvements in piano articulation and dynamics, while the MC group achieved higher scores in the music quiz. Modest improvements in MDT and MSA were observed in both groups, with the PP group showing greater progress is MSA. Higher global cognitive functioning and musical sophistication was associated with greater performance in MDT for both groups. We did not identify any links between individual characteristics, like age, CogTel, CRIq, and musical sophistication, and improvement in musical aptitude tests. Changes in different musical aptitude test scores were not correlated, and neither the development of piano skills nor the music quiz correlated with initial performances on the musical aptitude tests. CONCLUSION: Musically naïve older adults can acquire diverse musical abilities, which progress independently, suggesting a broad spectrum of musical abilities rather than a single general musical aptitude. Future research should also explore genetic and psychosocial factors influencing musical development. TRIAL REGISTRATION: The Ethikkomission of the Leibniz Universität Hannover approved the protocol on 14.08.17 (no. 3604-2017), the neuroimaging part and blood sampling was approved by the Hannover Medical School on 07.03.18. The full protocol was approved by the Commission cantonale d'éthique de la recherche de Genève (no. 2016-02224) on 27.02.18 and registered at clinicaltrials.gov on 17.09.18 (NCT03674931, no. 81185).