People move to music and coordinate their movements with others spontaneously. Does music enhance spontaneous coordination? We compared the influence of visual information (seeing or not seeing another person) and auditory information (hearing movement or music or hearing no sound) on spontaneous coordination. Pairs of participants were seated side by side in rocking chairs, told a cover story, and asked to rock at a comfortable rate. Both seeing and hearing the other person rock elicited spontaneous coordination, and effects of hearing amplified those of seeing. Coupling with the music was weaker than with the partner, and the music competed with the partner's influence, reducing coordination. Music did, however, function as a kind of social glue: participants who synchronized more with the music felt more connected.

An experienced cello soloist recorded her practice as she learned and memorized the Prelude from J.S. Bach’s Suite No. 6 for solo cello and gave 10 public performances over a period of more than three years. She described the musical structure, decisions about basic technique (e.g., bowing), interpretation (e.g., dynamics), and five kinds of performance cues she attended to during performance (expressive, interpretive, intonation, and basic technique separately for left and right hand). The 38 hours of practice provide the most comprehensive empirical account to date of preparation of a new piece of music for performance. The cellist repeatedly took the piece apart section-by-section and then re-integrated the sections into practice performances in each of five stages: exploration, smoothing out, listening, reworking and preparation for performance. The location of starts, stops and repetitions identified the changing focus of practice in each stage. The cellist organized her practice around the musical structure, developed interpretation before working on technique and practised memory retrieval at each stage. When she wrote out the score from memory, better recall of expressive and structural performance cues showed that they served as landmarks in a hierarchical memory retrieval organization.

This article discusses memory for performance, focusing on the role of serial chaining and content addressability. Two areas of the episodic memory literature are particularly relevant to the discussion: oral traditions and expert memory. In oral traditions, materials such as children's rhymes and folk songs are handed down from one generation to another without the benefit of written records, often for hundreds of years. Expert memory results from years of training and the effective use of retrieval schemes. Expert memorists develop retrieval strategies to make their memories content-addressable so that they can find the information they needwhenthey need it. Anders Ericsson's theory of expert memory is used to explain how experienced performers memorize, as opposed to simply learn, a new piece.

Tempo arches have often been reported in polished music performances, but their development during the learning of a new piece has not been studied. We examined the development of expressive timing at three levels of musical structure (piece, section, phrase) as an experienced concert soloist (the second author) prepared the Prelude from J. S. Bach’s Suite No. 6 for solo cello for public performance. We used mixed effect models to assess the development of expressive timing and the effects of the performance cues (PCs) that the cellist used as mental landmarks to guide her performance. Tempo arches appeared early in practice at all three levels of musical structure and changed over time in complex ways, first becoming more pronounced and more asymmetrical and then shrinking somewhat in later performances. Arches were also more pronounced in phrases that contained PCs, suggesting that PCs reminded the cellist where to “breathe” between phrases. The early development of tempo arches suggests that they were an automatic product of basic cognitive or motor processes. The complex trajectory of their later development appeared to be the result, at least in part, of a deliberate communicative strategy intended to draw listeners’ attention to some musical boundaries more than others.

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