Temporal and frequency auditory streaming capacities were assessed for non-musician (NM), expert musician (EM), and amateur musician (AM) listeners using a local-global task and an interleaved melody recognition task, respectively. Data replicate differences previously observed between NM and EM, and reveal that while AM exhibits a local-over-global processing change comparable to EM, their performance for segregating a melody embedded in a stream remains as poor as NM. The observed group partitioning along the temporal-frequency auditory streaming capacity map suggests a sequential, two-step development model of musical learning, whose contributing factors are discussed.
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