Figure 7.

Confusion matrix showing the results of an experiment in which 10 implant users identified 16 musical instruments in a closed-set procedure. The instrument sounds that were presented are shown in the left column. They were divided into two equal groups: eight were percussive (lower half), and the rest were non-percussive (upper half). Each subject heard each instrument sound a total of eight times. Their responses are shown in each cell of the matrix. The maximum possible score is 80 (10 subjects × 8 repetitions). Responses in cells that form the main diagonal of the matrix are correct identifications of the instruments; these are shown in bold type. The total number of times each instrument was named in the subjects’ responses is shown in the row at the bottom of the matrix.