Results of the NH participants for original (O) and vocoded sounds (16, 8, and four channels) in the PCD (identical and different trials) and DCI, according to the size of the changes. The percentage of correct responses for auditory and audiovisual trials are reported for PCD (A) and DCI (B). For PCD, six size changes were used for the different trials: 1/16, 1/8, ¼, ½, 1 or 2 tones, and results for identical trials are also presented. For DCI, seven size changes were presented: 0.5, 1, 1.5, 2; 2.5, 3, or 3.5 tones. The error bars represent the standard error of the mean. PCD: Pitch Change Detection; DCI: Direction Change Identification; Id.: Identical trials.