Special attention to the training and selection of listeners and program material can lead to more reliable and efficient listening test measurements. To this end, the authors developed a self-administered, computer-automated training program designed to improve a listener's ability to reliably identify and rate different types of spectral distortions added to different program material. The training has identified significant differences among listeners in their abilities to reliably identify and rate these distortions. Most of the intra-subject variance is due to the program material. This information can form an objective basis for selecting the most reliable and skilled listeners and the most revealing program material.
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