Effect of a Competing Message on Synthetic Sentence Identification
Charles Speaks, Jane L. Karmen, Luis D. Benitez · Journal of Speech and Hearing Research · 1967
The function relating performance to intensity for synthetic sentence message sets presented in quiet is exceedingly steep. Two experiments were conducted to determine the degree to which the performance-intensity (P-I) function could be flattened by adding a competing message at selected message-competition ratios. Data were obtained from five trained listeners in a criterion-controlled experiment and 23 naive listeners in a criterion-free experiment. Addition of the competing message flattened the P-I function substantially. The degree of flattening was related to the presentation level of the messages.