THE INFLUENCE OF DURATION ON VERBAL-ATTRIBUTE RATINGS OF COMPLEX PROTOMUSICAL SOUNDS

Based on natural spectra, 7 different complex sounds were synthesized digitally, each in a long version (3 s in duration) and in a short ver sion (0.5 s in duration) for a total of 1,4 sounds. These stimuli were presented to 34 subjects who rated each sound on each of 12 seven-poi nt verbal scales. A rating was defined as an emotional response. Based on previous work, mutually exclusive subsets of the emotional respons es to four scales were assigned to each of three verbal dimensions or factors. the Factors were: I, Tension-Relaxation; II, Lightheartedness -Gloom; and III, Attraction-Repulsion. By means of analysis-of-varianc e methods it was found that the sounds evoked divergent emotional resp onses with respect to all three factors and that the emotional respons es to short-duration sounds were similar to those to long-duration sou nds. Only for Factor II was there a significant interaction, in that t wo of the short sounds were rated more lighthearted than the two corre sponding long sounds. Otherwise it appears that emotional responses to the short sounds did not differ from those to their corresponding lon g sounds, as measured by mean ratings. Because the responses to given short versions or long versions of the complex sounds were essentially the same, it may be concluded that the short versions contain conside rable information, and the two versions are therefore substitutable fo r each other as experimental stimuli. Another implication is that even very brief complex sounds can elicit emotional ratings of the kind de fined here.