Methods for analyzing performance of musical rhythm

Performance of musical rhythm was analyzed to test the hypothesis that such performance is characterized by certain systematic variations as regards the durations of the sound events in relation to strict mechanical regularity. Monophonic performances of 28 melodies in different notations were registered, and the duration data were treated by a special computer program for systematic variations and by factor analysis. The methods are illustrated for one of the melodies demonstrating pronounced systematic variations and different types of performance as found by factor analysis.     

Performance of musical rhythm in 3/4 and 6/8 meter

Monophonic performances of 15 melodies in 3/4 or 6/8 meter were analyzed according to previously described methods (Bengtsson & Gabrielsson, 1980) to test the hypothesis that live performance of musical rhythm is characterized by various systematic variations (SYVAR) as regards the duration of the sound events in relation to strict mechanical regularity. The results show many different types of SYVAR, varying with music and/or performers but with certain recurring features. at the sound event level as well as at the beat, half-measure and measure levels. It is pointed out that these results should be supplemented by data in other performance variables, and that there probably are certain basic relationships between SYVAR and different aspects of the rhythm response to be further investigated.     

Performance of rhythm patterns

Abstract.— Two pianists and one percussionist performed a number of notated rhythms on the piano and on the side drum or the bongo drum. The tape-recordings of the performances were analyzed by an analyzer for mono-phonic sound sequences as regards the durations and the amplitudes. Several characteristic deviations from the norms implied by the musical notation appeared. The recordings were used as stimuli in experiments on rhythm experience described elsewhere.     

Adjective ratings and dimension analyses of auditory rhythm patterns

Gabrielsson, A. Adjective ratings and dimension analyses of auditory rhythm patterns. Scand. J. psychol., 1973, 14, 244–260.-Rhythm experience for three classes of auditory rhythm stimuli, including music, was investigated by a variant of semantic differential technique in six experiments. The rating scales were chosen by means of questionnaires to musicians. The subjects rated the rhythms in a number of the scales and the ratings were subjected to factor analysis. The factors were interpreted as "uniformity-variation" or "simplicity-complexity", "accentuated first beat", "meter", "basic pattern", "rapidity", "movement characters" (floating-stuttering, dancing-walking and others), "vital-dull", "excited-calm", and "rigid-flexible".     

An empirical comparison between some models for multidimensional scaling

Abstract.— The results of three methods for multidimensional scaling—Torgerson's metric analysis, a non-metric method (TORSCA), and a method dealing with individual differences in multidimensional scaling (INDSCAL)—were compared in experiments on rhythm experience and on perception of sound quality. The INDSCAL analysis seemed to be the most adequate method for treating the data in these experiments.     

A SEX COMPARISON OF FACTORS RELATED TO SUCCESS IN NAVAL HOSPITAL CORPS SCHOOL1

Background information, Comrey Personality Scale scores, and a standard Navy aptitude test score were obtained on 600 Navy enlisted men and 600 Navy enlisted women prior to beginning Naval Hospital Corps School training. A comparison of the men and women indicated that the sexes differed on a number of background and personality dimensions. A double-split cross-validation design with multiple regression was then employed in the development of a test battery for predicting school completion. Results indicated that the men were more predictable than the women with cross-validities on the order of .53 for men and .41 for women. For the total sample, cross-validities were approximately .47. An empirical comparison of the utility of these equations for screening candidates for paramedical training suggested that the use of separate equations with the sexes would not produce results which were substantially different from use of the single equation developed on both sexes combined.     

Patterns of perceptual change in the ages 7 to 15 years: a cross-sectional study of the Rod-and-Frame Test and the spiral aftereffect technique

Abstract.— Studied cross-sectional changes in Rod-and-Frame Test (RFT) deviation scores and spiral aftereffect (SAE) duration scores in 124 boys and 124 girls aged 7, 9, 11, 13 and 15 years. The gradual decrease in magnitude of RFT deviation with age reached its minimum at the age of 13. A sex difference, disappearing with age, was adequately described by a measure of performance change, boys counteracting to a higher extent than girls the frame influence as the RFT trials proceeded. An increase in SAE duration, found previously with 5-year-olds, appeared here with 111-year-olds but later in a series of ten trials rather than initially as with the younger children. Relations between RFT and SAE scores were mainly found with 7-year-olds, i.e. at an age when per-ceptual-figural regulations may still dominate the cognitive organization of some children. The SAE results are viewed within a multi-line developmental model characterizing cognitive growth as a dialectic process of progressive shifts between objectivized and self-centered modes of representation.     

Temporal brightness and darkness enhancement; further evidence for asymmetry

Abstract.— Previous studies by the authors on brightness and darkness enhancement during flicker indicate a sizeable and consistent difference in magnitude between the two effects, as defined in terms of log matching luminance. To explore whether this difference is an artifact of the logluminance representation of the perceptual effects, a psychophysical scaling experiment was performed and results from present and former flicker experiments were replotted in terms of subjective units. When the depth of luminance modulation of the flicker stimulus exceeded 50%, the difference in magnitude of temporal brightness and darkness enhancement was somewhat smaller expressed in subjective units compared to a log-luminance representation. On the whole, however, the two plots gave essentially similar results. The results are discussed with reference to the neurophysiological theory of the B- and D-systems.