Thesis (Ed.D.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / A musical task involving pitch discrimination was developed and taught to children and adults. The task was a single tone matching procedure employing three organ tones and keys in the "do, re, mi" configuration, in which individually presented ("heard") tones, served as stimuli controlling selection of keys for tone-matching responses. The design of the study included an exploratory phase, in which sequences of material were manipulated and behavioral (performance) characteristics investigated, and a control experiment, in which reinforcing stimuli (feedback contingencies) were manipulated. Data describing errors as a function of trials and other relationships between stimuli and response events were collected. These were plotted in the form of individual cumulative records and stimuli-response tracking charts, respectively. Pre-adult subjects ranging in age from four to eleven years were recruited from an academic and professional population attending a private school. Adult subjects (ranging in age from 24 to 78 years) were selected on the basis of their claims to (a) not being "musical, " (b) not being able to read music, (c) not having any recent or prolonged music study. All subjects worked at the keyboard of a specially adapted organ by which tones were presented, responses recorded, and feedback provided. The study was primarily concerned with the following questions: 1. Would this key-tone matching task be "easy" or "difficult"? 2. Could performance be improved by employing the objective procedures described? 3. What behavioral characteristics could be revealed by the use of such procedures? Data from the exploratory phase (conducted with youth subjects) indicated that matching "do, re, mi" keys to their associated tones in single tone matching trials was not as "easy" a task as one might have expected. Analyses of stimuli-response tracking charts indicated that the major "pre-solution" behavior patterns were affected by the programmed sequences of material, and by the one, two, three, order inherent in the stimuli themselves. These data also provided evidence of the systematic nature of such performance, and that the relationships between sequence of material and patterns of responding can be subjected to experimental control. In the control experiment (conducted with youth and adult subjects) three different reinforcement procedures (feedback contingencies) were tested on a sequence of material developed in the exploratory phase. Procedure l provided production of the trial tone plus a red light signal for a correct response, and silence (no consequence) for an incorrect response. Procedure 2 was the same as procedure l, with exception that the red light signal was withheld. In procedure 3, correct and incorrect responses produced the associated tones of the keys pressed. Control experiment data (cumulative error graphs) revealed improvement in 13 out of 14 youth subjects, and in 10 out of 15 adult subjects. The procedures in which subjects heard the correct tones and not the incorrect tones in training (l and 2) produced more learning than the procedure (3) in which subjects heard the correct as well as the incorrect tones. Also, more learning was achieved under procedure l, which provided the red light consequence in addition to the tone for correct responding, than under procedure 2, which provided the tone only (no light). A behavioral model of key-tone matching was suggested as the framework for further research. The implications of the study were seen to extend beyond musical learning theory, to auditory learning theory in general. The relevance of the findings to education in general and to adult education in particular was indicated. / 2031-01-01

The purpose of this study was to examine the effectiveness of the Yamaha Junior Music Programme in developing pitch discrimination and rhythm performance skills in five- and six-year old children over a six month period. Specifically, it aimed to measure improvements in the ability to distinguish between high and low-pitched tones, the ability to identify the pitch of tones, the ability to imitate rhythms, and the ability to beat in time to music in four groups of ten subjects. Two groups (Y1 and Y2) had been involved in the Yamaha music programme, which aimed to improve the skills mentioned above. The other two groups (K1 and K2) had attended Kindergarten but had not been involved in any formal music programmes. Two of these groups (Y1 and K1) participated in pre-tests and post-tests. The other two groups (Y2 and K2) had participated in the post-tests only. The two groups which were taught via the Yamaha method consisted of ten students (male and female). The two other groups consisted of ten students in each group. These groups comprised students randomly selected from two Kindergarten classes at Fraser Primary school in the A.C.T. All students were presented with three tests: one pitch test, and two rhythm performance tests. Each test contained ten items. The three tests were trialled in a pilot study, with only minimum changes to procedure being required. The Yamaha groups were also given a pitch identification test at the conclusion of the six-month period. Each student's performance in the ten trials of the three tests was recorded on audio tape. Three judges used these recorded responses to grade each student's performance. The trials were also recorded digitally on an Apple II Computer using a sequencing software package. Detailed statistical analysis was carried out on both subjective and digital scores. The experimental design used in this research was the "Solomon's Four" design, which was ideal in controlling for internal sources of invalidity. A series of comparisons were drawn between the various groups involved, and it was concluded that the six-month Yamaha aural training programme led to the following outcomes: * improvements in the ability of Yamaha students to determine pitch height. * a higher incidence of improvement for the experimental group in the pitch pairs test (to determine pitch height) than for the control group. * improvements in the ability of Yamaha students to identify the pitch of notes. * no statistically significant improvements for Yamaha students at the end of six months for rhythm test A (rhythm imitation). * no statistically significant improvements in the performance of Yamaha students at the end of six months for rhythm test B (beating in time to music). * no statistically significant improvements in the performance of the Kindergarten groups at the end of six months for rhythm test A. * no statistically significant improvements in the performance of the Kindergarten groups at the end of six months for rhythm test B. A number of explanations were offered for the absence of improvement in the two rhythm tests and recommendations were made for future research.

Ninety college Ss were first classically "conditioned" to color names and subsequently transferred to a dichotic listening task requiring shadowing of a five-minute prose passage. Embedded in the non-attended channel were previously shock-associated color words. In one condition (same pitch) both the shadowed and non-attended material was read by the same speaker. In the second condition (different pitch) the shadowed and non-attended channels were read by different speakers. Within conditions right/left ear of presentation of shadowing was factorially arranged. The dependent measure was phasic skin resistance changes in the non-attended channel to previously shock-associated stimuli. Autonomic responding was not affected by pitch characteristics. Ear of presentation showed a strong effect; autonomic responding to non-attended stimuli was enhanced by left ear presentation. The interaction of pitch by ear of presentation was significant; a left ear advantage was favored in the same pitch condition. Shadowing efficiency was not impaired at the time of responding to non-attended material nor was shadowing performance altered by pitch distinctions or ear of presentation. The above findings are discussed in terms of the Deutsch and Deutsch and Treisman theories of selective attention. / Arts, Faculty of / Psychology, Department of / Graduate

Thesis (Ph.D.). / Written for the Montreal Neurological Institute. Title from title page of PDF (viewed 2008/01/12). Includes bibliographical references.

Auditory filters were derived in 20 normal-hearing human listeners at center frequencies (CFs) of 913, 1095, 3651, and 4382 Hz using the roex (p,r) method. Comparisons were made between slopes of the filters' skirts at the neighboring CFs with filter output levels of 45 and 70 dB. The same comparisons were made with regard to filter equivalent rectangular bandwidth (ERB). In the 1000-Hz region, the low-frequency slopes (Pl) of filters centered at 913 and 1095 Hz were significantly correlated at both stimulus levels, while the high-frequency slopes (Pu) were similar only at the high test level. In the 4000-Hz region, for sinusoids of 3651 and 4382 Hz, the level effect was clearer as both Pu and Pl values diverged at the low level but were related at high levels. The ERBs centered at the same CFs displayed a similar level dependence. At the stimulus level most likely to be affected by an active feedback mechanism, auditory filters centered at nearly the same frequency displayed quite distinct frequency selectivity, and this trend was stronger in the 4000-Hz region than the 1000-Hz region. The findings suggest that a saturating, active cochlear mechanism may not be distributed evenly, or contribute to peripheral tuning with equal effectiveness throughout the length of the partition.

L’amusie congénitale est un trouble neuro-développemental qui s’exprime par un déficit de discrimination tonale fine. Le cerveau des amusiques ne répond pas aux petites différences de hauteur, tel que révélé par l’absence de la composante de potentiel évoqué P3b, qui est associée aux processus de discrimination tonale tardifs et conscients. Peu d’études se sont penchées sur les mécanismes précoces et préconscients de discrimination tonale chez les amusiques, qui peuvent être étudiés par l’entremise d’une composante de potentiel évoqué appelée la négativité de discordance (MMN). Certaines études ont démontré qu’il est possible d’enregistrer la MMN pendant la présentation d’un film avec la trame sonore en simultané aux sons visant à évoquer la composante. Toutefois, une étude a démontré que la présentation de la trame sonore réduisait l’amplitude de la MMN, sans néanmoins clarifier la nature de l’effet d’interférence en cause. Les objectifs du présent projet sont d’abord, d’investiguer les effets à l’origine de la réduction d’amplitude de la MMN observée lors de la présentation d’un film avec la trame sonore, puis d’évaluer cette même composante chez les amusiques. La première étude visait à déterminer si un effet d’interférence attentionnelle ou acoustique était en cause dans la réduction d’amplitude observée sur la MMN lors de la présentation de la trame sonore d’un film. Les résultats ont montré qu’un effet de masquage acoustique, attribuable à la trame sonore, était responsable de la réduction d’amplitude de la MMN, cette dernière augmentant au fur et à mesure que l’intensité sonore de la trame du film était réduite. La seconde étude a été conduite dans le but d’investiguer la MMN chez les amusiques et de vérifier si le complexe d’ondes anormales N2b-P3b, observé en réponse aux grandes différences tonales chez les amusiques, pouvait être attribuable à un effet de saillance des stimuli. Dans un premier temps, nous avons comparé la MMN des amusiques à celle des contrôles, puis nous avons modifié le paradigme expérimental visant à évoquer la N2b-P3b en ajustant les probabilités d’occurrence des sons présentés aux contrôles en fonction des sons perçus par les amusiques. Les résultats ont montré que le cerveau des amusiques parvient à discriminer les différences de hauteur à un niveau précoce et préconscient, tel que révélé par une MMN normale, mais que les réponses cérébrales plus tardives, associées au processus de discrimination des hauteurs conscient, sont anormales chez les amusiques, et ce, uniquement pour les petites différences de hauteur, tel que révélé par l’absence de la P3b. En conclusion, ces résultats démontrent que l’amplitude de la MMN est affectée de manière significative par la présentation de la trame sonore d’un film et que cela est attribuable à un effet d’interférence acoustique. Dans un deuxième temps, nous avons démontré que les mécanismes précoces et préconscients de discrimination tonale sont préservés chez les amusiques, et que le déficit sous-jacent à l’amusie congénitale est attribuable à une atteinte du processus de discrimination tonale fine associé à un niveau de traitement cérébral tardif et conscient, le complexe d’ondes anormales N2b-P3b étant pour sa part attribuable à un effet de saillance des stimuli. / Congenital amusia is a neurodevelopmental disorder which is characterized by a deficit in fine-grained pitch discrimination. In fact, the amusic brain does not respond to small pitch changes, such as reflected by the absence of the event-related (ERP) component P3b, which is associated to late and conscious pitch discrimination processes. Until now, very few studies focused on early preconscious levels of processing in amusia, which can be studied through an ERP component called the mismatch negativity (MMN). Some studies have demonstrated that the MMN can be recorded while playing the soundtrack of a movie in concurrence with the MMN-critical tones. However, one study demonstrated that playing the movie soundtrack reduced MMN amplitude, but did not investigate the origin of this effect. The main goals of this project are, first, to investigate the nature of the effect responsible for the MMN reduction observed when playing a movie soundtrack, and secondly, to evaluate the MMN in congenital amusia. The first study aimed to investigate if an attentionnal or acoustical interference effect could account for the reduction in MMN amplitude observed when playing the movie soundtrack. The results showed that an acoustical masking effect of the movie soundtrack was responsible for the reduction in MMN amplitude. In fact, MMN amplitude increased as the intensity level of the movie soundtrack decreased. The goal of the second study was to investigate the MMN in congenital amusia, but also to explore if the abnormal N2b-P3b complex observed in amusics in a previous study could be accounted for by an effect of salience of the stimuli. Thus, we first compared the MMN results between amusics and controls, and then, we modified the experimental paradigm meant to evoke the N2b-P3b by adjusting the probabilities of occurrence of the sounds presented to the controls as a function of the sounds perceived by their matched amusics. The results showed that the amusic brain can detect all pitch changes at an early and preconscious level of processing, such as demonstrated by a normal MMN in both groups. Furthermore, our results showed that the amusic brain does not respond normally solely to small pitch changes at a later conscious level of processing, such as revealed by the absence of the P3b, thus showing that the abnormal N2b-P3b complex of ERP components observed in a previous study is better explained by a saliency effect of the stimuli and does not represent an electrophysiological anomaly specific to congenital amusia. In conclusion, our results have first shown that MMN amplitude is decreased by presenting a movie soundtrack and this is due to a masking effect at the acoustical level of the soundtrack over the MMN-critical tones. Finally, our second study showed that the early preconscious mechanisms of pitch discrimination are preserved in congenital amusia, and that the pitch deficit underlying congenital amusia is limited to an anomaly in the late and conscious processing of small pitch changes, the abnormal N2b-P3b complex being rather explained by an effect of salience of the stimuli.

L’amusie congénitale est un trouble neuro-développemental qui s’exprime par un déficit de discrimination tonale fine. Le cerveau des amusiques ne répond pas aux petites différences de hauteur, tel que révélé par l’absence de la composante de potentiel évoqué P3b, qui est associée aux processus de discrimination tonale tardifs et conscients. Peu d’études se sont penchées sur les mécanismes précoces et préconscients de discrimination tonale chez les amusiques, qui peuvent être étudiés par l’entremise d’une composante de potentiel évoqué appelée la négativité de discordance (MMN). Certaines études ont démontré qu’il est possible d’enregistrer la MMN pendant la présentation d’un film avec la trame sonore en simultané aux sons visant à évoquer la composante. Toutefois, une étude a démontré que la présentation de la trame sonore réduisait l’amplitude de la MMN, sans néanmoins clarifier la nature de l’effet d’interférence en cause. Les objectifs du présent projet sont d’abord, d’investiguer les effets à l’origine de la réduction d’amplitude de la MMN observée lors de la présentation d’un film avec la trame sonore, puis d’évaluer cette même composante chez les amusiques. La première étude visait à déterminer si un effet d’interférence attentionnelle ou acoustique était en cause dans la réduction d’amplitude observée sur la MMN lors de la présentation de la trame sonore d’un film. Les résultats ont montré qu’un effet de masquage acoustique, attribuable à la trame sonore, était responsable de la réduction d’amplitude de la MMN, cette dernière augmentant au fur et à mesure que l’intensité sonore de la trame du film était réduite. La seconde étude a été conduite dans le but d’investiguer la MMN chez les amusiques et de vérifier si le complexe d’ondes anormales N2b-P3b, observé en réponse aux grandes différences tonales chez les amusiques, pouvait être attribuable à un effet de saillance des stimuli. Dans un premier temps, nous avons comparé la MMN des amusiques à celle des contrôles, puis nous avons modifié le paradigme expérimental visant à évoquer la N2b-P3b en ajustant les probabilités d’occurrence des sons présentés aux contrôles en fonction des sons perçus par les amusiques. Les résultats ont montré que le cerveau des amusiques parvient à discriminer les différences de hauteur à un niveau précoce et préconscient, tel que révélé par une MMN normale, mais que les réponses cérébrales plus tardives, associées au processus de discrimination des hauteurs conscient, sont anormales chez les amusiques, et ce, uniquement pour les petites différences de hauteur, tel que révélé par l’absence de la P3b. En conclusion, ces résultats démontrent que l’amplitude de la MMN est affectée de manière significative par la présentation de la trame sonore d’un film et que cela est attribuable à un effet d’interférence acoustique. Dans un deuxième temps, nous avons démontré que les mécanismes précoces et préconscients de discrimination tonale sont préservés chez les amusiques, et que le déficit sous-jacent à l’amusie congénitale est attribuable à une atteinte du processus de discrimination tonale fine associé à un niveau de traitement cérébral tardif et conscient, le complexe d’ondes anormales N2b-P3b étant pour sa part attribuable à un effet de saillance des stimuli. / Congenital amusia is a neurodevelopmental disorder which is characterized by a deficit in fine-grained pitch discrimination. In fact, the amusic brain does not respond to small pitch changes, such as reflected by the absence of the event-related (ERP) component P3b, which is associated to late and conscious pitch discrimination processes. Until now, very few studies focused on early preconscious levels of processing in amusia, which can be studied through an ERP component called the mismatch negativity (MMN). Some studies have demonstrated that the MMN can be recorded while playing the soundtrack of a movie in concurrence with the MMN-critical tones. However, one study demonstrated that playing the movie soundtrack reduced MMN amplitude, but did not investigate the origin of this effect. The main goals of this project are, first, to investigate the nature of the effect responsible for the MMN reduction observed when playing a movie soundtrack, and secondly, to evaluate the MMN in congenital amusia. The first study aimed to investigate if an attentionnal or acoustical interference effect could account for the reduction in MMN amplitude observed when playing the movie soundtrack. The results showed that an acoustical masking effect of the movie soundtrack was responsible for the reduction in MMN amplitude. In fact, MMN amplitude increased as the intensity level of the movie soundtrack decreased. The goal of the second study was to investigate the MMN in congenital amusia, but also to explore if the abnormal N2b-P3b complex observed in amusics in a previous study could be accounted for by an effect of salience of the stimuli. Thus, we first compared the MMN results between amusics and controls, and then, we modified the experimental paradigm meant to evoke the N2b-P3b by adjusting the probabilities of occurrence of the sounds presented to the controls as a function of the sounds perceived by their matched amusics. The results showed that the amusic brain can detect all pitch changes at an early and preconscious level of processing, such as demonstrated by a normal MMN in both groups. Furthermore, our results showed that the amusic brain does not respond normally solely to small pitch changes at a later conscious level of processing, such as revealed by the absence of the P3b, thus showing that the abnormal N2b-P3b complex of ERP components observed in a previous study is better explained by a saliency effect of the stimuli and does not represent an electrophysiological anomaly specific to congenital amusia. In conclusion, our results have first shown that MMN amplitude is decreased by presenting a movie soundtrack and this is due to a masking effect at the acoustical level of the soundtrack over the MMN-critical tones. Finally, our second study showed that the early preconscious mechanisms of pitch discrimination are preserved in congenital amusia, and that the pitch deficit underlying congenital amusia is limited to an anomaly in the late and conscious processing of small pitch changes, the abnormal N2b-P3b complex being rather explained by an effect of salience of the stimuli.