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Articles 1 - 30 of 31
Full-Text Articles in Life Sciences
Mapping Specific Mental Content During Musical Imagery, Mor Regev, Andrea R. Halpern, Adrian Owen, Aniruddh Patel, Robert J. Zatorre
Mapping Specific Mental Content During Musical Imagery, Mor Regev, Andrea R. Halpern, Adrian Owen, Aniruddh Patel, Robert J. Zatorre
Faculty Journal Articles
Humans can mentally represent auditory information without an external stimulus, but the specificity of these internal representations remains unclear. Here, we asked how similar the temporally unfolding neural representations of imagined music are compared to those during the original perceived experience. We also tested whether rhythmic motion can influence the neural representation of music during imagery as during perception. Participants first memorized six 1-min-long instrumental musical pieces with high accuracy. Functional MRI data were collected during: 1) silent imagery of melodies to the beat of a visual metronome; 2) same but while tapping to the beat; and 3) passive listening. …
No Evidence That Portion Size Influences Food Consumption In Male Sprague Dawley Rats, Fabien Naniex, Sophie C. Pinder, Megan Y. Summers, Renee M. Rouleau, Eric Robinson, Kevin P. Myers, James E. Mccutcheon
No Evidence That Portion Size Influences Food Consumption In Male Sprague Dawley Rats, Fabien Naniex, Sophie C. Pinder, Megan Y. Summers, Renee M. Rouleau, Eric Robinson, Kevin P. Myers, James E. Mccutcheon
Faculty Journal Articles
In studies of eating behavior that have been conducted in humans, the tendency to consume more when given larger portions of food, known as the portion size effect (PSE), is one of the most robust and widely replicated findings. Despite this, the mechanisms that underpin it are still unknown. In particular, it is unclear whether the PSE arises from higher-order social and cognitive processes that are unique to humans or, instead, reflects more fundamental processes that drive feeding, such as conditioned food-seeking. Importantly, studies in rodents and other animals have yet to show convincing evidence of a PSE. In this …
The Convergence Of Psychology And Neurobiology In Flavor-Nutrient Learning, Kevin P. Myers
The Convergence Of Psychology And Neurobiology In Flavor-Nutrient Learning, Kevin P. Myers
Faculty Journal Articles
Flavor evaluation is influenced by learning from experience with foods. One main influence is flavor-nutrient learning (FNL), a Pavlovian process whereby a flavor acts as a conditioned stimulus (CS) that becomes associated with the postingestive effects of ingested nutrients (the US). As a result that flavor becomes preferred and intake typically increases. This learning powerfully influences food choice and meal patterning. This paper summarizes how research elucidating the physiological and neural substrates of FNL has progressed in parallel with work characterizing how FNL affects perception, motivation, and behavior. The picture that emerges from this work is of a robust system …
Sensory-Specific Satiety Is Intact In Rats Made Obese On A High-Fat, High-Sugar Choice Diet., Kevin P. Myers
Sensory-Specific Satiety Is Intact In Rats Made Obese On A High-Fat, High-Sugar Choice Diet., Kevin P. Myers
Faculty Journal Articles
Sensory-specific satiety (SSS) is the temporary decreased pleasantness of a recently eaten food, which inhibits further eating. Evidence is currently mixed whether SSS is weaker in obese people, and whether such difference precedes or follows from the obese state. Animal models allow testing whether diet-induced obesity causes SSS impairment. Female rats (n = 24) were randomly assigned to an obesogenic high-fat, high-sugar choice diet or chow-only control. Tests of SSS involved pre-feeding a single palatable, distinctively-flavored food (cheese- or cocoa-flavored) prior to free choice between both foods. Rats were tested for short-term SSS (2 h pre-feeding immediately followed by 2 …
Feel The Noise: Relating Individual Differences In Auditory Imagery To The Structure And Function Of Sensorimotor Systems, Cesar F. Lima, Nadine Lavan, Samuel Evans, Zarinah Agnew, Andrea R. Halpern, Pradheep Shanmugalingam, Sophie Meekings, Dana Boebinger, Markus Ostarek, Carolyn Mcgettigan, Jane E. Warren, Sophie K. Scott
Feel The Noise: Relating Individual Differences In Auditory Imagery To The Structure And Function Of Sensorimotor Systems, Cesar F. Lima, Nadine Lavan, Samuel Evans, Zarinah Agnew, Andrea R. Halpern, Pradheep Shanmugalingam, Sophie Meekings, Dana Boebinger, Markus Ostarek, Carolyn Mcgettigan, Jane E. Warren, Sophie K. Scott
Faculty Journal Articles
Humans can generate mental auditory images of voices or songs, sometimes perceiving them almost as vividly as perceptual experiences. The functional networks supporting auditory imagery have been described, but less is known about the systems associated with interindividual differences in auditory imagery. Combining voxel-based morphometry and fMRI, we examined the structural basis of interindividual differences in how auditory images are subjectively perceived, and explored associations between auditory imagery, sensory-based processing, and visual imagery. Vividness of auditory imagery correlated with gray matter volume in the supplementary motor area (SMA), parietal cortex, medial superior frontal gyrus, and middle frontal gyrus. An analysis …
Sensory-Specific Appetition: Postingestive Detection Of Glucose Rapidly Promotes Continued Consumption Of A Recently Encountered Flavor, Kevin P. Myers, Marisa S. Taddeo, Emily K. Richards
Sensory-Specific Appetition: Postingestive Detection Of Glucose Rapidly Promotes Continued Consumption Of A Recently Encountered Flavor, Kevin P. Myers, Marisa S. Taddeo, Emily K. Richards
Faculty Journal Articles
It is generally thought that macronutrients stimulate intake when sensed in the mouth (e.g., sweet taste) but as food enters the GI tract its effects become inhibitory, triggering satiation processes leading to meal termination. Here we report experiments extending recent work (see [1]) showing that under some circumstances nutrients sensed in the gut produce a positive feedback effect, immediately promoting continued intake. In one experiment, rats with intragastric (IG) catheters were accustomed to consuming novel flavors in saccharin daily while receiving water infused IG (5 ml/15 min). The very first time glucose (16% w/w) was infused IG instead of water, …
Rats Acquire Stronger Preference For Flavors Consumed Towards The End Of A High-Fat Meal, Kevin P. Myers
Rats Acquire Stronger Preference For Flavors Consumed Towards The End Of A High-Fat Meal, Kevin P. Myers
Faculty Journal Articles
Rats learn to prefer flavors associated with postingestive effects of nutrients. The physiological signals underlying this postingestive reward are unknown. We have previously shown that rats readily learn to prefer a flavor that was consumed early in a multi-flavored meal when glucose is infused intragastrically (IG), suggesting rapid postingestive reward onset. The present experiments investigate the timing of postingestive fat reward, by providing distinctive flavors in the first and second halves of meals accompanied by IG fat infusion. Learning stronger preference for the earlier or later flavor would indicate when the rewarding postingestive effects are sensed. Rats consumed sweetened, calorically-dilute …
Rats Acquire Stronger Preference For Flavors Consumed Towards The End Of A High-Fat Meal, Kevin P. Myers
Rats Acquire Stronger Preference For Flavors Consumed Towards The End Of A High-Fat Meal, Kevin P. Myers
Faculty Journal Articles
Rats learn to prefer flavors associated with postingestive effects of nutrients. The physiological signals underlying this postingestive reward are unknown. We have previously shown that rats readily learn to prefer a flavor that was consumed early in a multi-flavored meal when glucose is infused intragastrically (IG), suggesting rapid postingestive reward onset. The present experiments investigate the timing of postingestive fat reward, by providing distinctive flavors in the first and second halves of meals accompanied by IG fat infusion. Learning stronger preference for the earlier or later flavor would indicate when the rewarding postingestive effects are sensed. Rats consumed sweetened, calorically-dilute …
Common Parietal Activation In Musical Mental Transformations Across Pitch And Time, Nicholas E.V. Foster, Andrea R. Halpern, Robert J. Zatorre
Common Parietal Activation In Musical Mental Transformations Across Pitch And Time, Nicholas E.V. Foster, Andrea R. Halpern, Robert J. Zatorre
Faculty Journal Articles
We previously observed that mental manipulation of the pitch level or temporal organization of melodies results in functional activation in the human intraparietal sulcus (IPS), a region also associated with visuospatial transformation and numerical calculation. Two outstanding questions about these musical transformations are whether pitch and time depend on separate or common processing in IPS, and whether IPS recruitment in melodic tasks varies depending upon the degree of transformation required (as it does in mental rotation). In the present study we sought to answer these questions by applying functional magnetic resonance imaging while musicians performed closely matched mental transposition (pitch …
Investigation Into The Specificity Of Angiotensin Ii-Induced Behavioral Desensitization, Peter J. Vento, Kevin P. Myers, Derek Daniels
Investigation Into The Specificity Of Angiotensin Ii-Induced Behavioral Desensitization, Peter J. Vento, Kevin P. Myers, Derek Daniels
Faculty Journal Articles
Angiotensin II (AngII) plays a key role in maintaining body fluid homeostasis. The physiological and behavioral effects of central AngII include increased blood pressure and fluid intake. In vitro experiments demonstrate that repeated exposure to AngII reduces the efficacy of subsequent AngII, and behavioral studies indicate that prior icv AngII administration reduces the dipsogenic response to AngII administered later. Specifically, rats given a treatment regimen of three icv injections of a large dose of AngII, each separated by 20 min, drink less water in response to a test injection of AngII than do vehicle-treated controls given the same test injection. …
Dementia And Music: Challenges And Future Directions, Andrea R. Halpern
Dementia And Music: Challenges And Future Directions, Andrea R. Halpern
Faculty Journal Articles
No abstract provided.
Contextual Information And Memory For Unfamiliar Tunes In Older And Younger Adults, Samantha A. Deffler, Andrea R. Halpern
Contextual Information And Memory For Unfamiliar Tunes In Older And Younger Adults, Samantha A. Deffler, Andrea R. Halpern
Faculty Journal Articles
We examined age differences in the effectiveness of multiple repetitions and providing associative facts on tune memory. For both tune and fact recognition, three presentations were beneficial. Age was irrelevant in fact recognition, but older adults were less successful than younger in tune recognition. The associative fact did not affect young adults' performance. Among older people, the neutral association harmed performance; the emotional fact mitigated performance back to baseline. Young adults seemed to rely solely on procedural memory, or repetition, to learn tunes. Older adults benefitted by using emotional associative information to counteract memory burdens imposed by neutral associative information.
The Persistence Of Musical Memories: A Descriptive Study Of Earworms, Andrea R. Halpern, James C. Bartlett
The Persistence Of Musical Memories: A Descriptive Study Of Earworms, Andrea R. Halpern, James C. Bartlett
Faculty Journal Articles
We describe some characteristics of persistent musical and verbal retrieval episodes, commonly known as "earworms." In Study 1, participants first filled out a survey summarizing their earworm experiences retrospectively. This was followed by a diary study to document each experience as it happened. Study 2 was an extension of the diary study with a larger sample and a focus on triggering events. Consistent with popular belief, these persistent musical memories were common across people and occurred frequently for most respondents, and were often linked to recent exposure to preferred music. Contrary to popular belief, the large majority of such experiences …
Perception Of Emotion In Sounded And Imagined Music, Brian L. Lucas, Emery Schubert, Andrea R. Halpern
Perception Of Emotion In Sounded And Imagined Music, Brian L. Lucas, Emery Schubert, Andrea R. Halpern
Faculty Journal Articles
WE STUDIED THE EMOTIONAL RESPONSES BY MUSICIANS to familiar classical music excerpts both when the music was sounded, and when it was imagined.We used continuous response methodology to record response profiles for the dimensions of valence and arousal simultaneously and then on the single dimension of emotionality. The response profiles were compared using cross-correlation analysis, and an analysis of responses to musical feature turning points, which isolate instances of change in musical features thought to influence valence and arousal responses. We found strong similarity between the use of an emotionality arousal scale across the stimuli, regardless of condition (imagined …
Mental Reversal Of Imagined Melodies: A Role For The Posterior Parietal Cortex, Robert J. Zatorre, Andrea R. Halpern, Marc Bouffard
Mental Reversal Of Imagined Melodies: A Role For The Posterior Parietal Cortex, Robert J. Zatorre, Andrea R. Halpern, Marc Bouffard
Faculty Journal Articles
Two fMRI experiments explored the neural substrates of a musical imagery task that required manipulation of the imagined sounds: temporal reversal of a melody. Musicians were presented with the first few notes of a familiar tune (Experiment 1) or its title (Experiment 2), followed by a string of notes that was either an exact or an inexact reversal. The task was to judge whether the second string was correct or not by mentally reversing all its notes, thus requiring both maintenance and manipulation of the represented string. Both experiments showed considerable activation of the superior parietal lobe (intraparietal sulcus) during …
Brain Activation During Anticipation Of Sound Sequences, Amber M. Leaver, Jennifer Van Lare, Brandon Zielinski, Andrea R. Halpern, Josef P. Rauschecker
Brain Activation During Anticipation Of Sound Sequences, Amber M. Leaver, Jennifer Van Lare, Brandon Zielinski, Andrea R. Halpern, Josef P. Rauschecker
Faculty Journal Articles
Music consists of sound sequences that require integration over time. As we become familiar with music, associations between notes, melodies, and entire symphonic movements become stronger and more complex. These associations can become so tight that, for example, hearing the end of one album track can elicit a robust image of the upcoming track while anticipating it in total silence. Here, we study this predictive “anticipatory imagery” at various stages throughout learning and investigate activity changes in corresponding neural structures using functional magnetic resonance imaging. Anticipatory imagery (in silence) for highly familiar naturalistic music was accompanied by pronounced activity in …
I Know What I Like: Stability Of Aesthetic Preference In Alzheimer's Disease, Andrea R. Halpern, Jenny Ly, Seth Elkin-Franklin, Margaret G. O'Connor
I Know What I Like: Stability Of Aesthetic Preference In Alzheimer's Disease, Andrea R. Halpern, Jenny Ly, Seth Elkin-Franklin, Margaret G. O'Connor
Faculty Journal Articles
Two studies explored the stability of art preference in patients with Alzheimer’s disease and age-matched control participants. Preferences for three different styles of paintings, displayed on art postcards, were examined over two sessions. Preference for specific paintings differed among individuals but AD and non-AD groups maintained about the same stability in terms of preference judgments across two weeks, even though the AD patients did not have explicit memory for the paintings. We conclude that aesthetic responses can be preserved in the face of cognitive decline. This should encourage caregivers and family to engage in arts appreciation activities with patients, and …
Melody Recognition At Fast And Slow Tempos: Effects Of Age, Experience, And Familiarity, W. Jay Dowling, James C. Bartlett, Andrea R. Halpern, Melinda W. Andrews
Melody Recognition At Fast And Slow Tempos: Effects Of Age, Experience, And Familiarity, W. Jay Dowling, James C. Bartlett, Andrea R. Halpern, Melinda W. Andrews
Faculty Journal Articles
Eighty-one listeners defined by three age ranges (18–30, 31–59, and over 60 years) and three levels of musical experience performed an immediate recognition task requiring the detection of alterations in melodies. On each trial, a brief melody was presented, followed 5 sec later by a test stimulus that either was identical to the target or had two pitches changed, for a same–different judgment. Each melody pair was presented at 0.6 note/sec, 3.0 notes/sec, or 6.0 notes/sec. Performance was better with familiar melodies than with unfamiliar melodies. Overall performance declined slightly with age and improved substantially with increasing experience, in agreement …
Effects Of Timbre And Tempo Change On Memory For Music, Andrea R. Halpern, Daniel Mullensiefen
Effects Of Timbre And Tempo Change On Memory For Music, Andrea R. Halpern, Daniel Mullensiefen
Faculty Journal Articles
We investigated the effects of different encoding tasks and of manipulations of two supposedly surface parameters of music on implicit and explicit memory for tunes. In two experiments, participants were first asked to either categorize instrument or judge familiarity of 40 unfamiliar short tunes. Subsequently, participants were asked to give explicit and implicit memory ratings for a list of 80 tunes, which included 40 previously heard. Half of the 40 previously heard tunes differed in timbre (Experiment 1) or tempo (Experiment 2) in comparison with the first exposure. A third experiment compared similarity ratings of the tunes that varied in …
Behavioral And Neural Correlates Of Perceived And Imagined Musical Timbre, Andrea R. Halpern, Robert J. Zattore, Marc Bouffard, Jennifer A. Johnson
Behavioral And Neural Correlates Of Perceived And Imagined Musical Timbre, Andrea R. Halpern, Robert J. Zattore, Marc Bouffard, Jennifer A. Johnson
Faculty Journal Articles
The generality of findings implicating secondary auditory areas in auditory imagery was tested by using a timbre imagery task with fMRI. Another aim was to test whether activity in supplementary motor area (SMA) seen in prior studies might have been related to subvocalization. Participants with moderate musical background were scanned while making similarity judgments about the timbre of heard or imagined musical instrument sounds. The critical control condition was a visual imagery task. The pattern of judgments in perceived and imagined conditions was similar, suggesting that perception and imagery access similar cognitive representations of timbre. As expected, judgments of heard …
Effects Of Training And Melodic Features On Mode Perception, Amber M. Leaver, Andrea R. Halpern
Effects Of Training And Melodic Features On Mode Perception, Amber M. Leaver, Andrea R. Halpern
Faculty Journal Articles
The two modes most widely used in Western music today convey opposite moods—a distinction that nonmusicians and even young children are able to make. However, the current studies provide evidence that, despite a strong link between mode and affect, mode perception is problematic. Nonmusicians found mode discrimination to be harder than discrimination of other melodic features, and they were not able to accurately classify major and minor melodies with these labels. Although nonmusicians were able to classify major and minor melodies using affective labels, they performed at chance in mode discrimination. Training, in the form of short lessons given to …
Aging And Memory For Music: A Review, Andrea R. Halpern, James C. Bartlett
Aging And Memory For Music: A Review, Andrea R. Halpern, James C. Bartlett
Faculty Journal Articles
People of all ages enjoy listening to music, yet most research in musical development has concentrated on infancy through childhood. Our recent research program examined various aspects of music cognition in younger (ages 18 through 30) and older adults (ages 60 through 80) with varying amounts of musical experience. The studies investigated the independent and combined influences of age and experience on a wide assortment of long and short-term memory tasks. Results showed that some musical tasks reflect the same age-related declines as seen in nonmusical tasks, and musical training does not reduce these age-related declines. In other tasks, experience …
Absolute Pitch And Planum Temporale, Julian P. Keenan, Van Thangaraj, Andrea R. Halpern, Gottfried Schlaug
Absolute Pitch And Planum Temporale, Julian P. Keenan, Van Thangaraj, Andrea R. Halpern, Gottfried Schlaug
Faculty Journal Articles
An increased leftward asymmetry of the planum temporale (PT) in absolute-pitch (AP) musicians has been previously reported, with speculation that early exposure to music influences the degree of PT asymmetry. To test this hypothesis and to determine whether a larger left PT or a smaller right PT actually accounts for the increased overall PT asymmetry in AP musicians, anatomical magnetic resonance images were taken from a right-handed group of 27 AP musicians, 27 nonmusicians, and 22 non-AP musicians. A significantly greater leftward PT asymmetry and a significantly smaller right absolute PT size for the AP musicians compared to the two …
Hearing With The Mind's Eye, Gottfried Schlaug, Chi Chen, Dan Press, Andrea R. Halpern, Aisling Warde, Qun Chen, Alvaro Pascual-Leone
Hearing With The Mind's Eye, Gottfried Schlaug, Chi Chen, Dan Press, Andrea R. Halpern, Aisling Warde, Qun Chen, Alvaro Pascual-Leone
Faculty Journal Articles
No abstract provided.
When That Tune Runs Through Your Head: A Pet Investigation Of Auditory Imagery For Familiar Melodies, Andrea R. Halpern, Robert J. Zatorre
When That Tune Runs Through Your Head: A Pet Investigation Of Auditory Imagery For Familiar Melodies, Andrea R. Halpern, Robert J. Zatorre
Faculty Journal Articles
The present study used positron emission tomography (PET) to examine the cerebral activity pattern associated with auditory imagery forfamiliar tunes. Subjects either imagined the continuation of nonverbaltunes cued by their first few notes, listened to a short sequence of notesas a control task, or listened and then reimagined that short sequence. Subtraction of the activation in the control task from that in the real-tune imagery task revealed primarily right-sided activation in frontal and superior temporal regions, plus supplementary motor area(SMA). Isolating retrieval of the real tunes by subtracting activation in the reimagine task from that in the real-tune imagery task …
Prediction Accuracy Of Young And Middle-Aged Adults In Memory For Familiar And Unfamiliar Texts, Sarah K. Johnson, Andrea R. Halpern
Prediction Accuracy Of Young And Middle-Aged Adults In Memory For Familiar And Unfamiliar Texts, Sarah K. Johnson, Andrea R. Halpern
Faculty Journal Articles
This study investigated the influence of age, familiarity, and level of exposure on the metamemorial skill of prediction accuracy on a future test. Young (17 to 23 years old) and middle-aged adults (35 to 50 years old) were asked to predict their memory for text material. Participants made predictions on a familiar text and an unfamiliar text, at three different levels of exposure to each. The middle-aged adults were superior to the younger adults at predicting performance. This finding indicates that metamemory may increase from youth to middle age. Other findings include superior prediction accuracy for unfamiliar compared to familiar …
Identification Of Speeded And Slowed Familiar Melodies By Younger, Middle-Aged, And Older Musicians And Nonmusicians, Melinda W. Andrews, W. Jay Dowling, James C. Bartlett, Andrea R. Halpern
Identification Of Speeded And Slowed Familiar Melodies By Younger, Middle-Aged, And Older Musicians And Nonmusicians, Melinda W. Andrews, W. Jay Dowling, James C. Bartlett, Andrea R. Halpern
Faculty Journal Articles
There is a range of tempos within which listeners can identify familiar tunes (around 0.8 to 6.0 notes/s). Faster and slower tunes are difficult to identify. The authors assessed fast and slow melody-identification thresholds for 80 listeners ages 17–79 years with expertise varying from musically untrained to professional. On fast-to-slow (FS) trials the tune started at a very fast tempo and slowed until the listener identified it. Slow-to-fast (SF) trials started slow and accelerated. Tunes either retained their natural rhythms or were stylized isochronous versions. Increased expertise led to better performance for both FS and SF thresholds (r = .45). …
Hearing In The Mind's Ear: A Pet Investigation Of Musical Imagery And Perception, Robert J. Zatorre, Andrea R. Halpern, David W. Perry, Ernst Meyer, Alan C. Evans
Hearing In The Mind's Ear: A Pet Investigation Of Musical Imagery And Perception, Robert J. Zatorre, Andrea R. Halpern, David W. Perry, Ernst Meyer, Alan C. Evans
Faculty Journal Articles
Neuropsychological studies have suggested that imagery processes may be mediated by neuronal mechanisms similar to those used in perception. To test this hypothesis, and to explore the neural basis for song imagery, 12 normal subjects were scanned using the water bolus method to measure cerebral blood flow (CBF) during the performance of three tasks. In the control condition subjects saw pairs of words on each trial and judged which word was longer. In the perceptual condition subjects also viewed pairs of words, this time drawn from a familiar song; simultaneously they heard the corresponding song, and their task was to …
The Effects Of Aging And Musical Experience On The Representation Of Tonal Hierarchies, Andrea R. Halpern, Seyeul Kwak, James C. Bartlett, W. Jay Dowling
The Effects Of Aging And Musical Experience On The Representation Of Tonal Hierarchies, Andrea R. Halpern, Seyeul Kwak, James C. Bartlett, W. Jay Dowling
Faculty Journal Articles
Two experiments explored the representation of the tonal hierarchy in Western music among older (aged 60 to 80) and younger (aged 15 to 22) musicians and nonmusicians. A probe tone technique was used: 4 notes from the major triad were presented, followed by 1 note chosen from the 12 notes of the chromatic scale. Whereas musicians had a better sense of the tonal hierarchy than nonmusicians, older adults were no worse than younger adults in differentiating the notes according to musical principles. However, older adults were more prone than younger adults to classify the notes by frequency proximity (pitch height) …
Aging And Experience In The Recognition Of Musical Transpositions, Andrea R. Halpern, J.C. Bartlett, W.J. Dowling
Aging And Experience In The Recognition Of Musical Transpositions, Andrea R. Halpern, J.C. Bartlett, W.J. Dowling
Faculty Journal Articles
The authors examined the effects of age, musical experience, and characteristics of musical stimuli on a melodic short-term memory task in which participants had to recognize whether a tune was an exact transposition of another tune recently presented. Participants were musicians and nonmusicians between ages 18 and 30 or 60 and 80. In 4 experiments, the authors found that age and experience affected different aspects of the task, with experience becoming more influential when interference was provided during the task. Age and experience interacted only weakly, and neither age nor experience influenced the superiority of tonal over atonal materials. Recognition …