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Author |
Noy, L.; Weiser, N.; Friedman, J. |
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Title |
Synchrony in Joint Action Is Directed by Each Participant's Motor Control System |
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Journal Article |
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Year |
2017 |
Publication |
Frontiers in Psychology |
Abbreviated Journal |
Front. Psychol. |
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8 |
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531 |
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Keywords |
visuomotor tracking; mirror game; intermittent control; joint action; motor control |
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Abstract |
In this work, we ask how the probability of achieving synchrony in joint action is affected by the choice of motion parameters of each individual. We use the mirror game paradigm to study how changes in leader�s motion parameters, specifically frequency and peak velocity, affect the probability of entering the state of co-confidence (CC) motion: a dyadic state of synchronized, smooth and co-predictive motions. In order to systematically study this question, we used a one-person version of the mirror game, where the participant mirrored piece-wise rhythmic movements produced by a computer on a graphics tablet. We systematically varied the frequency and peak velocity of the movements to determine how these parameters affect the likelihood of synchronized joint action. To assess synchrony in the mirror game we used the previously developed marker of co-confident (CC) motions: smooth, jitter-less and synchronized motions indicative of co-predicative control. We found that when mirroring movements with low frequencies (i.e., long duration movements), the participants never showed CC, and as the frequency of the stimuli increased, the probability of observing CC also increased. This finding is discussed in the framework of motor control studies showing an upper limit on the duration of smooth motion. We confirmed the relationship between motion parameters and the probability to perform CC with three sets of data of open-ended two-player mirror games. These findings demonstrate that when performing movements together, there are optimal movement frequencies to use in order to maximize the possibility of entering a state of synchronized joint action. It also shows that the ability to perform synchronized joint action is constrained by the properties of our motor control systems. |
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Author |
Geller, N.; Moringen, A.; Friedman, J. |
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Title |
Learning juggling by gradually increasing difficulty vs. learning the complete skill results in different learning patterns |
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Journal Article |
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Year |
2023 |
Publication |
Frontiers in Psychology |
Abbreviated Journal |
Front Psychol |
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14 |
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1284053 |
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Keywords |
coordination; difficulty; juggling; learning strategies; motor learning |
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Motor learning is central to sports, medicine, and other health professions as it entails learning through practice. To achieve proficiency in a complex motor task, many hours of practice are required. Therefore, finding ways to speed up the learning process is important. This study examines the impact of different training approaches on learning three-ball cascade juggling. Participants were assigned to one of two groups: practicing by gradually increasing difficulty and elements of the juggling movement (“learning in parts”) or training on the complete skill from the start (“all-at-once”). Results revealed that although the all-at-once group in the early stages of learning showed greater improvement in performance, the “learning in parts” group managed to catch up, even over a relatively short period of time. The lack of difference in performance between the groups at the end of the training session suggests that the choice of training regime (between all-at-once and learning in parts), at least in the short term, can be selected based on other factors such as the learner's preference, practical considerations, and cognitive style. |
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Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel |
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1664-1078 |
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PMID:38022928; PMCID:PMC10679398 |
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120 |
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