Sequence Memory in Music Performance

Abstract— How do people remember and produce complex sequences like music or speech? Music provides an example of excellent sequence memory under fast performance conditions; novices as well as skilled musicians can perform memorized music rapidly, without making mistakes. In addition, musical pitches repeat often within a melodic sequence in different orders, yet people do not confuse the sequential ordering; temporal properties of musical pitches aid sequence memory. I describe a contextual model of sequence memory that is sensitive to the rate at which musical sequences are produced and to individual differences among performers. Age and musical experience differentiate adults' and children's memory for musical sequences during performance. Performers' memory for the sequential structure of one melody transfers or generalizes to other melodies in terms of the sequence of pitch events, their temporal properties, and their movements. Motion-analysis techniques provide further views of the time course of the cognitive processes that make sequence memory for music so accurate.     

An Alternative Model of Political Reasoning

The primary instrument of dispute management in political liberalism is a form of political thinking and talking that tries to reconcile opposed positions with an impartial settlement based on fair arrangements and mutual respect, one that is careful to treat rival views equitably, and reasoned through from start to finish with open methods that lead to a public justification understandable to the disputants. But this model of reasoning is notoriously deficient in resolving disputes among radically different communities. A more effective form of political reasoning for these disputes that yet respects the background values of liberalism is found in the languages of state depicted in realist accounts of international relations. These languages avoid liberal appeals to be reasonable, reciprocity controlled by moral criteria, and the quest for common reasons. They represent a deliberative search for an accord that will meet the interests of the disputing parties as they define these interests and understand the settlements, and in this sense are welcome models to manage divisive issues in pluralist democracies. A complete version of political reasoning would contain both liberal and realpolitik models and a mechanism to adjudicate the appropriate uses of each model.I do not know how even to begin thanking my spring 2003 graduate seminar for the wonderful discussions that allowed me to refine my thinking on this research project. In different ways the following individual members of the seminar were helpful: Amanda Dipaolo, Dimitria Gatzia, Michael McFall, Michael McKeon, Roald Nashi, Paul Prescott, Joshua Vermette, Amy Widestrom, and the two regular auditors, Cyril Ghosh and Darrell Driver. I have also profited from numerous discussions with other graduate students, including, early in this project, Steven Benko and, more constantly, Ali Shomali. Faculty colleagues who have commented on the work and suggested literatures for me to read and references to track include James Bennett, Hans Schmidt, Peg Hermann, Elizabeth Cohen, Jim Watts, Jim Wiggins, David Miller and Thomas Green. I am particularly grateful to Everita Silina, a graduate student who has been a constant friend and invaluable research assistant for the past five years. The Miami International Relations Theory group provided a critical venue to try out portions of this paper at the University of Miami campus on April 23, 2004. I then presented a later version of the paper to a Philosophy Department colloquium at the University of Miami on April 22, 2005. The comments made by those who attended one or both of the sessions were very helpful. I am also grateful to Ken Baynes and Ned McClennen for allowing me to be an unlisted third instructor in their seminar on “law, economics and public reason” in the fall semester 2004 at Syracuse University, and for the opportunity to present some of this work at one of the seminar meetings. If anything demonstrates the importance of a good collective setting on intellectual work this seminar was one such demonstration.     

Explicit Awareness does not Modulate Retrograde Interference Effects in Sequence Learning

Motor sequences are learned explicitly or implicitly based on conscious awareness of the sequence. Interference happens when two sequences are learned successively. Here, we aimed to determine whether implicit and explicit sequence learning are affected differently by retrograde interference. Young healthy volunteers participated in either a control or interference group and either an explicit or implicit learning condition. We used a modified serial reaction time task to induce sequence learning and control awareness. Results showed that the overall amount of sequence learning was greater in the explicit condition compared to implicit. However, sequence learning was equally susceptible to retrograde interference under either condition. We conclude that although susceptible to interference, explicit awareness improves overall sequence learning compared to implicit conditions.     

国家卫生财政政策补助对象的顺序选择

论述了国家卫生财政政策补助对象的选择问题,公共卫生服务物品提供机构与医疗服务物品提供机构之间的选择、医疗机构与患者之间的选择、公共卫生服务物品提供机构与居民之间的选择以及医疗机构与医生之间的选择,提出了卫生财政政策补助对象的选择顺序,公共卫生服务物品生产和分配机构,医疗保障机构,患者,医生,医疗机构。     

片段再认任务在内隐序列学习研究中的有效性检验

内隐序列学习到底能习得何种知识呢？已有研究从任务分离范式发展到加工分离程序试图来捕获习得的知识。本研究根据信号检测论原理把三元素再认测验的成绩离析成击中率和虚报率, 再试图运用加工分离程序的思想来分离习得的意识知识和无意识知识, 为示区别将这种测验命名为片段再认任务, 并以序列生成任务为效标, 通过两个实验来检验片段再认任务的效度和敏感性。实验1以反应–刺激间隔(RSI)为自变量来检验片段再认任务和序列生成任务在测量习得知识上的效度, 结果显示前者的效度高于后者; 实验2进行测验的敏感性分析, 以参与度为自变量, 结果表明前者更为灵敏所以测量效度高。总之, 与序列生成任务相比, 片段再认任务是一种高效而灵敏的测量工具。     

Implementation of Belief Change Operators Using BDDs

While the theory of belief change has attracted a lot of interest from researchers, work on implementing belief change and actually putting it to use in real-world problems is still scarce. In this paper, we present an implementation of propositional belief change using Binary Decision Diagrams. Upper complexity bounds for the algorithm are presented and discussed. The approach is presented both in the general case, as well as on specific belief change operators from the literature. In an effort to gain a better understanding of the empirical efficiency of the algorithms involved, a fault diagnosis problem on combinational circuits is presented, implemented and evaluated.     

效应器在动作序列学习中的作用机制探析

动作序列学习是动作技能学习的重要组成部分,其中大部分动作序列学习都有效应器参与。目前有关效应器在动作序列学习中的作用机制存在两种观点：一是依存于效应器的观点,即动作序列技能的获得依附于具体的效应器,不可向其他效应器迁移,其学习的本质是建立反应或肌肉间的联结。二是独立于效应器的观点,即动作序列技能的获得并不依存于具体效应器,某个效应器获得的技能可以向其他效应器迁移,其学习的本质是建立抽象的刺激表征联结。效应器作用机制随练习程度、意识状态及其他条件的不同而有所变化。     

RESPONSE ACQUISITION BY HUMANS WITH DELAYED REINFORCEMENT

The present experiment examined whether a response class was acquired by humans with delayed reinforcement. Eight white circles were presented on a computer touch screen. If the undergraduates touched two of the eight circles in a specified sequence (i.e., touching first the upper‐left circle then the bottom‐left circle), then the touches initiated an unsignaled resetting delay culminating in point delivery. Participants experienced one of three different delays (0 s, 10 s, or 30 s). Rates of the target two‐response sequence were higher with delayed reinforcement than with no reinforcement. Terminal rates of the target sequence decreased and postreinforcement pauses increased as a function of delay duration. Other undergraduates exposed to yoked schedules of response‐independent point deliveries failed to acquire the sequence. The results demonstrate that a response class was acquired with delayed reinforcement, extending the generality of this phenomenon found with nonhuman animals to humans.     

Phrasal Unit Boundaries and Organization of Turns and Sequences in Korean Conversation

This paper examines an aspect of the grammar-interaction interface with respect to how participants orient to intra-turn phrasal unit boundaries as a locus that has interactional import for turn and sequence organization in Korean conversation. Phrasal unit boundaries in Korean serve as a space within a turn in which the speaker of the turn in-progress invites the recipient to acknowledge the speaker's point expressed up-to-that-point and collaboratively display his/her understanding thereof. In a sequentially and topically 'ripe' context, such unit boundaries often constitute places where more active participation on the part of the recipient is invited in the form of collaborative completion in which the recipient co-constructs the primary speaker's on-going turn. Phrasal unit boundaries also provide interactional resources which the speaker may exploit to sequentially delete out a problem in talk, e.g., by a sort of tying operation in which a subsequently added phrasal unit ties back to the speaker's previous utterance to the effect that the intervening talk containing a problem is canceled out by way of being shown to have been an interruption of the speaker's turn in-progress. This practice points to an aspect of the way in which the 'agglutinative' grammatical process involving the use of phrasal units shapes interactional patterns as observed in the course of organizing turns/sequences and managing problems in talk.     

Honeybee Memory: Navigation by Associative Grouping and Recall of Visual Stimuli

Studies of navigation in bees and ants are beginning to reveal that foraging insects traveling repeatedly to a food source navigate by using a series of visual images of the environment acquired en route (Collett, 1996; Collett et al., 1993; Judd & Collett, 1998; Wehner et al., 1990, 1996). By comparing the currently viewed scene with the appropriate stored image, the insect is able to ascertain whether or not it is on the correct path and make any necessary corrections. If a bee happens to forage at more than one site, then she needs not only to memorize a separate set of images for each route that she has learned but also to retrieve the set of images that is appropriate to each route. Here we examine the bee's capacity to learn and later retrieve from memory two different sets of visual stimuli. Bees were trained to fly through a compound Y-maze where they were presented alternately with two different sequences of visual stimuli on their route to a food reward. We find that bees can indeed store two different sequences of images simultaneously. Furthermore, the trained bees are able to classify the memorized images into two groups, one pertaining to each three-stimulus set. Exposure to any of the images pertaining to one set triggers recall of all of the other images associated with that set. Associative grouping and recall of visual stimuli, demonstrated here for the first time in honeybees, provide an effective means of retrieving the appropriate navigational information from memory.