The Cambridge Handbook of Expertise and Expert Performance

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Overview

This handbook provides comprehensive information about expert performance. This handbook provides comprehensive information about expert performance. It describes the processes, knowledge, and methods by which people climb to the highest possible levels of human performance. It highlights the research techniques and approaches that investigators use to gain insights about such extraordinary performance. This handbook provides comprehensive information about expert performance. It describes the processes, knowledge, and methods by which people climb to the highest possible levels of human performance. It highlights the research techniques and approaches that investigators use to gain insights about such extraordinary performance. Fifteen domains are examined in detail by the leading researchers in the field. General issues that cut across most domains are also reviewed in chapters on aspects such as general and practical intelligence, differences in brain activity, self-regulated learning, deliberate practice, aging, and creativity. This is the first handbook where the world's foremost 'experts on expertise' review our scientific knowledge on expertise and expert performance and how experts may differ from non-experts in terms of their development, training, reasoning, knowledge, social support, and innate talent. Methods are described for the study of experts' knowledge and their performance of representative tasks from their domain of expertise. The development of expertise is also studied by retrospective interviews and the daily lives of experts are studied with diaries. In 15 major domains of expertise, the leading researchers summarize our knowledge on the structure and acquisition of expert skill and knowledge and discuss future prospects. General issues that cut across most domains are reviewed in chapters on various aspects of expertise such as general and practical intelligence, differences in brain activity, self-regulated

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Editorial Reviews

From the Publisher
"The Cambridge Handbook of Expertise and Expert Performance makes a rather startling assertion: the trait we commonly call talent is highly overrated. Or, put another way, expert performers "whether in memory or surgery, ballet or computer programming" are nearly always made, not born. And yes, practice does make perfect."
--Steven D. Leavitt and Stephen J. Dubner, The New York Times Magazine and authors of Freakonomics

"This handbook was very much needed in a time when new environments and new roles emerge continually - when new experts must be trained or novel expertise programmed on short notice. Moreover, its organization, depth, and effectiveness of communication make it the ideal source for psychological researchers, trainers and instructional designers, and expert system builders who focus their work on the development of new expertise."
--Alan Lesgold, University of Pittsburgh

"The Cambridge Handbook of Expertise and Expert Performance brings together reviews by distinguished psychologists and computer scientists of the methods and results of studies of expertise. Besides a guide to the literature, the Handbook provides focused essays on experimental, observational, and analytical techniques for the study of expertise in a variety of domains. Policy makers and researchers alike will find this volume useful for years to come."
--Clark Glymour, Carnegie Mellon University

"This book is a comprehensive and thought-provoking presentation of research and theory of expert performance that brings the field up to date since the seminal publications in the early 1980s. There has been much work on expertise, and this handbook is a significant collection edited by eminent people in the field. Readers will be informed about approaches to the study and analysis of expertise. Various fields are considered, including mathematics, history, memory, and chess. A range of mechanisms and issues influencing development are considered, including intelligence, tacit knowledge, deliberate practice, and self-regulation. Case studies are presented of expertise in creative thinking. This book is recommended to researchers and students working in this major field of cognition in highly competent performance."
--Robert Glaser, University of Pittsburgh

"This field of research on expertise has blossomed over the last 30 years. This book has brought together a who's who of research on expertise. Many of these chapters will be my standard references for years to come."
--John R. Anderson, Carnegie Mellon University

"Rarely have I found a handbook so uniformly valuable. That is, The Cambridge Handbook of Expertise and Expert Performance deserves to be read, cover to cover, by all practicing cognitive psychologists, expert system builders who focus their work on the development of new expertise, national policy makers and psychological researchers, and graduate students working in the field of cognitive science. No one will turn its final page without having gained precious information and wisdom that will directly and noticeably improve their practice of expertise and expert performance."
--Clifford Morris

"Many of the chapters of this excellent handbook advocate the idea of becoming an expert is a learning process for which one has to engage in years of deliberate practice. ...This book is suited to academics, parents, educators, trainers, coaches and politicians, or any who foster the development of individuals."
--Remco Polman, The Psychologist

"An excellent review of the role of traits as predictors of expertise is provided, along with an illustration of the role of trait complexes. ....The handbook not only reveals the extensive literature that has been developed over the past few decades but also reveals some of the gaps in our understanding. .... Each of the chapters, in their own way, illustrates a number of worthwhile research topics. .... The editors have truly provided an outstanding volume that has something for students, educators, practitioners, and researchers."
--David J. Schroeder, PsycCritique

"The Handbook is a great reference for anyone interested in personal improvement, including sharpening your financial panache. Reading these research papers will give you a greater understanding and appreciation of what it takes to truly excel at investing or any other human endeavor."
--Anders Bylund

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Product Details

Meet the Author

K. Anders Ericsson is Conradi Eminent Scholar and Professor of Psychology at Florida State University. In 1976 he received his Ph. D. in Psychology from University of Stockholm, Sweden, followed by post-doctoral fellowship at Carnegie-Mellon University. His current research concerns the structure and acquisition of expert performance and in particular how expert performers acquire and maintain their superior performance by extended deliberate practice. He has published many books including Toward a General Theory of Expertise: Prospects and Limits and The Road to Excellence: The Acquisition of Expert Performance in the Arts and Sciences, Sports, and Games.

Neil Charness is Professor of Psychology at Florida State University and Research Associate at the Pepper Institute on Aging and Public Policy. He is also the Director of the Cognitive and Behavioral Sciences area in the department of Psychology at FSU. He has written many articles and chapters on the topics of age, human factors, and expert performance. He is on the editorial board of Gerontechnology, Psychology and Aging and the Journal of Gerontology: Psychological Sciences.

Robert R. Hoffman, Ph.D. is a Research Scientist at the State of Florida Institute for Human and Machine Cognition, which is located in Pensacola. He is also an Adjunct Instructor at the Department of Psychology of the University of West Florida in Pensacola. His research has garnered him a designation as one of the pioneers of Expertise Studies. Hoffman has been recognized on an international level in at least five disciplines - remote sensing, meteorology, experimental psychology, human factors, and artificial intelligence. Within psycholinguistics, he has made pioneering contributions, having founded the journal Metaphor & Symbol, and having written extensively on the theory of analogy. He is co-editor of the Regular Department Human Centered Computing in the journal IEEE: Intelligent Systems.

Paul J. Feltovich is a Research Scientist at the Institute for Human and Machine Cognition, University of West Florida, Pensacola. He has conducted research and published on topics such as expert-novice differences in complex cognitive skills; conceptual understanding and misunderstanding for complex knowledge; and novel means of instruction in complex and ill-structured knowledge domains. Since joining IHMC, he has been investigating coordination, regulation, and teamwork in mixed groups of humans and intelligent software agents. He has authored nearly one hundred professional articles and two books.

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Read an Excerpt


Cambridge University Press
052184097X - The Cambridge handbook of expertise and expert performance - Edited by K. Anders Ericsson, Neil Charness, Paul J. Feltovich and Robert R. Hoffman
Excerpt



Part I

INTRODUCTION AND PERSPECTIVE





Chatper 1

An Introduction to Cambridge Handbook of Expertise and Expert Performance: Its Development, Organization, and Content

K. Anders Ericsson

A significant milestone is reached when a field of scientific research matures to a point warranting publication of its first handbook. A substantial body of empirical findings, distinctive theoretical concepts and frameworks, and a set of new or adapted methods justify a unifying volume. The growth of this field is evident from the publication of a series of edited books on diverse sets of skills and expertise from many domains during the last several decades (Anderson, 1981; Bloom, 1985a; Chase, 1973; Chi, Glaser, & Farr, 1988; Ericsson, 1996a; Ericsson & Smith, 1991a; Feltovich, Ford, & Hoffman, 1997; Hoffman, 1992; Starkes & Allard, 1993; Starkes & Ericsson, 2003). And as in many other fields, the name of a branch of scientific study, in our case expertise and expert performance, often communicates the domain of studied phenomena.

Expert, Expertise, and ExpertPerformance: Dictionary Definitions

Encyclopedias describe an Expert as “one who is very skillful and well-informed in some special field” (Webster’s New World Dictionary, 1968, p. 168), or “someone widely recognized as a reliable source of knowledge, technique, or skill whose judgment is accorded authority and status by the public or his or her peers. Experts have prolonged or intense experience through practice and education in a particular field” (Wikipedia, 2005). Expertise then refers to the characteristics, skills, and knowledge that distinguish experts from novices and less experienced people. In some domains there are objective criteria for finding experts, who are consistently able to exhibit superior performance for representative tasks in a domain. For example, chess masters will almost always win chess games against recreational chess players in chess tournaments, medical specialists are far more likely to diagnose a disease correctly than advanced medical students, and professional musicians can perform pieces of music in a manner that is unattainable for less skilled musicians. These types of superior reproducible performances of representative tasks capture the essence of the respective domains, and authors have been encouraged to refer to them as Expert Performance in this handbook.

   In some domains it is difficult for non-experts to identify experts, and consequently researchers rely on peer-nominations by professionals in the same domain. However, people recognized by their peers as experts do not always display superior performance on domain-related tasks. Sometimes they are no better than novices even on tasks that are central to the expertise, such as selecting stocks with superior future value, treatment of psychotherapy patients, and forecasts (Ericsson & Lehmann, 1996). There are several domains where experts disagree and make inconsistent recommendations for action, such as recommending selling versus buying the same stock. For example, expert auditors’ assessments have been found to differ more from each other than the assessments of less experienced auditors (Bédard, 1991). Furthermore, experts will sometimes acquire differences from novices and other people as a function of their repetitive routines, which is a consequence of their extended experience rather than a cause for their superior performance. For example, medical doctors’ handwriting is less legible than that of other health professionals (Lyons, Payne, McCabe, & Fielder, 1998). Finally, Shanteau (1988) has suggested that “experts” may not need a proven record of performance and can adopt a particular image and project “outward signs of extreme self-confidence” (p. 211) to get clients to listen to them and continue to offer advice after negative outcomes. After all, the experts are nearly always the best qualified to evaluate their own performance and explain the reasons for any deviant outcomes.

   When the proposal for this Handbook was originally prepared, the outline focused more narrowly on the structure and acquisition of highly superior (expert) performance in many different domains (Ericsson, 1996b, 2004). In response to the requests of the reviewers of that proposal, the final outline of the handbook covered a broader field that included research on the development of expertise and how highly experienced individuals accumulate knowledge in their respective domains and eventually become socially recognized experts and masters. Consequently, to reflect the scope of the Handbook it was entitled the Cambridge Handbook of Expertise and Expert Performance. The current handbook thus includes a multitude of conceptions of expertise, including perspectives from education, sociology, and computer science, along with the more numerous perspectives from psychology emphasizing basic abilities, knowledge, and acquired skills. In this introductory chapter, I will briefly introduce some general issues and describe the structure and content of the Handbook as it was approved by Cambridge University Press.

Tracing the Development of Our Knowledge of Expertise and Expert Performance

Since the beginning of Western civilization there has been a particular interest in the superior knowledge that experts have in their domain of expertise. The body of knowledge associated with the domain of expertise in which a person is expert is a particularly important difference between experts and other individuals. Much of this knowledge can be verbally described and shared with others to benefit decision making in the domain and can help educate students and facilitate their progress toward expertise. The special status of the knowledge of experts in their domain of expertise is acknowledged even as far back as the Greek civilization. Socrates said that

I observe that when a decision has to be taken at the state assembly about some matter of building, they send for the builders to give their advice about the buildings, and when it concerns shipbuilding they send for the shipwrights, and similarly in every case where they are dealing with a subject which they think can be learned and taught. But if anyone else tries to give advice, whom they don’t regard as an expert, no matter how handsome or wealthy or well-born he is, they still will have none of him, but jeer at him and create an uproar, until either the would-be speaker is shouted down and gives up of his own accord, or else the police drag him away or put him out on the order of the presidents. (Plato, 1991, pp. 11–12)

   Aristotle relied on his own senses as the primary source of scientific knowledge and sought out beekeepers, fishermen, hunters, and herdsmen to get the best and most reliable information for his books on science (Barnes, 2000). He even tried to explain occasional incorrect reports from some of his informants about how offspring of animals were generated. For example, some of them suggested that “the ravens and the ibises unite at the mouth” (Aristotle, 2000, p. 315). But Aristotle notes: “It is odd, however, that our friends do not reason out how the semen manages to pass through the stomach and arrive in the uterus, in view of the fact that the stomach concocts everything that gets into it, as it does the nourishment” (pp. 315 & 317). Similarly, “those who assert that the female fishes conceive as a result of swallowing the male’s semen have failed to notice certain points” (p. 311). Aristotle explains that “Another point which helps to deceive these people is this. Fish of this sort take only a very short time over their copulation, with the result that many fishermen even never see it happening, for of course no fishermen ever watches this sort of thing for the sake of pure knowledge” (p. 313). Much of Aristotle’s knowledge comes, at least partly, from consensus reports of professionals.

   Much later during the Middle Ages, craftsmen formed guilds to protect themselves from competition. Through arrangements with the mayor and/or monarch they obtained a monopoly on providing particular types of handcraft and services with set quality standards (Epstein, 1991). They passed on their special knowledge of how to produce products, such as lace, barrels, and shoes, to their students (apprentices). Apprentices would typically start at around age 14 and commit to serve and study with their master for around 7 years – the length of time varied depending on the complexity of the craft and the age and prior experience of the apprentice (Epstein, 1991). Once an apprentice had served out their contract they were given a letter of recommendation and were free to work with other masters for pay, which often involved traveling to other cities and towns – they were therefore referred to as journeymen. When a journeyman had accumulated enough additional skill and saved enough money, he, or occasionally she, would often return to his home town to inherit or purchase a shop with tools and apply to become a master of the guild. In most guilds they required inspection of the journeyman’s best work, that is, master pieces, and in some guilds they administered special tests to assess the level of performance (Epstein, 1991). When people were accepted as masters they were held responsible for the quality of the products from their shop and were thereby allowed to take on the training of apprentices (See Amirault & Branson, Chapter 5, and Chi, Chapter 2, on the progression toward expertise and mastery of a domain).

   In a similar manner, the scholars’ guild was established in the 12th and 13th century as “a universitas magistribus et pupillorum,” or “guild of masters and students” (Krause, 1996, p. 9). Influenced by the University of Paris, most universities conducted all instruction in Latin, where the students were initially apprenticed as arts students until they successfully completed the preparatory (undergraduate) program and were admitted to the more advanced programs in medicine, law, or theology. To become a master, the advanced students needed to satisfy “a committee of examiners, then publicly defending a thesis, often in the town square and with local grocers and shoemakers asking questions” (Krause, 1996, p. 10). The goal of the universities was to accumulate and explain knowledge, and in the process masters organized the existing knowledge (See Amirault & Branson, Chapter 5). With the new organization of the existing knowledge of a domain, it was no longer necessary for individuals to discover the relevant knowledge and methods by themselves.

   Today’s experts can rapidly acquire the knowledge originally discovered and accumulated by preceding expert practitioners by enrolling in courses taught by skilled and knowledgeable teachers using specially prepared textbooks. For example, in the 13th century Roger Bacon argued that it would be impossible to master mathematics by the then-known methods of learning (self-study) in less than 30 to 40 years (Singer, 1958). Today the roughly equivalent material (calculus) is taught in highly organized and accessible form in every high school.

   Sir Francis Bacon is generally viewed as one of the architects of the Enlightenment period of Western Civilization and one of the main proponents of the benefits of generating new scientific knowledge. In 1620 he described in his book Novum Organum his proposal for collecting and organizing all existing knowledge to help our civilization engage in learning to develop a better world. In it, he appended a listing of all topics of knowledge to be included in Catalogus Historarium Particularium. It included a long list of skilled crafts, such as “History of weaving, and of ancillary skills associated with it,” “History of dyeing,” “History of leather-working, tanning, and of associated ancillary skills” (Rees & Wakely, 2004, p. 483).

   The guilds guarded their knowledge and their monopoly of production. It is therefore not surprising that the same forces that eventually resulted in the French revolution were directed not only at the oppression by the king and the nobility, but also against the monopoly of services provided by the members of the guilds. Influenced by Sir Francis Bacon’s call for an encyclopedic compilation of human knowledge, Diderot and D’Alembert worked on assembling all available knowledge in the first Encyclopedie(Diderot & D’Alembert, 1966–67), which was originally published in 1751–80.

   Diderot was committed to the creation of comprehensive descriptions of the mechanical arts to make their knowledge available to the public and to encourage research and development in all stages of production and all types of skills, such as tannery, carpentry, glassmaking, and ironworking (Pannabecker, 1994), along with descriptions of how to sharpen a feather for writing with ink, as shown in Figure 1.1. His goal was to describe all the raw materials and tools that were necessary along with the methods of production. Diderot and his associate contributors had considerable difficulties gaining access to all the information because of the unwillingness of the guild members to answer their questions. Diderot even considered sending some of his assistants to become apprentices in the respective skills to gain access to all the relevant information (Pannabecker, 1994). In spite of all the information and pictures (diagrams of tools, workspaces, procedures, etc., as is illustrated in Figure 1.2 showing one of several plates of the process of printing) provided in the Encyclopedie, Diderot was under no illusion that the provided information would by itself allow anyone to become a craftsman in any of the described arts and wrote: “It is handicraft that makes the artist, and it is not in Books that one can learn to manipulate” (Pannabecker, 1994, p. 52). In fact, Diderot did not even address the higher levels of cognitive activity, “such as intuitive knowledge, experimentation, perceptual skills, problem-solving, or the analysis of conflicting or alternative technical approaches” (Pannabecker, 1994, p. 52).

   A couple of years after the French revolution the monopoly of the guilds as eliminated (Fitzsimmons, 2003), including the restrictions on the practice of medicine and law. After the American Revolution and the creation of the United States of America laws were initially created to require that doctors and lawyers be highly trained based on the apprenticeship model, but pressure to eliminate elitist tendencies led to the repeal of those laws. From 1840 to the end of the 19th century there was no requirement for certification to practice medicine and law in the United States (Krause, 1996). However, with time both France and America realized the need to restrict vital medical and legal services to qualified professionals and developed procedures for training and certification.

Figure 1.1 An illustration for how to sharpen a goose feather for writing with ink from Plate Ⅳ in the entry on “Ecriture” in the 23rd volume of Encyclopedie ou dictionnare de raisonne des sciences, des artes et des métier (Diderot & D’Alembert, 1966–67).

Image not available in HTML version

Figure 1.2 An illustration of the workspace of a printer with some of his type elements from Plate Ⅰ in the entry on “Imprimerie” in the 28th volume of Encyclopedie ou dictionnare de raisonne des sciences, des artes et des métier (Diderot & D’Alembert, 1966–67).

Image not available in HTML version

   Over the last couple of centuries there have been several major changes in the relation between master and apprentice. For example, before the middle of the 19th century children of poor families would often be taken on by teachers in exchange for a contractual claim for part of the future dancers’, singers’, or musicians’ earnings as an adult (Rosselli, 1991). Since then the state has gotten more involved in the training of their expert performers, even outside the traditional areas of academia and professional training in medicine, law, business, and engineering. In the late 19th century, public institutions such as the Royal Academy of Music were established to promote the development of very high levels of skill in music to allow native students compete with better trained immigrants (Rohr, 2001). In a similar manner during the latter part of the 20th century, many countries invested in schools and academies for the development of highly skilled athletes for improved success in competitions during the Olympic Games and World Championships (Bloomfield, 2004).

   More generally, over the last century there have been economic developments with public broadcasts of competitions and performances that generate sufficient revenue for a number of domains of expertise, such as sports and chess, to support professional full-time performers as well as coaches, trainers, and teachers. In these new domains, along with the traditional professions, current and past expert performers continue to be the primary teachers at the advanced level (masters), and their professional associations have the responsibility of certifying acceptable performance and the permission to practice. Accordingly, they hold the clout in thus influencing training in professional schools, such as law, medical, nursing, and business schools – “testing is the tail that wags the dog” (Feltovich, personal communication) – as well as continuing education training (see Evetts, Meig, & Felt, Chapter 7 on sociological perspectives on expertise). The accumulation of knowledge about the structure and acquisition of expertise in a given domain, as well as knowledge about the instruction and training of future professionals, has occurred, until quite recently, almost exclusively within each domain with little cross-fertilization of domains in terms of teaching, learning methods, and skill-training techniques.

   It is not immediately apparent what is generalizable across such diverse domains of expertise, such as music, sport, medicine, and chess. What could possibly be shared by the skills of playing difficult pieces by Chopin, running a mile in less than four minutes, and playing chess at a high level? The premise for a field studying expertise and expert performance is that there are sufficient similarities in the theoretical principles mediating the phenomena and the methods for studying them in different domains that it would be possible to propose a general theory of expertise and expert performance. All of these domains of expertise have been created by humans. Thus the accumulated knowledge and skills are likely to reflect similarities in structure that reflect both human biological and psychological factors, as well as cultural factors. This raises many challenging problems for methodologies used to describe the organization of knowledge and mechanisms and reveals the mediating expert performance that generalizes across domains.

   Once we know how experts organize their knowledge and their performance, is it possible to improve the efficiency of learning to reach higher levels of expert performance in these domains? It should also be possible to answer why different individuals improve their performance at different rates and why different people reach very different levels of final achievement. Would a deeper understanding of the development and its mediating mechanisms make it possible to select individuals with unusual potential and to design better developmental environments to increase the proportion of performers who reach the highest levels? Would it be possible even to facilitate the development of those rare individuals who make major creative contributions to their respective domains?

Conceptions of Generalizable Aspects of Expertise

Several different theoretical frameworks have focused on broad issues on attaining expert performance that generalize across different domains of expertise.

Individual Differences in Mental Capacities

A widely accepted theoretical concept argues that general innate mental capacities mediate the attainment of exceptional performance in most domains of expertise. In his famous book, “Heriditary Genius,” Galton (1869/1979) proposed that across a wide range of domains of intellectual activity the same innate factors were required to attain outstanding achievement and the designation of being a genius. He analyzed eminent individuals in many domains in Great Britain and found that these eminent individuals were very often the offspring of a small number of families – with much higher frequency than could be expected by chance. The descendents from these families were much more likely to make eminent contributions in very diverse domains of activity, such as becoming famous politicians, scientists, judges, musicians, painters, and authors. This observation led Galton to suggest that there must be a heritable potential that allows some people to reach an exceptional level in any one of many different domains. After reviewing the evidence that height and body size were heritable Galton (1869/1979) argued: “Now, if this be the case with stature, then it will be true as regards every other physical feature – as circumference of head, size of brain, weight of grey matter, number of brain fibres, &c.; and thence, a step on which no physiologist will hesitate, as regards mental capacity” (pp. 31–32, emphasis added).

   Galton clearly acknowledged the need for training to reach high levels of performance in any domain. However, he argued that improvements are rapid only in the beginning of training and that subsequent increases become increasingly smaller, until “maximal performance becomes a rigidly determinate quantity” (p. 15). Galton developed a number of different mental tests of individual differences in mental capacity. Although he never related these measures to the objective performance of experts on particular real-world tasks, his views led to the common practice of using psychometric tests for admitting students into professional schools and academies for arts and sports with severely limited availability of slots. These tests of basic ability and talent were believed to identify the students with the capacity for reaching the highest levels.

   In the 20th century scientists began the psychometric testing of large groups of experts to measure their powers of mental speed, memory, and intelligence. When the experts’ performance was compared to control groups of comparable education, there was no evidence for Galton’s hypothesis of a general superiority for experts because the demonstrated superiority of experts was found to be limited to specific aspects related to the particular domain of expertise. For example, the superiority of the chess experts’ memory was constrained to regular chess positions and did not generalize to other types of materials (Djakow, Petrowski, & Rudik, 1927). Not even IQ could distinguish the best among chess players (Doll & Mayr, 1987) or the most successful and creative among artists and scientists (Taylor, 1975).

   In a recent review, Ericsson and Lehmann (1996) found that (1) measures of basic mental capacities are not valid predictors of attainment of expert performance in a domain, (2) the superior performance of experts is often very domain specific, and transfer outside their narrow area of expertise is surprisingly limited, and (3) systematic differences between experts and less proficient individuals nearly always reflect attributes acquired by the experts during their lengthy training. The reader is directed to the chapter by Horn and Masunaga (chapter 34) and to comprehensive reviews in Sternberg and Grigorenko, 2003, and Howe, Davidson, and Sloboda. 1998.





© Cambridge University Press
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Table of Contents

Part I. Introduction and Perspective: 1. An introduction to Cambridge handbook of expertise and expert performance: its development, organization, and content; 2. Two approaches to the study of experts' characteristics; 3. Expertise, talent, and social encouragement; Part II. Overview of Approaches to the Study of Expertise - Brief Historical Accounts of Theories and Methods: 4. Studies of expertise from psychological perspectives; 5. Overview of approaches to the study of expertise: brief historical accounts of theories and methods; 6. Expert systems: a perspective from computer science; 7. Professionalization, scientific expertise, and elitism - a sociological perspective; Part III. Methods for Studying the Structure of Expertise: 8. Observation of work practices in natural settings; 9. Methods for studying the structure of expertise: psychometric approaches; 10. Methods to assess the representations of experts' and novices' knowledge; 11. Task analysis; 12. Eliciting and representing the knowledge of experts; 13. Protocol analysis and expert thought: concurrent verbalizations of thinking during experts' performance on representative tasks; 14. Simulation for performance and training; Part IV. Methods for Studying the Acquisition and Maintenance of Expertise: 15. Laboratory studies of training, skill acquisition, and retention of performance; 16. Retrospective interviews in the study of expertise and expert performance; 17. Time budgets, diaries and analyses of concurrent practice activities; 18. Historiometric methods; Part V. Domains of Expertise: A. Professional Domains: 19. Expertise in medicine and surgery; 20. Expertise and transportation; 21. Expertise in software design; 22. Professional writing expertise; 23. Professional judgments and 'naturalistic decision making'; 24. Decision making expertise; 25. The making of a dream team: when expert teams do best; B. Arts, Sports and Motor Skills: 26. Music; 27. Expert performance in sport: a cognitive perspective; 28. Artistic performance: acting, ballet, and contemporary dance; 29. Perceptual-motor expertise; C. Games and Other Types of Expertise: 30. Expertise in chess; 31. Exceptional memory; 32. Mathematical expertise; 33. Expertise in history; Part VI. Generalizable Mechanisms Mediating Expertise and General Issues: 34. A merging theory of expertise and intelligence; 35. Tacit knowledge, practical intelligence and expertise; 36. Situational awareness; 37. Brain changes in the development of expertise: neuroanatomical and neurophysiological evidence about skill-based adaptations; 38. The influence of experience and deliberate practice on the development of superior expert performance; 39. Development and Adaptation of expertise: the role of self-regulatory processes and beliefs; 40. Aging and expertise; 41. Social and sociological factors in the development of expertise; 42. Expertise and creativity.
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