PSY325 Psychology of Expertise. What is an Expert?

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Presentation transcript:

PSY325 Psychology of Expertise

What is an Expert?

Module Convenor Prof. Fernand Gobet Office hours: Thursdays 1 pm – 5 pm ERB 2.57 Current research Psychology of expert behaviour Computer modelling of expert behaviour Computer modelling of the acquisition of language

Aims of Lectures To provide an understanding of the psychological factors underpinning expert performance To describe a wide range of research methods used to study expertise To provide an understanding of the role of experts in society

Readings Textbook Gobet, F. (2015) Understanding expertise. London: Palgrave. VITAL PPT presentations Books in the library ol.ac.uk/lists/EFF9082D- 8D33-5C2C-0B13- 2BA9B6D057A3.html

Articles Expertise/PY3602-Psychology-of-Expertise.html Library: DISCOVER...

Content of Lectures 1. Introduction 2. Perception and memory 3. Problem solving and decision making 4. Learning and education: practice vs. talent 5. Development and aging

6. Creativity 7. Personality and intelligence 8. Gender differences 9. The neuroscience of expertise 10. Broader aspects: sociology, philosophy and artificial intelligence 11. Exam preparation

Evaluation Coursework essay Weighting: 25% 1 question from a choice of 6 questions Unseen written exam (two hours) Weighting: 75% 2 questions from a choice of 6 questions

Definitions of Expertise

The Dual Meaning of “Expertise” Definition of the Oxford Talking Dictionary (1998): Expert opinion or knowledge; know-how, skill, or expertness in something Two essentials aspects: 1. knowledge or even opinion – knowing that 2. skill – knowing how

Expertise as Experience Amount of time an individual has spent in a domain A weak definition Experience does not correlate much with expertise e.g., amateur tennis players Deliberate practice offers a better measure Ericsson et al. (1993)

Expertise Defined by Diplomas e.g. use of PhDs, professional certificates Common definition Diplomas have weaknesses Based on socio-cultural criteria Often do not test “real-life” skills, but declarative knowledge e.g. medecine, psychology Provide little detail about level and nature of expertise

Ecological Measures (I) Measures that are part of the culture of the domain Business – amount of wealth Science – number of citations Writing – number of books sold Socio-cultural biases are possible e.g. fashion, random factors

Ecological Measures (II) Ideal: objective quantitative measure of expert performance within a domain Time to run 100 m This is rare outside sports Rank-ordering systems Belt system in karate FIFA’s ranking of national football teams ATP ranking in tennis These systems have limitations

Ecological Measures (III) Elo rating Elo (1965) Mostly used in chess, but also in table tennis Takes into account outcome of a game (win, loss or draw) skill level of the opponent Updated after every competitive game Provides a precise and up-to-date measure of expertise Explains why much research has been done on chess

Expertise as Replicable Performance in the Laboratory Ericsson and Smith (1991) Chess masters must find good moves in chess problems Medical doctors should find the correct diagnosis A reasonable requirement, at least in some domains But there are exceptions: Developing a new ground-breaking theory in physics Creating a new style in art

Expertise is Acquired… … with effort and intentionally Bereiter and Scardamalia (1993) … without effort and implicitly, through talent Eysenck (1995) Arguably, the way expertise is acquired is not relevant to its definition

Expertise as Fluid Behaviour Behaviour is automatic and requires little conscious control Valid with many types of expertise, but not all The opposite definition has also been proposed: “The expert addresses problems whereas the experienced nonexpert carries out practiced routines” (Bereiter & Scardamalia, 1993) Routine actions hinder the development of expertise (Ericsson et al., 1993)

Expertise as Social Label Label given by Society Group of people Sometimes irrespectively of real competences “Expertise” can only be used within a specific context Stein (1997) Expertise resides both in the expert and a social system

The Definition Used in this Class An expert is somebody who obtains results that are vastly superior to those obtained by the majority of the population Can be applied recursively A “super-expert” is somebody whose performance is vastly superior to the majority of experts Can be applied to “common” domains of expertise language, walking, breathing Can be used with know how and know that

Why Study Expertise?

Studying Expertise… (I) Sheds important light on learning This can lead to better methods of instruction and training in general Can lead to better ways of coaching experts Better methods can have stunning effects e.g. Swimmer Mark Spitz wouldn’t qualify for semi-finals now

Studying Expertise… (II) Can inform the development of artificial expert systems Offers a unique window on human cognition Research on expertise has identified several general cognitive mechanisms role of pattern recognition in decision making progressive deepening selective search Mirror image to neuropsychology Impaired performance vs. amazing performance

Studying Expertise… (III) Emphasises the positive aspects of human psychology Contrary to most psychology, which focuses on negative aspects of human psychology (e.g. pathology) Has anticipated at least some of the claims of positive psychology Seligman and Csikszentmihalyi (2000) Focuses on hope, optimism, strengths and virtues