It is generally and rightly considered a virtue in a teacher to observe accurately the differences in ability among his pupils, and to discover the direction in which the nature of each particularly inclines him. There is an incredible amount of variability in talent, and the forms of minds are no less varied than the forms of bodies Quintilian (70 A. D. ) There are many good books on Intelligence, such as Cattell's (1971) monumen tal and original contribution, or Matarazzo's (1972) careful and scholarly analy sis, or Butchers (1968) excellent introduction. Other outstanding contributions are mentioned in the course of this volume. This suggests that an author must have a good reason for venturing to offer another tome where so much is already available to satisfy even the most discriminating customer. There is indeed a powerful reason why the time may be ripe for another book on intelli is a very simple one: much has happened in recent years to gence. This reason alter our views on many issues which at one time looked like being closed. Hardly any of these advances have found a place in the books now available, and it seemed desirable to incorporate them in a new text which would be as up to-date as it is possible to be considering the inevitable delays in writing and publishing a textbook.

What is meant by the term "intelligence" and, once de- fined, how do we go about achieving a valid measurement of this faculty? This classic textbook, originally published in 1979, and now reissued with a new preface by Sybil Eysenck, incorporates a broad range of findings and reanalyzes much of the existing literature in this area. In The Structure and Measurement of Intelligence, Hans Eysenck draws on methods for determining the effect of genetics and environment on the development of intelligence and examines the validity of the term as defined in relation to internal as well as external criteria. He tests a number of hypotheses on intelligence against empirical research findings and considers various criticisms in detail. The significance of intelligence and its measurement in society are explored in depth. Eysenck greatly expands upon such questions as: Does IQ measure intelligence? How valid is the nature versus nurture argument? and, How might socioeconomic status influence one's intelligence? Designed primarily for students and scholars in psychology and education, this text will make thought-provoking reading for all concerned with the development and measurement of intelligence in the individual.

This book deals with one aspect of the modern, proof, and the deductions to which they give rise, and scientific study of intelligence, namely its measurement. the social aspect, which is concerned with the "good" or The term, measurement, has difficulties attached to it "evil" consequences which follow from the scientific which rival those attached to the term, intelligence; discovery or invention. Thus IQ testing would appear to many psychologists have little idea of what the word many people to give rise to desirable and "good" conse means, and what are the requirements which must be quences when it enables us to pick out bright "dis fulfilled in order to enable "measurement" to take advantaged" children for higher educational and place. Krantz, Luce, Suppes and Tversky (1971) have university training who would otherwise not have been tried to provide us with an introduction to the "Founda educated up to the level of their ability. On the other tions of Measurement"; these two volumes outline the hand, IQ testing would appear to many people to give background against which attempts to measure intelli rise to undesirable and "bad" consequences when it gence must be evaluated. * No short excerpt or set of enables trade unions to exclude coloured workers by the readings could suffice to bring home to the "innum imposition of unrealistic and irrelevant intellectual erate" reader the implications of scientific measurement, requirements for membership.

It is generally and rightly considered a virtue in a teacher to observe accurately the differences in ability among his pupils, and to discover the direction in which the nature of each particularly inclines him. There is an incredible amount of variability in talent, and the forms of minds are no less varied than the forms of bodies Quintilian (70 A. D. ) There are many good books on Intelligence, such as Cattell's (1971) monumen tal and original contribution, or Matarazzo's (1972) careful and scholarly analy sis, or Butchers (1968) excellent introduction. Other outstanding contributions are mentioned in the course of this volume. This suggests that an author must have a good reason for venturing to offer another tome where so much is already available to satisfy even the most discriminating customer. There is indeed a powerful reason why the time may be ripe for another book on intelli is a very simple one: much has happened in recent years to gence. This reason alter our views on many issues which at one time looked like being closed. Hardly any of these advances have found a place in the books now available, and it seemed desirable to incorporate them in a new text which would be as up to-date as it is possible to be considering the inevitable delays in writing and publishing a textbook.

What is meant by the term "intelligence" and, once de- fined, how do we go about achieving a valid measurement of this faculty? This classic textbook, originally published in 1979, and now reissued with a new preface by Sybil Eysenck, incorporates a broad range of findings and reanalyzes much of the existing literature in this area. In The Structure and Measurement of Intelligence, Hans Eysenck draws on methods for determining the effect of genetics and environment on the development of intelligence and examines the validity of the term as defined in relation to internal as well as external criteria. He tests a number of hypotheses on intelligence against empirical research findings and considers various criticisms in detail. The significance of intelligence and its measurement in society are explored in depth. Eysenck greatly expands upon such questions as: Does IQ measure intelligence? How valid is the nature versus nurture argument? and, How might socioeconomic status influence one's intelligence? Designed primarily for students and scholars in psychology and education, this text will make thought-provoking reading for all concerned with the development and measurement of intelligence in the individual.

This book deals with one aspect of the modern, proof, and the deductions to which they give rise, and scientific study of intelligence, namely its measurement. the social aspect, which is concerned with the "good" or The term, measurement, has difficulties attached to it "evil" consequences which follow from the scientific which rival those attached to the term, intelligence; discovery or invention. Thus IQ testing would appear to many psychologists have little idea of what the word many people to give rise to desirable and "good" conse means, and what are the requirements which must be quences when it enables us to pick out bright "dis fulfilled in order to enable "measurement" to take advantaged" children for higher educational and place. Krantz, Luce, Suppes and Tversky (1971) have university training who would otherwise not have been tried to provide us with an introduction to the "Founda educated up to the level of their ability. On the other tions of Measurement"; these two volumes outline the hand, IQ testing would appear to many people to give background against which attempts to measure intelli rise to undesirable and "bad" consequences when it gence must be evaluated. * No short excerpt or set of enables trade unions to exclude coloured workers by the readings could suffice to bring home to the "innum imposition of unrealistic and irrelevant intellectual erate" reader the implications of scientific measurement, requirements for membership.