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Raymond Bernard Cattell (20 March 1905 - 2 February 1998) was a British and American psychologist, known for his psychometric research into intrapersonal psychological structure. His work also explored the basic dimensions of personality and temperament, the range of cognitive abilities, the dynamic dimensions of motivation and emotion, the clinical dimensions of abnormal personality, patterns of group syntality and social behavior, applications of personality research to psychotherapy and learning theory, predictors of creativity and achievement, and many multivariate research methods including the refinement of factor analytic methods for exploring and measuring these domains. Cattell authored, co-authored, or edited almost 60 scholarly books, more than 500 research articles, and over 30 standardized psychometric tests, questionnaires, and rating scales. According to a widely cited ranking, Cattell was the 16th most eminent, 7th most cited in the scientific journal literature, and among the most productive, but controversial psychologists of the 20th century.
Cattell noted that in the hard sciences such as chemistry, physics, astronomy, as well as in medical science, unsubstantiated theories were historically widespread until new instruments were developed to improve scientific observation and measurement. In the 1920s, Cattell worked with Charles Spearman who was developing the new statistical technique of factor analysis in his effort to understand the basic dimensions and structure of human abilities. Factor analysis became a powerful tool to help uncover the basic dimensions underlying a confusing array of surface variables within a particular domain. Factor analysis was built upon the earlier development of the correlation coefficient, which provides a numerical estimate of the degree to which variables are "co-related". For example, if "frequency of exercise" and "blood pressure level" were measured on a large group of people, then intercorrelating these two variables would provide a quantitative estimate of the degree to which "exercise" and "blood pressure" are directly related to each other. Factor analysis performs complex calculations on the correlation coefficients among the variables within a particular domain (such as cognitive ability or personality trait constructs) to determine the basic, unitary factors underlying the particular domain. While working at the University of London with Spearman exploring the number and nature of human abilities, Cattell postulated that factor analysis could be applied to other areas beyond the domain of abilities. In particular, Cattell was interested in exploring the basic taxonomic dimensions and structure of human personality. He believed that if exploratory factor analysis were applied to a wide range of measures of interpersonal functioning, the basic dimensions within the domain of social behavior could be identified. Thus, factor analysis could be used to discover the fundamental dimensions underlying the large number of surface behaviors, thereby facilitating more effective research. As noted above, Cattell made many important innovative contributions to factor analytic methodology, including the Scree Test to estimate the optimal number of factors to extract, the "Procrustes" oblique rotation strategy, the Coefficient of Profile Similarity, P-technique factor analysis, dR-technique factor analysis, the Taxonome program, as well the Rotoplot program for attaining maximum simple structure solutions. In addition, many eminent researchers received their grounding in factor analytic methodology under the guidance of Cattell, including Richard Gorsuch, an authority on exploratory factor analytic methods.

What other information do we have on the functionality of Factor analysis?

Factor analysis was built upon the earlier development of the correlation coefficient, which provides a numerical estimate of the degree to which variables

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, Malcolm Denzil Marshall (18 April 1958 - 4 November 1999) was a West Indian cricketer. Primarily a fast bowler, Marshall is regarded as one of the finest and fastest pacemen ever to have played Test cricket. His Test bowling average of 20.94 is the best of anyone who has taken 200 or more wickets. He achieved his bowling success despite being, by the standards of other fast bowlers, a short man - he stood at 5 feet 11 inches (1.80 m), while most of the great quicks have been well above 6 feet (1.8 m) and many great West Indian fast bowlers, such as Joel Garner, Curtly Ambrose and Courtney Walsh, were 6 feet 6 inches (1.98 m) or above.
Marshall made his Test debut in the Second Test at Bangalore on 15 December 1978. He immediately developed a career-long antipathy to Dilip Vengsarkar due to his aggressive appealing. Despite doing little of note in the three Tests he played on that tour, he did take 37 wickets in all first-class games, and Hampshire saw enough in him to take him on as their overseas player for 1979, remaining with the county until 1993. He was in West Indies' World Cup squad, but did not play a match in the tournament. Hampshire were not doing well at the time, but nevertheless he took 47 first-class wickets, as well as picking up 5-13 against Glamorgan in the John Player League. Marshall came to prominence in 1980, when in the third Test at Old Trafford he accounted for Mike Gatting, Brian Rose and Peter Willey in short order to spark an England collapse, although the match was eventually drawn despite Marshall taking 7-24. After 1980/81 he was out of the Test side for two years, but an excellent 1982 season when he took 134 wickets at under 16 apiece, including a career-best 8-71 against Worcestershire, saw him recalled and thereafter he remained a fixture until the end of his international career. In seven successive Test series from 1982/83 to 1985/86 he took 21 or more wickets each time, in the last five of them averaging under 20. His most productive series in this period was the 1983/84 rubber against India, when he claimed 33 wickets as well as averaging 34 with the bat and making his highest Test score of 92 at Kanpur. A few months later he took five in an innings twice at home against Australia. At the peak of his career, he turned down an offer of US$1 million to join a rebel West Indies team on a tour to South Africa, still suffering international sporting isolation due to apartheid.

what was his international debut
Test debut in the Second Test at Bangalore on 15 December 1978.