Karl Gustav Jöreskog (born 25 April 1935) is a

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

statistician A statistician is a person who works with theoretical or applied statistics. The profession exists in both the private and public sectors. It is common to combine statistical knowledge with expertise in other subjects, and statisticians may wor ...

. Jöreskog is a Professor Emeritus at

Uppsala University Uppsala University ( sv, Uppsala universitet) is a public university, public research university in Uppsala, Sweden. Founded in 1477, it is the List of universities in Sweden, oldest university in Sweden and the Nordic countries still in opera ...

, and a co-author (with Dag Sörbom) of the

LISREL LISREL (linear structural relations) is a proprietary statistical software package used in structural equation modeling (SEM) for manifest and latent variables. It requires a "fairly high level of statistical sophistication". History LISREL was ...

statistical program. He is also a member of the

Royal Swedish Academy of Sciences The Royal Swedish Academy of Sciences ( sv, Kungliga Vetenskapsakademien) is one of the Swedish Royal Academies, royal academies of Sweden. Founded on 2 June 1739, it is an independent, non-governmental scientific organization that takes special ...

. Jöreskog received his bachelor's, master's, and doctoral degrees in

. He is also a former student of Herman Wold. He was a statistician at Educational Testing Service (ETS) and a visiting professor at

Princeton University Princeton University is a private university, private research university in Princeton, New Jersey. Founded in 1746 in Elizabeth, New Jersey, Elizabeth as the College of New Jersey, Princeton is the List of Colonial Colleges, fourth-oldest ins ...

Research

Jöreskog proposed a reliable numerical method for computing

maximum-likelihood In statistics, maximum likelihood estimation (MLE) is a method of estimating the parameters of an assumed probability distribution, given some observed data. This is achieved by maximizing a likelihood function so that, under the assumed stati ...

estimates in

factor analysis Factor analysis is a statistical method used to describe variability among observed, correlated variables in terms of a potentially lower number of unobserved variables called factors. For example, it is possible that variations in six observed ...

; similarly reliable methods were also proposed by Gerhard Derflinger, Robert Jennrich, and Stephen M. Robinson at roughly the same time. Jöreskog's Fortran codes helped to popularize factor analysis around the world. While working at the

Educational Testing Service Educational Testing Service (ETS), founded in 1947, is the world's largest private nonprofit educational testing and assessment organization. It is headquartered in Lawrence Township, New Jersey, but has a Princeton address. ETS develops var ...

and giving lectures at Princeton University, Jöreskog proposed a linear model for the analysis of covariance structures, a fundamental contribution to structural equation modeling (SEM). His other research interests include

multivariate analysis Multivariate statistics is a subdivision of statistics encompassing the simultaneous observation and analysis of more than one outcome variable. Multivariate statistics concerns understanding the different aims and background of each of the dif ...

item response theory In psychometrics, item response theory (IRT) (also known as latent trait theory, strong true score theory, or modern mental test theory) is a paradigm for the design, analysis, and scoring of tests, questionnaires, and similar instruments measuring ...

, statistical computing, and factor-analysis in

geology Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Ear ...

Awards

*In 1974 he was elected as a

Fellow of the American Statistical Association Like many other academic professional societies, the American Statistical Association (ASA) uses the title of Fellow of the American Statistical Association as its highest honorary grade of membership. The number of new fellows per year is limited ...

. *In 2007 Jöreskog received the Award for distinguished scientific applications of psychology from the

American Psychological Association The American Psychological Association (APA) is the largest scientific and professional organization of psychologists in the United States, with over 133,000 members, including scientists, educators, clinicians, consultants, and students. It ha ...

(APA). *In 2004 he was awarded

The Rudbeck Medal ''The'' () is a grammatical Article (grammar), article in English language, English, denoting persons or things already mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite ...

The Rudbeck Medal
/ref> by Uppsala University.

Selected bibliography

*Jöreskog, K. G. (1969). A general approach to confirmatory maximum likelihood factor analysis. ''Psychometrika, 34,'' 183–202. * ** Reprinted as * *Jöreskog, K. G., & Sörbom, D. (1979). ''Advances in factor analysis and structural equation models.'' New York: University Press of America. *Jöreskog, K. G., & Moustaki, I. (2001). Factor analysis of ordinal variables: A comparison of three approaches. ''Multivariate Behavioral Research, 36,'' 347–387. *Jöreskog, K. G., Olsson, Ulf H., & Wallentin, Fan Y. (2016). Multivariate Analysis with LISREL. Springer International Publishing AG. .

Festschrift

*Cudeck, R., Jöreskog, K. G., Du Toit, S. H. C., & Sörbom, D. (2001). ''Structural Equation Modeling: Present and Future : a Festschrift in Honor of Karl Jöreskog''. Scientific Software International.

Notes

External links