“
“With the Ponatinib molecular weight death of Arthur Robert (Art) Jensen on October 22, 2012 the field of differential psychology lost one of its most eminent members. Art was 89 and died in his lake-front home in Kelseyville, California. He had Parkinson’s disease and a number of other ailments. Art’s first publication was a 1955 paper titled “A review of 6 textbooks in Educational Psychology”, and this, like his first empirical article on the topic of authoritarian attitudes and personality maladjustment, offered few clues about

the directions his future research would take. Since these early papers, Art wrote almost 450 publications and 8 books on such diverse topics as the Rorshach, teaching machines, memory and learning abilities, mental retardation, visual evoked potentials, in addition

to his numerous major contributions to such broader areas as intelligence and mental abilities, behavioral genetics, test bias and psychometrics, mental chronometry, race differences, and the g factor. Art was born in San Diego on August 24, 1924. He earned his BA in 1945 at the University of California, Berkeley, an MA in 1952 at San Diego State College, and a PhD in 1956 at Columbia University. Following a 2 year postdoctoral research position at the Institute of Psychiatry at the University of London where he worked closely with Hans Eysenck, Art returned to the United States and took a position in the Department of Educational Psychology at UC Berkeley. Art conducted a considerable amount of research on the topics of learning

and memory DNA Damage inhibitor and this led to his theory of Level I and Level II abilities. Level I referred to associative learning ifoxetine and the use of rote learning to retain information. Level II referred to reasoning and conceptual learning which, at the very least, required some manipulation of information. He stated that a good test of Level I was forward digit span, whereas backward digit span would require Level II. A test such as the Raven Matrices would be a particularly good measure of Level II. Art conducted several studies comparing whites, blacks, and Asians and concluded that Level I abilities occurred equally frequently in all groups but Level II abilities occurred more frequently among Asians and whites than among blacks. In 1969 Art was invited to write a chapter dealing with race differences and compensatory education for the Harvard Educational Review. When he began to read the literature on these topics he, like the majority of psychologists and educators of the time, believed that environmental factors were largely responsible for race differences in ability but by the time he had read all the material he needed to write his chapter, Art had become convinced that it was not unreasonable to hypothesize that genetic differences also made a contribution.