Document Type



It seems to be relatively well established by such investigators as Jones and Conrad (2), Miles and Miles (4), Lorge (3), Wechsler (5), Weisenberg, Roe and McBride (6), and Foulds and Raven (1), that age does have a differential effect upon various intellectual functions. Whereas this knowledge has already been utilized in the detection of intellectual deterioration, the etiology involved is still somewhat obscure. Various writers, such as Wechsler (5), have implied that the function which withstand the assaults of age best are habitual and informational in character and that those which show the earliest decrements involve problem solving and reasoning abilities. It is thus further implied that functions more largely contingent upon environmental exposure may be damaged very little by advancing age, whereas those depending upon ability to solve relatively unique problems, and thus less dependent upon exposure, may suffer more. This sets the problem and expectation of the present study; it is that functions more environmentally conditioned should be less adversely, or more favorably, affected by age than those more largely genetically conditioned. For purposes of this study, parent-child correlation has been adopted as a measure of degree of genetic conditioning, and test and retest scores over a thirty-year period have been used to reflect the effects of age. It is herein proposed to investigate the relationship between the magnitude of parent-child correlations for the various sub-tests of Army Alpha and the size of the sub-test score differences (1950-1919) over a thirty year period.

Publication Date


Journal Title

Proceedings of the Iowa Academy of Science





First Page


Last Page



©1953 Iowa Academy of Science, Inc.



File Format




To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.