Format:
Online-Ressource (vii, 49 p.)
,
ill
,
20 cm
Content:
"Some years ago I felt that it would be a rather simple matter to determine experimentally the relative influences of heredity and environment upon mental performance. This appeared to involve merely a collection of ample data of a sort easily obtainable, and the analysis of such data by prosaic methods. As a beginning it seemed well to examine tentatively all the statistical steps which would arise in the undertaking. The attempt to do so proved disheartening because of the number of difficulties which it revealed. These were both logical and mathematical. To meet the mathematical difficulties certain new measures have been derived. They have been described in full in the December, 1925, issue of the Journal of the American Statistical Association and are used here for the first time in an experimental study. To meet the logical difficulties a number of explicit functional definitions are herein given"--Preface. (PsycINFO Database Record (c) 2010 APA, all rights reserved)
Note:
Electronic reproduction; Washington, D.C; American Psychological Association; 2011; Available via World Wide Web; Access limited by licensing agreement; s2011 dcunns
Language:
English
