From the EDITOR'S PREFACE
Progress in mental testing has been greatly reduced, as all workers in that field are well aware, because of lack of standardization both with respect to the methods of administering tests and also with respect to the methods of scoring them. Closely allied with these lacks is the further lack of adequate norms of performance, gathered from a sufficient number of cases to indicate not merely the average performance but also the entire range of performance as conditioned by age, sex, school training and what other factors may be influential.
The present monograph supplies these desired data for a single test—the Healy Picture Completion Test. By applying it to over 1500 children the authors have been able to arrive at an empirically determined method of scoring, to establish norms of percentile i distribution for each age from 6 to 14 and incidentally to ascertain the connections between performance in it and sex, social environment and school standing.
Work of this sort is directly valuable to all persons who make use of mental tests with children and it is equally valuable to those who are interested in the technique of standardizing tests and in working out by empirical methods the best rules for administering and scoring them.
