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RESEARCH NOTE: A LEARNING DISABILITY INDEX (LDI) DERIVED FROM THE WISC‐R: AGE DIFFERENCES IN REFERRED CHILDREN
Author(s) -
Tittemore J. A.,
Lawson J. S.,
Inglis James
Publication year - 1987
Publication title -
journal of child psychology and psychiatry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.652
H-Index - 211
eISSN - 1469-7610
pISSN - 0021-9630
DOI - 10.1111/j.1469-7610.1987.tb00661.x
Subject(s) - psychology , normative , developmental psychology , test (biology) , learning disability , wechsler intelligence scale for children , index (typography) , population , intelligence quotient , nonverbal communication , clinical psychology , cognition , demography , psychiatry , paleontology , philosophy , epistemology , sociology , world wide web , computer science , biology
A learning disability index (LDI) based on a principal components analysis of the WISC‐R normative data has been developed to depict verbal or nonverbal deficits on that test. This index was calculated far the individual test performance of a total of 1371 children referred to a school‐board psychology service because of educational difficulties These children, categorised by sex and age, returned mean scores on this index that were reliably different from the scores of the normative population only after the age of 8 years in the case of the boys, and 7 years in the girls. This cross‐sectional age effect was confirmed by longitudinal data obtained from the test‐retest scores of a subset of these children.