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2A grade 36 grade advantage AGE AND INITIAL Appendix Buckingham 15 Bureau of Publications cent of expected chronological age Columbia University completely reliable CONARD control group cursive writing difference in favor differences in spelling Educational Psychology Elementary School Journal equated word series equating the groups evaluate experiment EXPERIMENTAL CONTROL Grade experimental factor experimental group favored the control gain in spelling GROUPS MATCHED Handwriting Horace Mann School indicates a difference initial spelling status intelligence quotient Journal of Educational learning of spelling manu manuscript writing Matching shown measure mental age non-taught word series Number Expected Success number of subjects officially taught person-to-person pairing Public School scores script writing shown in Table spelling achievement spelling scales Spelling Spelling Spelling spelling tests statistically reliable style of writing taught word series Teachers College third grade value of manuscript vertical writing Word Per Cent Word Word words taught York City