Published form-board age norms differ markedly across investigators, yielding discrepant diagnoses¶

Claim · All claims
Evidence · 1 study · associational r2 · q2
Currency · newest study 1915 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? The average difference between the author's norms and Goddard's is 4.4 seconds for ages 5 to 12, and between his norms and Sylvester's, 5.6 seconds for ages 4 to 12, so diagnoses differ according to which norms are used. → Wallin 1915

Evidence¶

Wallin 1915¶

Wallin, J. E. W. (1915). Age Norms of Psycho-Motor Capacity. The Journal of Educational Psychology. https://search.worldcat.org/search?q=Age+Norms+of+Psycho-Motor+Capacity

q2 · i? · associational · r2

Comparison of the author's norms with Goddard's and Sylvester's published norms (see Graph I). The author reports average differences of 4.4 sec and 5.6 sec and states that "wholly discrepant diagnoses will be made" depending on the norms used.

"The average difference between my norms and <3oddard's amounts to 4.4 sec. for ages 5 to 12, and between my norms and Sylvester's, 5.G sec. for ages 4 to 12. It is evident that wholly discrepant diagnoses will be made according as the individual is rated by Goddard's, Sylvester's or my norms."

Discussion¶

Related Claims¶

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