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To the Editor.—The article in the Archives by Arnold et al titled "Prevention by Specific Perceptual Remediation for Vulnerable First-Graders" (34:1279-1294, 1977), which was designed to investigate the effects of perceptual skills training (experimental group) in comparison to reading tutoring and no treatment (control groups) among high-risk children raises serious questions regarding the validity of the authors' conclusions in spite of their statement that the data's "dramatic, clear-cut magnitude and significance allows it to speak for itself." Unfortunately, data do not
Gittelman R. Data Do Not Always Speak for Themselves. Arch Gen Psychiatry. 1978;35(11):1394–1395. doi:10.1001/archpsyc.1978.01770350120013
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