A Phonographic Scale for the Measurement of Defective Articulation

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Abstract
A selection containing all English sounds and most consonant blends was read by 8 children with speech defects, varying from completely unintelligible speech to normal, and studied by 10 adults. Deficiencies in the expt. were corrected in a 2d series of 10 recorded samples, judged by 131-192 observers. It was possible to rank these samples in a scale. The scale can then be used to measure the intelligibility and seriousness of any articulatory defect by comparing an individual case with the phonographic sample.

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