The article presents an evaluation of the recently revised Columbia Mental Maturity Scale (CMMS), in hearing and speech clinic setting. Forty-five Revised Stanford Binet and CMMS records of children aged from 3.41 to 14.58 years were selected. The following diagnoses were assigned to the children following extensive diagnostic evaluation: articulation disorders, mental retardation, delayed speech, cleft palate and hard of hearing. It was found that the CMMS does not require the utilization of language nor does it involve to any degree manual dexterity.