Speech and Language: Volume 6, Advances in Basic Research and Practice is a collection of papers that discusses pathology, theories, and clinical issues related to language and speech. Some papers describe auditory discrimination and intervention techniques for articulatory defects, assessment of auditory disorders, phonological systems of deaf speakers, as well as speech and language characteristics of aging persons. Other papers discuss issues in language and cognitive assessment of black children, distortions of the supralaryngeal vocal tract, the structure of the human tongue, transformation of the acoustic signal into speech, and methods to estimate glottal volume velocity waveform properties. One paper suggests guidelines that investigators should be aware of before giving any speech discriminating tests. These guidelines include the following: use of age appropriate tests, use of culturally unbiased tests, adaption of intrapersonal testing procedures, and utilization of recorded stimulus presentation. Another paper reviews auditory processing deficits associated with brain damage and the considerations applicable to the assessment of such disorders. It also suggests treatment planning. One paper concludes that the phonological structure of a fluent speech requires that the listener employ higher level sources of knowledge while making phonetic decisions. Linguists, speech pathologists., psychologists, speech therapists, neurologists, neuropsychologists, and neurolinguists will find the collection highly relevant.