Seven papers report on speech language pathology and audiology studies performed by graduate students. The first paper reports on intelligibility of two popular synthetic speech systems used in communication aids for the speech impaired, the Votrax Personal Speech System and the Echo II synthesizer. The second paper reports facilitation of tense discrimination by adding semantic redundancy to written sentences of an aphasic 75-year-old. The third study examined the relationship between Black English dialect and articulation disorders. An assessment of the directional microphone hearing aid in the clinical setting is followed by an investigation of the middle latency response measuring auditory sensitivity in adults with normal and impaired hearing. The sixth paper presents findings of an investigation of mother-child interactions with a language disordered child; qualitative and quantitative differences in the mother and clinician dyads were noted. The final study suggested that the communication problems of learning disabled children may be the result of an interaction involving cognitive, social, and linguistic deficits. An index to the contents of the first 11 volumes of working papers is included. (CL)