Speech therapy conversations between five dyads, consisting of senior
speech pathology students and hearing-impaired adolescents enrolled in
a Total Communication programme, were videorecorded for five weekly
sessions. Samples over one-minute intervals at the start, middle, and
end of the sessions were analysed for durations of vocalizations (to the
nearest 0.1 second) and for lengths of utterances (by morphemic counts).
Statistical analyses examined differences between dyads, conversational
partners, sessions, and intervals, and the related interactions. The impli
cations of the outcomes for speech therapy instructionlintervention pro
grammes are discussed.