Abstract: A system for analyzing conversations or speech, especially “turns” (a point in time in a person's or an animal's talk when another may or does speak) comprises a computer (100) with a memory (105), at least one microphone (115, 120), and software (110) running in the computer. The system is arranged to recognize and quantify utterances including spoken words, pauses between words, in-breaths, vowel extensions, and the like, and to recognize questions and sentences. The system rapidly and efficiently quantifies and qualifies speech and thus offers substantial improvement over prior-art computerized response systems that use traditional linguistic approaches that depend on single words or a small number of words in grammatical sentences as a basic unit of analysis. The system and method are useful in many applications, including teaching colloquial use of turn-taking, and in forensic linguistics.