Types
Interpersonal communication and public speaking are the two basic types of verbal communication. Whereas public speaking involves one or more people delivering a message to a group, interpersonal communication generally refers to a two-way exchange that involves both talking and listening.
According to Robert M. Krauss, professor of psychology at Columbia University, signs and symbols are the major signals that make up verbal communication. Words act as symbols, and signs are secondary products of the underlying message and include things like tone of voice, blushing and facial expressions.