@inbook {Scherer1980, title = {The functions of nonverbal signs in conversation}, booktitle = {The Social and Psychological Contexts~of~Language}, year = {1980}, pages = {225{\textendash}244}, publisher = {Lawrence Erlbaum}, organization = {Lawrence Erlbaum}, address = {Hillsdale. NJ}, author = {Scherer, Klaus R}, editor = {Robert Saint Clair and Howard Giles} }