In the fall of 2003, the authors corresponded on the topic of private events on the listserv of the Verbal Behavior Special Interest Group. Extracts from that correspondence raised questions about the role of response amplitude in determining units of analysis, whether private events can be investigated directly, and whether covert behavior…

First-grade boys (N=260) were classified according to response style on a continuum of reflectivity-impulsivity using Kagan's Matching Familiar Figures Test. For all groups, performances were poorest under reward conditions and better under the punishment and reward plus punishment conditions. (ST)

In Skinner's analysis of verbal behavior, three categories of environmental control over instances of verbal behavior appear to be relevant to the study of infant vocal development: the mand, the tact, and the echoic categories. Procedures used in the remediation of language deficiencies and procedures found in work in the area of language…