1. A reference marked with an asterisk was one of the fourteen publications selected for analysis because they either 1) referred explicitly to meaning, or 2) were interpreted as related to meaning.)
2. *Cook, S. W., & Skinner, B. F. (1939). Some factors influencing the distribution of associated words. The Psychological Record, 3, 178–184.
3. Critchfield, T. S., Buskist, W. F., & Saville, B. (2000). Whither the muse: What influences empirical research on verbal behavior? The Analysis of Verbal Behavior, 17, 179–190.
4. Critchfield, T. S., Buskist, W. F., Saville, B., Crockett, J., Sherburne, T, & Keel, K. (2000). Sources cited most frequently in the experimental analysis of behavior. The Behavior Analyst, 23, 255–266.
5. Knapp, T. J. (1980). Beyond verbal behavior. Behaviorism, 8, 187–194.