1. Bitgood, S. C., Segrave, K., & Jenkins, H. M. (1976). Verbal feedback and the feature-positive effect in children. Journal of Experimental Child Psychology, 21, 249–255.
2. Hearst, E. (1978). Stimulus relationships and feature selection in learning and behavior. In S. Hulse, H. Fowler, & W. K. Honig (Eds.), Cognitive processes in animal behavior (pp. 51-88). Hillsdale, NJ: Erlbaum.
3. Hearst, E. (1984). Absence as information: Some implications for learning, performance, and representational processes. In H. L. Roitblat, T. G. Bever, & H. S. Terrace (Eds.), Animal cognition (pp. 311-332). Hillsdale, NJ: Erlbaum.
4. Hearst, E. (1987). Extinction reveals stimulus control: Latent learning of feature-negative discriminations in pigeons. Journal of Experimental Psychology: Animal Behavior Processes, 13, 52–64.
5. Hearst, E., & Jenkins, H. M. (1974). Sign-tracking: The stimulusreinforcer relation and directed action. Austin, TX: The Psychonomic Society.