Gomez, S., Barnes-Holmes, D., & Luciano, M. C. (2001). Generalized break equivalence I. The Psychological Record, 51, 131-150.
The researchers examined generalized break equivalence responding in 5 Ss (aged 18-20 yrs). Training and testing trials were presented in a match-to-sample format. In each matching-to-sample trial the sample and comparison stimuli always differed in at least 2 letters. On all trials, the sample appeared centered on the top half of the monitor screen simultaneously with the 2 comparison stimuli. Results indicate that 3 Ss showed a clear generalization break equivalence pattern (GBEP), 1 S produced a very close result to the GBEP with errors on the transitive relation, and 1 S failed to show the predicted pattern.