Fig 7.

Total number of responses by subject to the comparisons on the symmetry probe trials in Experiment 3 summed over the first four test sessions. Positive  =  test relations that were symmetrical versions of the reinforced symbolic matching baseline relations. Negative  =  test relations that were symmetrical versions of the nonreinforced symbolic matching baseline relations. Stars indicate statistically significant differences. Triangle indicates a statistical significant difference for the first two test sessions.