Figure 2.

Mean Sucrose Generalization Scores for SA and SP rats in response to RO water and a number of electrolyte-containing stimuli. Filled circles denote the Sucrose Generalization Score for each individual rat. A score of 0.0 indicates that responding to the test stimulus was identical to responding for 1.0 mm quinine; a score of 1.0 indicates that responding to the test stimulus was identical to responding for 600 mm sucrose. No differences between SP and SA rats were detected in response to any stimulus; as such, the data were collapsed across groups for further analyses (indicated by brackets). As the amount of dissolved electrolytes was increased, the mean Sucrose Generalization Scores displayed a tendency to approach a score of 0.5. One-sample t tests revealed that RO H₂O was not treated as significantly different from 1.0 mm quinine (bracket a), while Dasani bottled water, artificial (Art.) saliva, and 100 mm NaCl) were treated as significantly different from 1.0 mm quinine (ps ≤ 0.05; bracket b).