Figure 2

Behavioral and endocrine data. (A) Intake of Ensure and water by the water cues and Ensure cues groups in their respective contexts. Ensure intake was significantly greater than water intake and was not different between the groups (**p < 0.01). Ensure intake increased and reached a plateau over the 15 day training period (††p < 0.01). (B) Locomotor activity in response to access to water or Ensure in context A during daily training sessions. The levels of total horizontal activity between the groups did not differ significantly, and decreased during the training period, demonstrating that both groups habituated to context A despite different treatments in this environment. (C) While there was no difference in the patterned relationship of total horizontal activity with time between the groups, total horizontal activity was significantly higher on the test day in the Ensure cues group than in the water cues group during intervals 3, 4, and 5 (*p < 0.05). (D) Levels of plasma corticosterone in Ensure cues group were higher than in the water cues group (*p < 0.05).