Fig. 2. A continuous reinforcement (CR) schedule results in learning and long-term
memory that persists for 2 but not 3 days. (A) A group of 20 naïve snails
received two 45 min CR training sessions with a 1 h interval between the
sessions. Learning occurred (ANOVA, F19,1=51.99,
P<0.001; session 2 was significantly less than session 1,
P<0.01), and a long-term memory had been formed when tested 2 days
later [the memory test session was not significantly different from session 2
(P>0.05) but was significantly different (P<0.01) from
session 1]. (B) As in A, except that long-term memory was tested 3 days later
and N=19. Learning occurred (ANOVA, F18,1=47.32,
P<0.001; session 2 significantly less than session 1,
P<0.01), but no long-term memory was formed [the memory test
session was significantly different from session 2 (P<0.01) and
was not significantly different (P>0.05) from session 1]. Values
are means + S.E.M.
