Fig. 5.

Performance during the test of recall forB₁ as a function of temporal distance between learning of B₁ andB₂. B₁ was tested for recall 1 week after B₁ andB₂ were learned. A, Mean ± SE improvement in performance for two groups of subjects.Thin line is for the group (n = 9) that practiced in B₂ at 5 min after completion of practice in B₁. Thick line is for the group (n = 10) that practiced in B₂ at 5.5 hr afterB₁. B, The ability to recallB₁ is significantly dependent on temporal distance between B₁ andB₂. Each bar is the mean ± 95% confidence interval of change in performance as measured for a target set during the recall test versus during initial practice.