Page:Memory (1913).djvu/79

From Wikisource
Jump to navigation Jump to search
This page has been proofread, but needs to be validated.
Retention and Obliviscence as a Function of the Time
71

The average differences between times of learning and relearning at the different times of day vary somewhat with regard to their absolute values. (Of course in the case of B the number 254 must first be multiplied by 4/3, because it is derived from only 6 series.) But the relations of these differences to the times of first learning (the Q's) harmonize sufficiently well. If, therefore, all the Q's are combined in a general average, Q=33.7 (P.E.m=1.2).

V. Two days.26 tests; 11 of these at the time A, 7 at B, 8 at C.
A
L WL Δ Q
1066 895 171 17.4
1314 912 402 32.7
963 855 108 12.3
964 710 254 28.9
1242 888 354 30.6
1243 710 533 46.0
1144 895 249 23.5
1143 874 269 25.4
1149 953 196 18.4
1090 855 235 23.4
1376 847 529 41.0
m1154 854 300 27.2
P.E.m=2.3


B
L WL Δ Q
752 549 203 29.5
1087 740 347 33.9
1073 620 453 44.9
826 693 133 17.5
905 548 357 42.4
811 763 48 6.4
782 618 164 22.8
m891 647 244 28.2
P.E.m=3.5