Page:Memory (1913).djvu/76

a duration of 0.41 seconds for each syllable (p. 31).

Thus $\scriptstyle {\rm {Q}}={\tfrac {100\ \Delta }{\rm {L-85}}}$

Finally A, B, C mean the previously mentioned times of day, 10-11 a.m., 11-12 a.m., 6-8 p.m.

I. 19 minutes.12 tests.Learning and relearning at the time A.

L	WL	Δ	Q
1156	467	689	64.3
1089	528	561	55.9
1022	492	530	56.6
1146	483	663	62.5
1115	490	625	60.7
1066	447	619	63.1
985	453	532	59.1
1066	517	549	56.0
1364	540	824	64.4
975	577	398	44.7
1039	528	511	53.6
952	452	500	57.7
m=1081	498	583	58.2 P.E.m=1

II. 63 minutes.16 tests.The learning at the time A, the relearning at the time B. For ascertaining the influence of this difference in the time of day I have the following data. Six series of 13 syllables each were learned at the time B (not including the time of recitation) in 807 seconds (P.E._m=10) as an average of 39 tests. Just as many series of the same kind were learned at the time A in 763 seconds (P.E._m=7) as an average of 92 tests. Thus the values found in the later period are about 5 per cent. of their own amount too large as compared with those obtained in the earlier period. Therefore the times found for relearning at the time B must be decreased by about 5 per cent. to make them comparable with those of learning.

L	WL	WLk	Δ	Q
1095	625	594	501	49.6
1195	821	780	415	37.4
1133	669	636	497	47.4
1153	687	653	500	46.8
1134	626	595	539	51.4
1075	620	589	486	49.1
1138	704	669	469	44.5
1078	565	537	541	54.5
1205	770	731	474	42.3
1104	723	687	417	40.9
886	644	612	274	34.2
958	591	562	396	45.4
1046	739	702	344	35.8
1122	790	750	372	35.9
1100	609	579	521	51.3
1269	709	674	595	50.0
m1106	681	647	459	44.2 P.E.m=1