. The psychology of learning; an advance text in educational psychology . / Z J f^ ^ . Figure 36. The graphs show the course of efficiency during an hourafter habituation in card-sorting, four different subjects. 262 THE PSYCHOLOGY OF LEARNING time they actually do sleep. Their data are from sev-eral places in western United States, and are shown inthe accompanying table. TABLE 30. SHOWING THE AVERAGE TIME IN HOURS AND MINUTES SPENT INSLEEP BY PEOPLE OF VARIOUS AGES, Age 6-7 7-8 8-9 9-10 10-11 11-12 12-13 Amount of sleep 11:14 10:41 10:42 10:13 9:56 10:00 9:36 Univ. Stu- Ages 13-14 14-
. The psychology of learning; an advance text in educational psychology . / Z J f^ ^ . Figure 36. The graphs show the course of efficiency during an hourafter habituation in card-sorting, four different subjects. 262 THE PSYCHOLOGY OF LEARNING time they actually do sleep. Their data are from sev-eral places in western United States, and are shown inthe accompanying table. TABLE 30. SHOWING THE AVERAGE TIME IN HOURS AND MINUTES SPENT INSLEEP BY PEOPLE OF VARIOUS AGES, Age 6-7 7-8 8-9 9-10 10-11 11-12 12-13 Amount of sleep 11:14 10:41 10:42 10:13 9:56 10:00 9:36 Univ. Stu- Ages 13-14 14-15 15-16 16-17 17-18 18-19 dents. Amount of sleep 9:31 9:06 8:54 8:30 8:46 8:46 7:47 The hours of sleep shown in the table may be takenas fairly representative of the amount of sleep requiredat the different ages. Rather, they should be taken asthe minimum requirements, for it is doubtful that anyof the figures used in computing the averages would betoo high, and it is quite likely that in some cases, theywould be too low. This would make the averages a lit-tle lov/er than the
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