Fifteen days of one-hour daily practice produced fairly steady four-place by four-place mental multiplication¶

Claim · All claims
Evidence · 1 study · causal r1 · q1
Currency · newest study 1914 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q1 i? After one hour a day for fifteen days of practice, the experimenter was doing fairly steady work with four-place by four-place numbers. → W. S. Painter 1914

Evidence¶

W. S. Painter 1914¶

W. S. Painter. (1914). Efficiency in Mental Multiplication Under Extreme Fatigue. The Journal of Educational Psychology. https://psycnet.apa.org/journals/edu/

q1 · i? · causal · r1

Practice-period record (Table I) covering stages from two-place by two-place up to four-place by four-place, about three days per stage. The text reports that "at the 15th day the experimenter was doing fairly steady work with four-place by four-place numbers."

"the experimenter worked at the task for one hour a day for fifteen days, almost invariably in the evening between nine and twelve o'clock."

Discussion¶

Related Claims¶

• Under extreme fatigue, mental multiplication efficiency ends at a definite, relatively abruptly appearing point rather than tailing off by degrees — related
• When four-place by four-place mental multiplication came to a standstill under extreme fatigue, ability to multiply any numbers was also lost — related
• Across repeated digit tests pupils improved with practice, with large uniform increases attributed to unconscious memory of the previous day's digits, and no fatigue effect on recall was found — related