The data cannot be used to investigate end spurt because subjects were not told when each test would end¶

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? Because subjects were not told that the fifth two-minute period was the close of each test, the results cannot be used to investigate end spurt. → Chapman 1914

Evidence¶

Chapman 1914¶

Chapman, J. C. (1914). A Study of Initial Spurt in the Case of Addition. The Journal of Educational Psychology. https://doi.org/10.1037/h0070019

q1 · i? · causal · r1

Author's stated limitation on the scope of the same 46-subject addition experiment. Since subjects were uninformed about when each test ended, the article explicitly excludes these data from "the problem of \"end spurt\"", limiting the findings to initial spurt.

"The subjects were not told, though doubtless in many cases they knew, that the fifth two-minute period was the close of each test: such being the case, these results cannot be used to investigate the problem of "end spurt.""

Discussion¶

Related Claims¶

• Addition efficiency drops sharply from the first to the second two-minute period, indicating initial spurt — related
• Prior initial-spurt experiments failed because test periods were too lengthy and subjects too few — related
• Initial spurt takes place as a general rule in addition, which the author argues chance variation cannot explain — related
• Efficiency in the work curve is conditioned by factors beyond fatigue proper: practice, adaptation, preparedness, warming up, spurts, voluntary effort, ennui, and diurnal rhythms (Offner) — related