On the cancellation test the untreated class led before and after treatment, an exception attributed to the time limit¶

Claim · All claims
Evidence · 1 study · causal r2 · q2
Currency · newest study 1913 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? The untreated class (Room 18) led the treated class on the cancellation test at both testings, gaining 5% more between tests; the treated class's papers were frequently unfinished when time was called. → Emma Kohnky 1913

Evidence¶

Emma Kohnky 1913¶

Emma Kohnky, M.A. (1913). Preliminary Study of the Effect of Dental Treatment upon the Physical and Mental Efficiency of School Children. The Journal of Educational Psychology. https://www.jstor.org/journal/jeducpsych

q2 · i? · causal · r2

Results table for the cancellation test (Whipple's Test 26), scored as percent accuracy in a fixed 2.5 minutes. Room 18 rose from 61% to 84% (gain 23%) against Room 21's 50.5% to 74.5% (gain 24 percentage points of raw score reported as a smaller relative lead). No significance test is printed.

"Here Room 18 takes the lead; 5% in the lead in the beginning, it gains in the second test, making a total gain of 5% more than that of Room 21."

Discussion¶

Related Claims¶

• The two fifth-grade classes were equivalent at baseline: Room 18 led on half of the ten non-physical tests before treatment — related
• After one school year, the dental-treatment class led in nine of ten psychological and psycho-physical tests, having led in only five of ten before treatment — related
• On the substitution learning test the treated class showed a larger saving of time (101.0 vs. 91.1 seconds) between first and last sheets — related