A letter-cancellation practice group outperformed a control group in the first parts-of-speech test period¶

Claim · All claims
Evidence · 1 study · causal r1 · q2
Currency · newest study 1909 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Even before the practice period, the group later given letter-cancellation practice was superior to the control group in both quantity and quality of parts-of-speech work. → Linus W. Kline 1909

Evidence¶

Linus W. Kline 1909¶

Linus W. Kline, Ph.D. (1909). Some Experimental Evidence in Regard to Formal Discipline. The Journal of Educational Psychology. https://www.google.com/search?q=%22Some+experimental+evidence+in+regard+to+formal+discipline%22+Kline

q2 · i? · causal · r1

Comparison of two groups of nine adults each in a controlled class experiment at Duluth State Normal School; Table 1 averages show the practice group ahead in the first period. The article reports "the practice group was superior in both quantity and quality of work".

"Inspection of these averages will show (1) that even in the first period the practice group was superior in both quantity and quality of work"

Discussion¶

Related Claims¶

• Letter-cancellation practice produced only small gains and some losses in parts-of-speech cancellation, while the unpracticed control group gained on all parts of speech — related
• Practice produced large within-task speed gains: averaging 89 per cent for letter cancellation and over 200 per cent for digit-for-letter substitution — related
• Improvement by practice continues in both morning and afternoon groups, but the morning group improves faster across weeks — related