The more the substitution practice was distributed over days, the larger the practice gains and the more pronounced the negative transfer effects¶

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? Passing from 1 day to 20 days of practice distribution, average improvement rose from 193.6 to 273.5 per cent, and negative transfer values tended to grow larger. → 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

Table 2 groups subjects by days of practice (1 to 20); improvement in the practice task rose with distribution, and the article notes negative transfer values were larger the more practice was spread out, confirming the distribution principle of Ebbinghaus and Jost.

"In passing from 1 day to 20 days, the percentage of increase of efficiency rises from 193.6 to 273.5, and, with a few exceptions, to be expected from the small number of cases in some groups"

Discussion¶

Related Claims¶

• Practice in substituting digits for letters transferred positively to writing symbols for digits but interfered with writing digits for symbols — related
• The optimal interstudy interval increases as the retention interval increases — 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