A no-instruction control group showed no knowledge change over the six-week period, ruling out testing and external influences¶

Claim · All claims
Evidence · 1 study · causal r2 · q2
Currency · newest study 2012 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i? Control group scores did not differ significantly between pre- and retention test (Wilcoxon-Test, Z = -0.443; p = .568). → Heyne 2012

Evidence¶

Heyne 2012¶

Heyne, T., & Bogner, F. X. (2012). Guided Learning at Workstations about Drug Prevention with Low Achievers in Science Education. World Journal of Education. https://doi.org/10.5430/wje.v2n6p1

q2 · i? · causal · r2

Control group (n = 52) attended only pre- and retention tests within the same six-week time-frame without instruction on illegal drugs; the article reports scores "did not differ significantly at all", indicating no testing effect or external influence. No effect size printed.

"Control group scores did not differ significantly at all (Wilcoxon-Test, Z = -0.443; p = .568)."

Discussion¶

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