UV dosage shows a nonmonotonic pattern: one or three UV essays outperform two for grades and continuation¶

Claim · All claims
Evidence · 1 study · causal r3 · q3 · i0 negligible
Currency · newest study 2018 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i0 A significant three-way interaction among the three UV essay conditions emerged for course grade (β = .09, p = .006) and continuation (Wald = 16.96, B = .48, p < .001), with posthoc comparisons showing single doses and full dosage effective but two doses not. → Canning 2018

Evidence¶

Canning 2018¶

Canning, E. A., Harackiewicz, J. M., Priniski, S. J., Hecht, C. A., Tibbetts, Y., & Hyde, J. S. (2018). Improving Performance and Retention in Introductory Biology with a Utility-Value Intervention. Journal of educational psychology. https://doi.org/10.1037/edu0000244

q3 · i0 · causal · r3

Posthoc LSD comparisons probing the significant three-way interaction in the fully crossed 2×2×2 design on course grade and continuation. The article reports "both three doses as well as a single dose of UV (at any time point) promoted performance" while two doses did not; the three-way interaction on grades was β = .09, p = .006 — a small effect. 88.16% of three-dose students, 85.92% of early single-dose, and 84.51% of late single-dose students continued versus 69.51% of controls.

"In general, both three doses as well as a single dose of UV (at any time point) promoted performance, compared to the control condition (see Figure 2). Although, the condition in which students received the full dosage of UV had the highest overall mean, it was not more effective than any of the three conditions in which students received a single dose of UV."

Discussion¶

Related Claims¶

• A UV essay in the final unit of the course promotes enrollment in the second biology course, especially for high-performing students — related
• A utility-value writing intervention increases course grades in introductory biology relative to a summarizing control — related
• The overall intervention contrast comparing all UV conditions to control was not significant, and no individual UV condition significantly outperformed control in the dummy-coded model — related
• A utility-value writing intervention increases continuation to the second course of the biology sequence — related
• Timing of a single UV essay is moderated by prior performance: early UV essays help low performers, late UV essays help high performers — related