Story Friends treatment participants had greater vocabulary gains than comparison participants on unit tests, with large effect sizes¶

Claim · All claims
Evidence · 1 study (2 entries) · causal r1 · q3 · i3 large
Currency · newest study 2015 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q3 i? Treatment participants had greater gains than comparison participants on each of the three unit vocabulary tests. → Kelley 2015 q3 i3 Effect sizes for unit test gains were large (d = 2.33, 1.37, 2.62 for Units 1-3). → Kelley 2015 (2)

Evidence¶

Kelley 2015¶

Kelley, E. S., Goldstein, H., Spencer, T. D., & Sherman, A. (2015). Effects of automated Tier 2 storybook intervention on vocabulary and comprehension of preschool children with limited oral language skills. Early Childhood Research Quarterly, 31, 47-61. https://doi.org/10.1016/j.ecresq.2014.12.004

q3 · i? · causal · r1

Randomized control group design with 18 children (n = 9 per group) from public prekindergarten programs serving families with low income; ANOVA on unit test gain scores used "Bonferroni adjusted alpha levels of 0.016". The treatment group showed "greater gains than comparison participants" on all three units.

"participants in the treatment group had greater gains than comparison participants for each of the three units [F(1, 17) = 24.33, 8.53, 30.86 for Units 1, 2, 3 respectively, p ≤ 0.01]"

Kelley 2015 (2)¶

Kelley, E. S., Goldstein, H., Spencer, T. D., & Sherman, A. (2015). Effects of automated Tier 2 storybook intervention on vocabulary and comprehension of preschool children with limited oral language skills. Early Childhood Research Quarterly, 31, 47-61. https://doi.org/10.1016/j.ecresq.2014.12.004

q3 · i3 · causal · r1

Cohen's d computed from gain scores in the same randomized group design (n = 9 per group) were large for every unit: "Unit 1, d = 2.33; Unit 2, d = 1.37; Unit 3, d = 2.62."

"Effect sizes, Cohen's d, calculated using the gain scores for each unit test were large: Unit 1, d = 2.33; Unit 2, d = 1.37; Unit 3, d = 2.62."

Discussion¶

Related Claims¶

• Embedded vocabulary lessons in prerecorded storybooks produce large vocabulary learning gains relative to hearing the same stories without lessons — possibly the same claim (merge candidate)
• Vocabulary learning under embedded instruction declined over the course of the school year — related
• Preschoolers learn almost no challenging vocabulary from hearing stories without embedded lessons — related