The WWC found Voyager Universal Literacy System® had potentially positive effects on alphabetics for kindergarten students¶

Claim · All claims
Evidence · 1 study · quant-synthesis r1 · q2 · i1 small
Currency · newest study 2007 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i1 Across two quasi-experimental studies, the alphabetics domain average effect size was 0.28, rated potentially positive. → Voyager Universal Literacy System® — WWC Intervention Report 2007

Evidence¶

Voyager Universal Literacy System® — WWC Intervention Report 2007¶

Voyager Universal Literacy System® — WWC Intervention Report. (2007). What Works Clearinghouse, U.S. Department of Education. https://ies.ed.gov/ncee/wwc/InterventionReport/538

q2 · i1 · quant-synthesis · r1

WWC synthesis of two quasi-experimental studies (Frechtling et al., 2006; Hecht, 2003) with over 600 kindergarten students. The WWC-printed domain average effect size was 0.28 (small), with an average improvement index of +11 percentile points, described as "positive and large enough to be considered substantively important" for one study.

"The average improvement index for alphabetics is +11 percentile points across the two studies, with a range of –8 to +27 percentile points across findings."

Discussion¶

Related Claims¶

• The WWC found Voyager Universal Literacy System® had potentially negative effects on comprehension — related
• The Frechtling, Zhang, and Silverstein (2006) study showed a substantively important positive average alphabetics effect, while Hecht (2003) did not — related
• Evidence extent for Voyager is moderate to large for alphabetics and small for comprehension, with no qualifying studies of fluency or general reading achievement — related
• No individual alphabetics outcome reached statistical significance in the WWC analysis — related
• Functional life skills development programs show potentially positive effects on independent living, with a small evidence base — related