Browsing by Author "May, Henry"
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Item Purchases, Consumption, and BMI of SNAP Farmers’ Market Shoppers(Journal of Hunger and Environmental Nutrition, 2021-10-31) Karpyn, Allison; Pon, Julia; Grajeda, Sara Bernice; Wang, Rui; Merritt, Kathryn E.; Tracy, Tara; May, Henry; Sawyer-Morris, Ginnie; Humphrey, Layne; Hunt, AlanPurchasing, consumption, and health data from 3,073 Supplemental Nutrition Assistance Program Shoppers (SNAP) at 77 U.S. farmers’ markets (FMs) are reported. Descriptive and bivariate analyses indicate SNAP households spent $345/month on all groceries and $153.76/month on all fruit and vegetable (FV) purchases; daily FV consumption significantly correlated with percentage of household expenditures on FV and household FV dollars/month. Females and Hispanics spent significantly more on FV. 82% of participants were food insecure and 26.1% reported fair/poor health. Average BMI was 28.5. Findings suggest SNAP FM shoppers have unique FV expenditure and consumption patterns, despite higher food insecurity, meriting future research.Item The Effects of Bookworms Literacy Curriculum on Student Achievement in Grades 2-5(Scientific Studies of Reading, 2023-12-03) May, Henry; Strong, John Z.; Walpole, SharonPurpose In this study, we investigated the effects of a schoolwide program, Bookworms K-5 Reading and Writing, on student achievement. Method The study included seven cohorts of students (N = 8,806) in grades 2–5 in 17 elementary schools across three school years. We used a comparative interrupted time-series design, conducting multilevel growth curve models of Measures of Academic Progress reading scores with up to 10 data points per student. By modeling each student’s growth curve, including a time by treatment interaction term, we were able to estimate the change in students’ achievement trajectories corresponding to the implementation of Bookworms. Results Results confirm a significant positive impact of Bookworms on achievement, with gains compounding over time and producing an overall standardized effect size of .26 by the end of 5th grade. Students who began third grade with relatively weaker achievement experienced more growth than those with average achievement, and those with average achievement experienced more growth than those with the highest achievement. Conclusion This study provides evidence that a comprehensive literacy curriculum that emphasizes high-volume reading of grade-level texts and the use of evidence-based instructional practices produces positive effects on student achievement for students with a range of initial reading achievement.Item Understanding Impacts of SNAP Fruit and Vegetable Incentive Program at Farmers’ Markets: Findings from a 13 State RCT(International Journal of Environmental Research and Public Health, 2022-06-17) Karpyn, Allison; Pon, Julia; Grajeda, Sara B.; Wang, Rui; Merritt, Kathryn E.; Tracy, Tara; May, Henry; Sawyer-Morris, Ginnie; Halverson, McKenna M.; Hunt, AlanDisparities in healthy food access and consumption are a major public health concern. This study reports the findings from a two-year randomized control trial conducted at 77 farmers’ markets (FMs) in 13 states and the District of Columbia that sought to understand the impact of fruit and vegetable (FV) incentive vouchers, randomly issued at varied incentive levels to Supplemental Nutrition Assistance Program (SNAP) recipients, for use at FMs. Measures included FV and overall household food purchasing; FV consumption; food insecurity; health status; market expenditure; and demographics. A repeated-measures mixed-effects analysis and the Complier Average Causal Effect (CACE) were used to examine outcomes. Despite 82% reporting food insecurity in the prior year, the findings showed that financial incentives at FMs had statistically significant, positive effects on FV consumption; market expenditures increased with added incentives. SNAP recipients receiving an incentive of USD 0.40 for every USD 1.00 in SNAP spent an average of USD 19.03 per transaction, while those receiving USD 2 for every USD 1 (2:1) spent an average of USD 36.28 per transaction. The data showed that the incentive program at the highest level (2:1) maximally increased SNAP FM expenditure and FV consumption, increasing the latter by 0.31 daily cups among those who used their incentive (CACE model).