A social science passage presents a research brief and a source note about family dinner frequency and vocabulary scores. The brief says analysts compared family-dinner frequency with children's vocabulary assessment scores among children in a household language study and found that children in families reporting more dinners together scored higher on vocabulary assessments. The source note adds that families with more shared dinners also differed in work schedules, book access, and conversation routines. The author uses the example to show why precise language matters when interpreting findings.