Sources & References
Public reference lists supporting Data Before Opinion episodes.
- U.S. Census Bureau: Median Age at First Marriage
Open sourceUsed for national marriage timing context and historical comparison.
- Pew Research Center: Age Gaps Between Spouses
Open sourceUsed for discussion of average husband-wife age gaps and long-term demographic trends.
- American Community Survey Data
Open sourceUsed for occupational and marital-status analysis context.
- Improving Students’ Learning With Effective Learning Techniques
Open sourceDunlosky and colleagues review common learning techniques and identify high-utility strategies such as practice testing and distributed practice.
- CDC/NCHS: Fertility and Maternal Age Data
Open sourceUsed for fertility, birth timing, and pregnancy-related demographic context.
- U.S. Census Bureau: Estimated Median Age at First Marriage
Open sourceUsed for modern first-marriage age by sex.
- General Social Survey
Open sourceUsed as a nationally known survey source for family, marriage, work, and social attitudes.
- Active Learning Increases Student Performance in Science, Engineering, and Mathematics
Open sourceFreeman and colleagues meta-analysis on active learning in STEM.
- Pew Research Center: Marriage and Family Trends
Open sourceUsed for social and demographic context on marriage and family formation.
- The Marital Satisfaction of Differently Aged Couples
Open sourceUsed for discussion of age gaps and marital satisfaction over time.
- The Critical Importance of Retrieval for Learning
Open sourceKarpicke and Roediger research on retrieval practice and learning.
- Sven Drefahl: How Does the Age Gap Between Partners Affect Their Survival?
Open sourceUsed for discussion of age differences, mortality, and long-term health implications.