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Describing and explaining age, period, and cohort trends in Americans’ vocabulary knowledge

Author

Listed:
  • Liying Luo

    (The Pennsylvania State University
    The Pennsylvania State University)

  • John Robert Warren

    (University of Minnesota)

Abstract

For a quarter of a century researchers have been documenting and trying to explain trends in Americans’ vocabulary knowledge using data from the General Social Survey (GSS) and its WORDSUM test. Trends in Americans’ vocabulary knowledge have important practical implications—for example, for educational policy and practice—and speak to the American workforce’s competitiveness in the global knowledge economy. We contribute to this debate by analyzing 1978–2018 GSS data using an improved analytical approach that is consistent with theoretical notions of cohort effects and that permits simultaneously estimating inter-cohort average differences and intra-cohort life-course changes. We find that WORDSUM scores peak around age 35 and gradually decline in older ages; the scores were significantly lower in the 1980s and higher in the late 2000s and 2010s; and the 1940–1954 birth cohorts and the 1965 and later birth cohorts had notably higher and lower scores, respectively, than the expectation based on age and period main effects. We provide new evidence that such cohort differences tend to persist over the life course. Interestingly, the effects of increasing educational attainment and decreasing reading behaviors seemed to cancel out, leading to a relatively flat overall period trend. Trends in television viewing and word obsolescence did not appear to affect age, period, or cohort trends in WORDSUM scores.

Suggested Citation

  • Liying Luo & John Robert Warren, 2023. "Describing and explaining age, period, and cohort trends in Americans’ vocabulary knowledge," Population Research and Policy Review, Springer;Southern Demographic Association (SDA), vol. 42(3), pages 1-34, June.
    • Handle: RePEc:kap:poprpr:v:42:y:2023:i:3:d:10.1007_s11113-023-09771-5
    DOI: 10.1007/s11113-023-09771-5
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    References listed on IDEAS

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    1. Liying Luo, 2013. "Assessing Validity and Application Scope of the Intrinsic Estimator Approach to the Age-Period-Cohort Problem," Demography, Springer;Population Association of America (PAA), vol. 50(6), pages 1945-1967, December.
    2. Manfred Grotenhuis & Ben Pelzer & Liying Luo & Alexander W. Schmidt-Catran, 2016. "The Intrinsic Estimator, Alternative Estimates, and Predictions of Mortality Trends: A Comment on Masters, Hummer, Powers, Beck, Lin, and Finch," Demography, Springer;Population Association of America (PAA), vol. 53(4), pages 1245-1252, August.
    3. Stephen Fienberg, 2013. "Cohort Analysis’ Unholy Quest: A Discussion," Demography, Springer;Population Association of America (PAA), vol. 50(6), pages 1981-1984, December.
    4. Ryan P. Bowles & Kevin J. Grimm & John J. McArdle, 2005. "A Structural Factor Analysis of Vocabulary Knowledge and Relations to Age," The Journals of Gerontology: Series B, The Gerontological Society of America, vol. 60(5), pages 234-241.
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