Emil Kirkegaard requested an update to the Admixture in the Americas analyses, a complex task requiring, among other things, the computation of new national cognitive scores for countries and territories in the Americas. Three existing datasets are available for this purpose:
- Antilok et al.’s Harmonized Test Score (HTS) Dataset: Used to create the World Bank’s Harmonized Test Scores (HTS), this dataset covers all but three sovereign countries—Barbados, the Bahamas, and Suriname. Scores were averaged over 5-year intervals from 2000 to 2020, except for Bolivia, where data from 1995–2000 was used.
- Becker’s 2023 National IQ Scores: These measure a construct distinct from achievement scores and rely primarily on convenience samples.
- GMAT-Based Scores: Previously utilized in an earlier paper, these scores have been updated. They cover 2000–2020 data, except for small territories (e.g., Aruba, British Virgin Islands, Guadeloupe, Martinique, Montserrat, and Netherlands Antilles), where 1980s–2020 data was included due to limited 2000–2020 sample sizes and the absence of a clear secular trend.
