Archive

2024

20. October Sometimes Biased, But Not Systematically: Twin Study Assumptions with A Focus on the Equal Environment
03. July National IQ papers must be retracted: Why Kevin Bird and Rebecca Sear don’t get it
01. June Controversy over the predictive validity of IQ on job performance
07. May How IQ became less important than personality: A critical examination of Borghans et al. (2016)
03. April Wealth, Poverty and Politics: A must read for understanding group differences
23. February The Structure of Well Designed Online IQ Tests
05. February Gender wage gap: Why the discrimination theory (likely) fails

2023

19. November Affirmative action failed: An extensive and complicated literature review
01. October Racial/Ethnic Differences in the SAT in 2023
23. September Canadian Race/Ethnic Differences on the LSAT (2019-2023)
06. September SAT/ACT Scores by Detailed Race/Ethnicity From Applicants on Common App (2021)
01. September Spearman’s g Explains Black-White but not Sex Differences in Cognitive Abilities in the Project Talent
06. August A remarkable similarity between IQ and SAT scores across ethnic groups
26. July The SAT and Racial/Ethnic Differences in Cognitive Ability
05. July Math abilities of transracial adoptees in the HSLS: Parent education does not moderate group differences
27. May IQ scores by ethnic group in a nationally-representative sample of 10-year old American children
28. April The Untold Group Interaction in the Black-White IQ Gap
07. April How Autism Drives Human Invention: But Is It Just Autism?
06. March Decoding Admixture Results
28. February How Well Personality Traits Predict Social Outcomes? It’s Complicated…
10. February DIF Review and Analysis of Racial Bias in Wordsum Test using IRT and LCA
02. January Fair and Square: A Conclusion on IQ Test Bias

2022

22. December Schooling enhances IQ, not intelligence
30. November The Inconvenient Truth Behind the Black-White Income and Mobility Gap
14. November Links for Fall ’22
11. September Re-analysis of Willerman’s Study: Race of Mother’s Hypothesis
02. August Links for Summer ’22
18. July Classical Twin Data and the ACDE Model
31. May Links for May ’22
30. April Links for April ’22
31. March Links for March ’22
28. February Links for February ’22
31. January Links for January ’22

2021

21. October The Post-hoc 4th Review
16. March Calling a Deer a Horse
02. March Human Phenome Diversity Foundation 2021 Fundraiser
08. February “Insignificant” Differences

2019

22. December The Persistence of Cognitive Inequality: Reflections on Arthur Jensen’s “Not Unreasonable Hypothesis” after Fifty Years

2017

2016

15. June New MQ paper
23. April Top Ten Human Varieties Posts
19. March Philosophical Reflections on On Genetic Interest
15. March The Genealogy of Differences in the Americas
28. February Equal Environments Assumption and Sex Differences
31. January IQ and Permanent Income: Sizing Up the “IQ Paradox”
20. January The Evolutionary Default Hypothesis and Negative HBD

2015

13. November Measured Proficiency of Ethnic Groups in Canada
05. November The Measured Proficiency of Somali Americans
01. November Heritability of Racial and Ethnic Pride, Preference, and Prejudice
30. October Asian American Subgroup SAT Performance
28. October Using Surnames to Assess Ethnic Aptitude
11. October "Killing Jensen": A preliminary comment on Chanda Chisala’s environmentalist argument
14. September General Cognitive Ability Is Almost Perfectly Stable from Early Adulthood to Late Middle Age
21. July IQ and Personality: What James Heckman Got Wrong
17. July Alice Brues on Race
14. July Socioeconomic Status and Heritability of IQ Redux
12. July Bias in Measures of Implicit Racial Bias
11. July Bifactor Model Investigation of Spearman's Hypothesis
19. June Nature of Race (Published)
18. May Regional Admixture and Aptitude in Colombia
02. January The Bell Curve, 20 years after

2014

2013

21. December Racial Differences on Digit Span Tests
08. December Spearman's Hypothesis and Racial Differences on the DAS-II
17. November On the partial mediating role of processing speed between black-white differences, IQ and GPA
20. October Race-SES Interaction : Some Evidence of Increasing Black-White IQ Differences With SES Levels From Various Survey Data
05. October Flynn contra Rushton on principal component analysis : A failed replication
04. October An Analysis of the NLSY79 and NLSY97 Full Sibling Correlations by Race
21. September Jensen effect on racial IQ differences and GPA controlling for SES in the NLSY79 and NLSY97
20. September A few New Analyses
05. September Investigation of the relationship between mental retardation with heritability and environmentality of the Wechsler subtests
28. August Test-retest effects : No g gains in two independent samples
18. August A Meta-Analysis of Jensen Effect on Heritability and Environmentality of Cognitive Tests Using the Method of Correlated Vectors
05. July Hollow Flynn Effect in Two Developing Countries and A Further Test of the Debatable Black-White Genetic Differences
07. June Re-analysis of Jensen’s study of Capron and Duyme adoption data
30. May Similarity in the g factor structure between- and within-families across racial groups in the NLSY97 and NLSY79
26. May The Onset and Development of B-W Ability Differences: Early Infancy to Age 3 (Part 1)
13. May IQ advantage of multiracials : A Jensen Effect
03. May HVGIQ: Bermuda
27. April Self-reported white ancestry among US blacks : A Jensen effect
24. April A Brief Comment on Hu (2013, April, 18): The Meaning of Differential Regression
22. April Skin Color, Verbal IQ, and Test of the Colorism Hypothesis in the GSS
18. April IQ Regression to the Mean : the Genetic Prediction Vindicated
18. April The Aptitude of Jews and Gentiles at Selective Universities in the US
14. April Some Further Notes on g and Shalizi
11. April HVGIQ: Dominican Republic
07. April Color Differences: Corrections and Further Analysis. Part 2
03. April Is Psychometric g a Myth?
29. March Cryptic Admixture, Mixed-Race Siblings, & Social Outcomes
25. March Pigmentocracy: A Longitudinal Approach
22. March Holes in the Colorism Hypothesis
21. March Color Differences: Corrections and Further Analysis. Part 1
12. March HVGIQ: The Bahamas
06. March Color Differences: Ubiquitous Yet Understudied
01. March HVGIQ: Jamaica
22. February Colorism in America?
16. February Gildea (1992): A lost IQ study of transracially adopted Koreans
09. February Skin Color is Not Driving the Relationship Between Racial Admixture and IQ
07. February HVGIQ: Cayman Islands
02. February More than Just “Colorism”: Part 1.
31. January HVGIQ: Cuba
29. January Spearman’s hypothesis and the NLSY97-ASVAB, part 2
26. January By way of introduction
26. January Spearman's hypothesis and the NLSY97-ASVAB, part 1
26. January Introduction to: The HBD Bibliography‏
24. January HVGIQ: Haiti
22. January The Limits of Selectivity
22. January Introducing myself : Meng Hu
19. January The Human Varieties Global IQ Dataset
18. January What if the BW IQ difference is entirely due to environment ?
18. January The magnitude of the BW gap with parental education in the NLSY97
17. January Greetings
15. January Secular Changes in the Black-White Cognitive Ability Gap
15. January Fuzzy Wuzzy was a bear….
15. January IQs of US Immigrants in the NLSY97 (Whites, Blacks, Hispanics)
15. January 100 years of Testing Negro Intelligence

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