IQ
Source: *Intelligence (Elsevier)*
Date of Publication: *2019*
Author(s): *Heiner Rindermann, David Becker, Thomas R. Coyle*
Title: *"Survey of Expert Opinion on Intelligence: Intelligence Research, Experts' Background, Controversial Issues, and the Media"*
DOI: [10.1016/j.intell.2019.101406](https://doi.org/10.1016/j.intell.2019.101406)
Subject Matter: *Psychology, Intelligence Research, Expert Analysis*
- General Observations:
- Survey of 102 experts on intelligence research and public discourse.
- Evaluated experts' backgrounds, political affiliations, and views on controversial topics in intelligence research.
2. Subgroup Analysis:
- 90% of experts were from Western countries, and 83% were male.
- Political spectrum ranged from 54% left-liberal, 24% conservative, with significant ideological influences on views.
3. Other Significant Data Points:
- Experts rated media coverage of intelligence research as poor (avg. 3.1 on a 9-point scale).
- 50% of experts attributed US Black-White IQ differences to genetic factors, 50% to environmental factors.
- Primary Observations:
- Experts overwhelmingly support the g-factor theory of intelligence.
- Heritability of intelligence was widely accepted, though views differed on race and group differences.
2. Subgroup Trends:
- Left-leaning experts were more likely to reject genetic explanations for group IQ differences.
- Right-leaning experts tended to favor a stronger role for genetic factors in intelligence disparities.
3. Specific Case Analysis:
- The study compared media coverage of intelligence research with expert opinions.
- Found a disconnect between journalists and intelligence researchers, especially regarding politically sensitive issues.
- Strengths of the Study:
- Largest expert survey on intelligence research to date.
- Provides insight into how political orientation influences scientific perspectives.
2. Limitations of the Study:
- Sample primarily from Western countries, limiting global perspectives.
- Self-selection bias may skew responses toward those more willing to engage with controversial topics.
3. Suggestions for Improvement:
- Future studies should include a broader range of global experts.
- Additional research needed on media biases and misrepresentation of intelligence research.
- Provides insight into expert consensus and division on intelligence research.
- Highlights the role of media bias in shaping public perception of intelligence science.
- Useful for understanding the intersection of science, politics, and public discourse on intelligence research.
- Examine cross-national differences in expert opinions on intelligence.
2. Investigate how media bias impacts public understanding of intelligence research.
3. Conduct follow-up studies with a more diverse expert pool to test findings.
Source: *Intelligence (Elsevier)*
Date of Publication: *2015*
Author(s): *Davide Piffer*
Title: *"A Review of Intelligence GWAS Hits: Their Relationship to Country IQ and the Issue of Spatial Autocorrelation"*
DOI: [10.1016/j.intell.2015.08.008](https://doi.org/10.1016/j.intell.2015.08.008)
Subject Matter: *Genetics, Intelligence, GWAS, Population Differences*
- General Observations:
- Study analyzed genome-wide association studies (GWAS) hits linked to intelligence.
- Found a strong correlation (r = .91) between polygenic intelligence scores and national IQ levels.
2. Subgroup Analysis:
- Factor analysis of 9 intelligence-associated alleles revealed a metagene correlated with country IQ (r = .86).
- Allele frequencies varied significantly by continent, aligning with observed population differences in cognitive ability.
3. Other Significant Data Points:
- GWAS intelligence SNPs predicted IQ levels more strongly than random genetic markers.
- Genetic differentiation (Fst values) showed that selection pressure, rather than drift, influenced intelligence-related allele distributions.
- Primary Observations:
- Intelligence-associated SNP frequencies correlate highly with national IQ levels.
- Genetic selection for intelligence appears stronger than selection for height-related genes.
2. Subgroup Trends:
- East Asian populations exhibited the highest frequencies of intelligence-associated alleles.
- African populations showed lower frequencies compared to European and East Asian populations.
3. Specific Case Analysis:
- Polygenic scores using intelligence-related alleles significantly outperformed random SNPs in predicting IQ.
- Selection pressures may explain differences in global intelligence distribution beyond genetic drift effects.
- Strengths of the Study:
- Comprehensive genetic analysis of intelligence-linked SNPs.
- Uses multiple statistical methods (factor analysis, Fst analysis) to confirm results.
2. Limitations of the Study:
- Correlation does not imply causation; factors beyond genetics influence intelligence.
- Limited number of GWAS-identified intelligence allelesβfuture studies may identify more.
3. Suggestions for Improvement:
- Larger cross-population GWAS studies needed to validate findings.
- Investigate non-genetic contributors to IQ variance in addition to genetic factors.
- Supports research on genetic influences on intelligence at a population level.
- Aligns with broader discussions on cognitive genetics and natural selection effects.
- Provides a quantitative framework for analyzing polygenic selection in intelligence studies.
- Conduct expanded GWAS studies including diverse populations.
2. Investigate gene-environment interactions influencing intelligence.
3. Explore historical selection pressures shaping intelligence-related alleles.
Source: *Genetic Epidemiology*
Date of Publication: *2001*
Author(s): *Neil Risch, Esteban Burchard, Elisa Ziv, Hua Tang*
Title: *"Genetic Structure, Self-Identified Race/Ethnicity, and Confounding in Case-Control Association Studies"*
DOI: [10.1038/ng1199-355](https://doi.org/10.1038/ng1199-355)
Subject Matter: *Population Genetics, Biomedical Research, Race & Ancestry*
- General Observations:
- Sample: 3,636 individuals from White, African-American, East Asian, and Hispanic groups.
- Genotyped for 326 microsatellite markers.
2. Subgroup Analysis:
- Self-identified race matched genetic clusters 99.86% of the time.
- Each group formed distinct, non-overlapping clusters in genetic space.
3. Other Significant Data Points:
- Genetic structure correlated strongly with continental ancestry, not geography of residence.
- Demonstrated minimal overlap between populations, affirming biological distinctiveness of racial groupings.
- Primary Observations:
- Self-identified race is a valid proxy for genetic ancestry in medical and population studies.
- Racial classification is not merely βsocially constructed,β but reflects deep ancestral population structure.
2. Subgroup Trends:
- East Asians, Africans, and Europeans formed clear, separable genetic clusters.
- Hispanics showed admixture, but still clustered distinguishably.
3. Specific Case Analysis:
- The paper challenged the PC dogma that race is biologically meaningless.
- Warned that ignoring race in genetic studies can introduce confounding, especially in disease association research.
- Strengths of the Study:
- Robust dataset across multiple racial/ethnic groups.
- Clear empirical demonstration of the biological reality of race.
2. Limitations of the Study:
- Did not account for intra-population stratification or recent admixture in fine detail.
- Based on microsatellite markers β less resolution than full-genome sequencing.
3. Suggestions for Improvement:
- Update with modern SNP or WGS data.
- Include more populations (e.g., Middle Easterners, South Asians) for global structure.
- Provides foundational genetic evidence supporting the coherence of racial classifications.
- Useful in refuting the claim that race is merely a sociological artifact.
- Directly applicable to the race realism and genetic confounding discussion in medical ethics and social sciences.
- Analyze how racial identity correlates with disease risk and treatment outcomes.
2. Compare modern SNP datasets to validate or refine the 2001 conclusions.
3. Investigate how DEI-driven research suppresses or distorts findings on genetic ancestry.