Biological differences between the races
The Genetic/Biological Basis of Race Differences
General Race Differences
Race, Evolution, and Behavior
The Biological Reality of Race
Race, genetics, and human reproductive strategies
Review of Race: The Reality of Human Differences.
Race and Physical Differences
Tracing the Genetic History of Modern Man
The Reality of Racial Differences
Race differences in intelligence
Race Differences in Intelligence (key excerpts from Lynn's book)
Race Differences in Cognitive Ability (Rushton/Jensen)
The Minnesota Study of Twins Reared Apart (Bouchard, et al)
Minnesota Adoption Study Results (Lynn)
Closing the Black/White IQ Gap?
The Scientific Study of General Intelligence (Excerpts and review)
Geographical Centrality as an Explanation for Racial Differences in Intelligence
Mainstream Science on Intelligence
The Limited Malleability of Human Intelligence
The g Factor: The Science of Mental Ability (synopsis)
The g Factor; chapter 12: Population Differences In Intelligence: Causal Hypotheses
Heritability of Intelligence (Murray)
Brain Size Matters
Brain size, IQ, and racial-group differences, evidence from musculoskeletal traits
The association between brain volume and intelligence is of genetic origin
Genetics, Brain Structure, and IQ
The Role of Inheritance in Behavior
Heritability of Cognitive Abilities (Beaujean)
Philosophy of Science that Ignores Science Race, IQ and Heritability
The Affirmative Action Hoax (review)
Race and crime
Cross-National Variation in Violent Crime Rates
Behavioral Genetics and Crime: Introduction
Crime Times: linking brain dysfunction to disordered- criminal- psychopathic behavior; genetic studies
Genes for susceptibility to violence lurk in the brain (National Academy of Sciences)
The Sociobiology of Sociopathy: An Integrated Evolutionary Model
Biology and Crime (book review)
Biosocial studies of antisocial and violent behavior in children and adults (review)
Neural Mechanisms of Genetic Risk for Impulsivity and Violence in Humans (abstract)
Aggressiveness, Criminality and Sex Drive by Race
Testosterone levels (source a, source b, source c)
Genetic Influence on Human Psychological Traits (Bouchard)
The Heritability of Attitudes: A Study of Twins (Vernon, et al)
Heritability of Anxiety Sensitivity- A Twin Study (Stein, et al)
Heritability of Conservatism: A Reared-Apart Twins Study (Bouchard et al)
Genome-wide linkage analysis of a composite index of neuroticism
Heritability of Brain Morphology Related to Schizophrenia
Recent advances in the genetics of schizophrenia
Nature, nurture and mental disorder
The genetics of attention deficit hyperactivity disorder
The Genetics of Addictions Uncovering the Genes
Molecular genetics of bipolar disorder
Summary of Genetic Evidence
Data from The g Factor: The Science of Mental Ability (1998), by Arthur Jensen:
> Identical twins reared in the same family are much more similar in IQ (corr .86) than fraternal twins reared in the same family (corr .60).
> Identical twins reared in separate families are substantially more similar in IQ (corr .75) even than fraternal twins reared in the same family (corr .60).
> Biological siblings reared in separate families have a .24 IQ correlation in childhood, which increases to .47 by the time they reach adulthood, very near the .49 IQ correlation of siblings reared together.
> Unrelated children adopted into the same family have a .25 IQ corellation in childhood, WHICH DIMINISHES TO .01 BY THE TIME THEY REACH ADULTHOOD.
> By adulthood, Blacks adopted into middle-class White families had IQs averaging 89.4, just slightly above the average of 88 for Blacks of the North Central U.S. region from which they originated. This was 9 IQ points below the average of the adopted Black/White hybrids (98.5) in the same families, 16 points below the adopted Whites (105.6), and 20 points below the White biological offspring (109.4).
These results from many large and carefuly scrutinized studies demonstrate with certainty that intelligence and academic attainment, particularly the racial differences thereof, depend much more strongly on genetic inheritance than on family/environmental influences.
> IQ correlates about .7 to .8 with the rate which the brain metabolizes glucose, ascertained by studies employing positron emission tomography to record brain processes. More intelligent people's brain's utilize glucose more efficiently and therefore slower. At the extreme, people who are mentally retarded or have Down's Syndrome consume glucose 30% faster than normal.
> IQ correlates .6 to .7 with a person's speed at various types of reaction-time tests.
> IQ correlates .5 to .54 with object recognition tests, in which an object is flashed very briefly on a screen and must be recognized.
> IQ correlates .4 to .44 with brain size, employing the latest CT (computerized axial tomography) and MRI (magnetic resonance imaging) techniques. Whites' brains average about 88 to 100 cc (or 7-8%) larger than Blacks'.
> The IQ subtests which depend the least upon culture (i.e. on experience and knowledge) are the ones which evince the highest degree of heritability and the ones for which the racial differences are greatest; e.g. raven's progressive matrices (g-corr .8) and backwards recitation of numbers (g-corr .6).
> The robust hereditarian principle of regression to the mean in the offspring of anomalous parents is plainly evident in the offspring of Whites and Blacks: The offspring of IQ-120 Whites regress to an average of 110, midway toward their racial average of 100; while the offspring of IQ-120 Blacks regress to an average of 100, midway toward their racial average (in the U.S.) of 85. The offspring of IQ-70 Whites "regress" to an average of 85; while the offspring of IQ-70 Blacks "regress" to an average of 78.
> Children of high income Blacks have lower IQs than children of low income Whites. The SAT scores of Black children who come from households with incomes of $70,000 or more are lower than that of White children from households with incomes of $20,000 or less, in spite of all the racial preferences enjoyed by the Blacks.
I find it interesting we cannot discuss this sort of topic, because it's probably the only way to resolve our problems along these lines.
The reason is that one side, having imported a ton of people to ensure there's no dominant culture to insist they stop being self-focused, now cannot bear the thought that any research shows that diversity is anything but 100% good and we as people are not anything but 100% equal (except for "chance" of nature) among classes, races, ethnicities, genders, and probably some other stuff I've forgotten.
Reminds me of my Slashdot post this morning:
Advocates call the law a necessary control on hate speech in an age where the Internet makes the spread of messages easier and faster. Opponents say it's censorship and has no place in a free society.
Not only are we divided on whether it should be legal, we are divided on what it should be.
Is it hate speech to call other races subhumans, but legal to note in a scientific paper that there IQ differences [news-medical.net] between [wikipedia.org] races [halfsigma.com], moral evolutionary differences [edge.org], or even that statistically, crime is not distributed evenly [colorofcrime.com] between all groups?
The bigger issue here is what we're obscuring the pursuit of truth with all sorts of social pretense. Let's look at the facts and keep emotion (true hate speech) and censorship out of the debate.
It will also be ignored, of course ;)