. . . the case for g rests on a statistical technique, factor analysis, which works solely on correlations between tests. Factor analysis is handy for summarizing data, but can't tell us where the correlations came from; it always says that there is a general factor whenever there are only positive correlations. The appearance of g is a trivial reflection of that correlation structure. A clear example, known since 1916, shows that factor analysis can give the appearance of a general factor when there are actually many thousands of completely independent and equally strong causes at work. Heritability doesn't distinguish these alternatives either. Exploratory factor analysis being no good at discovering causal structure, it provides no support for the reality of g.
. . .
To paraphrase Hume:
When we run over libraries, persuaded of these principles, what havoc must we make? If we take in our hand any paper; of macroeconomics or correlational psychology, for instance; let us ask, Does it draw its causal inferences from observations with consistent methods? No. Does it draw its causal inferences from experiments, controlled or randomized? No. Commit it then to the recycling bin: for it can contain nothing but sophistry and illusion.
Franklin D. Roosevelt, whose calmness is often recalled in discussing Mr. Obama, may have gotten it from his parents. According to Jonathan Alter’s account in "The Defining Moment," when the family was aboard the ocean liner Germania as it plunged beneath a giant wave, F.D.R.’s father remarked coolly, "We seem to be going down." His mother took her fur and nestled 3-year-old Franklin into it: "Poor little boy, if he must go down, he’s going down warm."
This is Lukas Bergstrom's weblog. You can also find me on Twitter and LinkedIn.
Tech
barcamp, Product Management, Medical, Business, RSS, Mobile, Automobile, Crowdsourcing, Storage, Data, Collaboration, Android, Security, a11y, Open, AI, Wearables, Javascript, Development, s60, Energy, Social, WRX, Web analytics, Shopping, Hardware, Audio, OS, PIM, Net, Web, Visual, MacOS
Other
Travel, NYC, CrowdFlower, Transportation, California, Agriculture, Podcasts, Bicycling, Statistics, Boston, Activism, Games, Video, Clothes, Friday, Food & Drink, Personal care, History, Life hacks, Law, San Francisco, Feminism, Geography, Minnesota, Sports, Surfing, L.A., Toys, Politik, Housing, Quizzes, Berlin
Music
Musicians, Streams, Boston, Events, Making, Labels, House, Business, L.A., Mailing lists, History, Good tracks, Videos, Shopping, Mixes, Hip-hop, Mp3s, Reviews, Booking, Lyrics
People
Stories, Heroes, Friends, Enemies, Me, ADD, Meditation, Exercise, Life hacks, Languages, Health, Subcultures, Working with, Weblogs, MOTAS, Gossip, Vocations, Buddhism, Family
Commerce
Real Estate, Microfinance, Personal finance, Insurance, Web, Non-profit, IP Law, Personal services, International Development, Investing, Marketing and CRM, Management consulting, Macroeconomics, Shopping, Taxes
Arts
Comix, Rhetoric, Spoken Word, Sculpture, Movies, Burning Man, Outlets, Literature, iPad bait, Animation, Humor, Desktop wallpaper bait, Poetry, Visual, Events
Design
Web, Cool, IA, Data visualization, Tools, Process, Architecture, Furniture, Presentations, Algorithmic, Type, User experience
Science
Zoology, Physics, Statistics and Data, Networks, Psychology, Environment, Cognition
Travel
Kingdom of Siam, Kenya, Vagabond '08, Uganda