September 20, 2011
"Even people who only run randomized experiments could benefit from a little more depth than the sophomore-year slogan that seems to be all some researchers (AHEM, Reviewer B) have been taught about causation."

— Sanjay Srivastava, Do not use what I am about to teach you.

7:07am  |   URL: http://tmblr.co/Z23PQy9j-XyB
(Notes: 9)
  
Filed under: SEM statistics 
February 17, 2011
"The p-value reported by R is also very, very low, which seems good, but remember all this really means is “you’d have to be crazy to think a flat line fit better than one with a slope."

— Cosma Shalizi, Testing Parametric Regression Models with Nonparametric Smoothers

7:24am  |   URL: http://tmblr.co/Z23PQy37BGAa
Filed under: statistics 
January 6, 2011
"The idea that personality traits are the validity weaklings of the predictive panoply has been reiterated in unmitigated form to this day."

—

[P]ersonality psychologists should not apologize for correlations between .10 and .30, given that the effect sizes found in personality psychology are no different than those found in other fields of inquiry.

Brent W. Roberts, Nathan R. Kuncel, Rebecca Shiner, Avshalom Caspi, and Lewis R. Goldberg. The Power of Personality: The Comparative Validity of Personality Traits, Socioeconomic Status, and Cognitive Ability for Predicting Important Life Outcomes Perspectives on Psychological Science 2007 2: 313-345, doi:10.1111/j.1745-6916.2007.00047.x

(Source: pps.sagepub.com)

10:21am  |   URL: http://tmblr.co/Z23PQy2SH6C6
Filed under: statistics