Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Results of fitting DF models to data from full, higher IQ and lower IQ samples1
| B2 / B5 / B8 | p | |
|---|---|---|
| Basic model – full sample | B2 = .61 ± .06 | 0.00 |
| Extended basic model, continuous, linear– full sample | B5 = .10 ± .06 | ≤ .04 |
| Higher IQ | B2 = .75 ± .12 | < .001 |
| Lower IQ | B2 = .50 ± .10 | < .001 |
| Extended basic model, dichotomous, IQ groups | B5 =.25 ± .15 | ≤.045 |
| Extended basic model, continuous, quadratic – full sample | B8 = .03 ± 04 | ≥ .45 |
Upper and lower 25% of full scale IQ distribution
