Iv for infants include both verbal nonverbal (performance) measures. Scores at age 8 correlate with scores at age 18 (. 70) Education iq scores from when a child is in grades 1,2,3 can predict their level of education in the future as well as their future job. Identical twins" iq correlated more than fraternal iq might be genetic. Adopted children"s iqs resemble biological parents more than adopted parents. Reminder: a socio-cultural perspective prioritizes importance of culture, social relations, social structure, social inequality. Kpelle in liberia: western researchers visited liberia and wanted to do iq testing. Gave people food, tools, clothing, and containers, and asked them to organize them logically. They organized things in order of function (eg. orange with knife). Basil bernstein: worked in england and teaching boys (lower class, considered less intelligent), he found they weren"t less intelligent, but their language was much different. He found that middle class boys had a broader, more elaborated speech.