Class Notes (834,026)
Canada (508,290)
Brock University (12,083)
Psychology (853)
PSYC 2F23 (47)
Lecture

lec 5

2 Pages
125 Views
Unlock Document

Department
Psychology
Course
PSYC 2F23
Professor
Martin Kusy
Semester
Fall

Description
Lecture 5 PSYA02 Notes • Intelligence • Intelligence = general cognitive ability; Spearman’s g, the substantial covariation among diverse measures of cognitive ability; the general factor that typically accounts for about 40% of the total variance of diverse cognitive tests • More is now known about the genetics of individual differences in intelligence than about any other trait, behavioral or biological • Heritability • Heritability = the proportion of observed trait variance in a group of individuals that can be accounted for by genetic variance • At the level of the individual there is no nature-nurture debate; only at the population level can we disentangle genetic and environmental effects • Indexed by heritability quotient range from 0 to 1. 1 means trait is influenced solely by inheritance and 0 means trait is not influenced by inheritance. • Twin Studies • Out of 83 births, approx. 1 pair of twins are born. • Are identical (MZ) twins more similar to each other than fraternal (DZ) twins? • If twins are no more similar than fraternal twins, then genetics does not play a significant role in heritability and so on. • Heritability = 2(r mz – rdz • One limitation of twin studies is their assumption of equal environments • Adoption Studies • To whom are adopted children more similar — their biological or adoptive parents? • If a child resembles adoptive parent more than biological parent than there is an environmental role in the determination of an individuals character. • Adoption studies circumvent the assumption of equal environments • One limitation of adoption studies is their assumption of unequal environments • Genetics • In studies of more than 10,000 twin pairs: • MZ twin r = .86 • DZ twin r = .60
More Less

Related notes for PSYC 2F23

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit