PSYCH211 Lecture Notes - Lecture 4: Twin Study, Intelligence Quotient, Heritability
29 Jan 2017
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Lecture 4: nature, nurture and development (jan 17th) 2 premises: to extent that genetics is important: Genotypic similarity phenotypic similarity: to extent environment is important: Iq, height, psychotic, how much tv you watch etc. Problem: families may share or differ in environment! Adopted person and adopted family (e. g. parents, siblings) Adopted person and biological family (e. g. parents, siblings) Say that the adopted person is much more similar to its adopted family instead of its biological family thus this is saying that it has to do with environment and not genes. Height would be more similar to biological family and not really adopted family. If mz twins show stronger correlations, implies importance of genetics. If correlation is 0, this means that there is no correlation, no relatio(cid:374)ship. If (cid:272)orrelatio(cid:374) is (cid:1005) or (cid:1004). 9999, this (cid:373)ea(cid:374)s it"s perfe(cid:272)tl(cid:455) (cid:272)orrelated. Statistical estimate of proportion of variance on a trait among individuals in a given population that is attributable to genetic differences.
