Psychology 1000 Lecture Notes - Down Syndrome, Phenylalanine, Tay–Sachs Disease

• School: Western University
• Department: Psychology
• Course: Psychology 1000
• Professor: Dr.Mike

Document Summary

Video: nature and nurture: the study of twins. Study the difference between identical twins and fraternal twins. Heritability of intelligence family relationship studies need to know the genetic relationship of the 2 ppl that i"m measuring identical twins-100% (share all genetic material) fraternal twins- 50% (just like other siblings) Compare identical twins with other groups- be able to know how much genes influence the intelligence. Consider: jim lewis & jim springer: raised in different families, reunited in age of 39, both have similar medical history, like math, hated spelling many similarities , genetics plays a very important role in them. Believed that intelligence is caused by genes. Measure simple motor and sensory abilities-reaction test. Believes that intelligence was unitary (mental quickness) Results disappointing- there is no absolute correlation between genes and intelligence. Sir cyril burt large scale study of twins reared apart (separted in 2 different environments) Reports h^2 approaching 1. 0 (intelligence is due to genes and genes alone)