Investigating Human Behaviour - Twin Studies by Bridie Chatfield https://padlet.com/bridiechatfield1/b395bkr271t8 :) en-us 2019-11-27 08:43:58 UTC 2019-11-27 10:50:58 UTC hello@padlet.com https://padlet.net/icons/png/1f9d0.png Equations https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417072991 rmz = A + C
rdz = ½A + CA
It is therefore twice the difference between identical and fraternal twin correlations. C is the MZ correlation minus this estimate of A. Factor E is 1 − rmz:'A' is twice the difference between
A = 2 (rmz − rdz)
A and C, E can be estimated by subtracting this correlation from 1 
E = 1 − rmz
C = rmz − A
]]> 2019-11-27 10:16:17 UTC https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417072991 https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417080356 2019-11-27 10:39:32 UTC https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417080356 https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417080677 Stephane Paquin, who works under supervision of Eric Lacourse and Mara Brendgen did a study on 555 sets of twins, comparing proactie and reactive aggressive behaviour. They revealed that at age 6 both types of aggression have most of the same factors, however the aggression in the children usually fades away as they age. 
The increase or decrease in aggression in the children is determined around the ages of 6 and 12, and are influenced by many environmental factors instead of genetics. ]]> 2019-11-27 10:40:27 UTC https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417080677 Toddlers' aggression strongly associated with genetic factors https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417081320 This case study goes against all the case studies for the Twin Study]]> 2019-11-27 10:42:33 UTC https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417081320 Difference inbetween Monozygotic and Dizogytic https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417082153 Monozygotic means the twins originated from the same embryo -- they are genetically identical. Dizogytic means they developed in separate embryos, meaning they are not identical.]]> 2019-11-27 10:45:20 UTC https://padlet.com/bridiechatfield1/b395bkr271t8/wish/417082153