genetic factors Flashcards
what did twin studies find
50% mz twins physicaly agressive
19% dz physicaly agressive
28% mz verbally agressive
7% dz verbally agressive
who conducted twin studies
coccaro et al 1997
who looked into adoption studies
rhee and waldman et al 2002
what did adoption studies find
meta analysis
41% genetic influence in aggression with biio parents and adoptees.
what gene is linked to aggression
the maoa gene aka the warrior gene due to 50% of nz men having it
what does the maoa gene do
regulates serotonin
when a variant it lowers serotonin leading to aggression
what is gene enviroment interactions in aggression
maoa gene only variant when linked with childhood trauma
what is a strength of genetic factors
mertins et al 2011
variations in maoa gene money sorting task
high activity gene was less aggressive
what are two limitations of genetic factors
complex link between maoa and serotonin as the gene disrupts serotonin not lowers so should be high levels if variant
twin studies problems lowers validity
dz have diff enviroments meaning that could influence
concordance inflated
whats the issues and debates for genetic factors
nature nurture as there is links to childhood trauma but there is a genetic direct cause link
