Genes and Behaviours Flashcards
(32 cards)
Moscovitch and Wincour (1997)
object agnosia
CK sustained a head injury
motor, cognitive and memory deficits
normal facial recognition, but couldn’t recognise objects
Archimbaldo effect
also, inverted faces were harder to recognise - upright faces recognised holistically, but inverted faces were recognised part-based
therefore recognition of inverted and upright faces are not recognised in the same way
controls - 71%
CK - 14%
Butterworth and Dingle (2004)
prosopagnosia
recognises objects but not faces
life long difficulties recognising faces
identity, emotion, and gender
controls - 21/25
Edward - 3/25
greebles - similar to faces. introduced to 20 greebles and names
Edward performed as well as controls on learning the greebles and names
NcNeil and Warrington
WJ had profound prosopagnosia after a stroke - acquired
could identify his sheep more readily than people
is recognition normally distributed or dichotomous?
it is normally distributed. not either a super recogniser or no facial recognition
it is a continuum
Russell and Duchain
focus on recognition
Cambridge faces - before they were famous test
people normally dislike TV
Zhu et al (2010)
MZ and DZ twins
facial recognition ability (FRA)
heritability = 28%
face inversion effect = 34.8%
composite face effect - align Tony Blair and George Bush = 31%
DeRenzi
fusiform face area (FFA)
Anti social personality disorder
no one is born a psychopath - look at reasons how or why someone becomes a psychopath
Frick
early behavioural warning signs of children at risk of psychopathology - callous unemotional traits
Frick and Viding
low callous unemotional traits - aggressive when under threat, feel bad when hurting others, high levels of anxiety. hostile attribution bias, oversensitivity to perceived anger, maybe experienced family violence, vigilant to potential threats
high callous unemotional traits - proactive aggressive, lack of guilt, not worrying about hurting others, low levels of anxiety. problems recognising fear and distress, less responsive to punishment, normally good TOM, more likely to sympathise with those who have been through similar experiences. may predispose children to antisocial behaviour
hard to look at in children, as to some extent all lack empathy
origins of antisocial behaviour
genetics (A), shared environment (C) and non shared environment (E)
high callous = 1/5 E, 4/5 A
low callous = 1/3 A, 1/3 C, 1/3 E
there are risk genes for having a low unemotional trait
Viding
low amygdala activation in those with high callous unemotional traits when looking at a fear inducing task
Sebastian
low amygdala activity in those with high callous unemotional traits when looking at faces of people in distress
antisocial behaviour causes
should look at both social and biological factors that affect the onset of unemotional traits
Waltham Forest
boys 11.6%
girls 8.6%
left handers
historical handedness
palaeolithic 77% left handed, 23% right handed - blowing hand shapes onto the stone walls
Toth - early human stone tools
maybe biological in that case
animals and handedness
mice - equal 50:50
Plato and Aristotle
nurture vs. nature
Foetal Handedness
Hepper et al - preferential thumb sucking. there at birth … it is genetic
handedness in families
McManus and Bryden - Mendelian genetic model - autosomal genes
actually was disproven
twins and handedness
can end up with different handedness - but identical genetics
Manhatton plot
about 40 genes affecting handedness
therefore there is no gene for handedness
75.3% vs. 75.4% for MZ and DZ twins
cerebral lateralisation
Broca - Lebourgne, aphasia,
fMRI shows that face and emotional processing is in the right hemisphere, but what the Brocas area does is really unclear
how do we know where language is located?
dichotic listening
stroke/ brain damage etc
fMRi is expensive, and slow, and there are ethical problems
Knecht et al (2000)
middle cerebral arteries blood flows through into frontal lobe
blood flow better in left hemisphere compared to the right hemisphere
some people process language in the right side of the brain
which is the dominant side of brain tends to be the opposite of what your handedness is