SlideShare a Scribd company logo


http://www.ted.com/talks/lang/eng/philip_zi
mbardo_on_the_psychology_of_evil.html
AO1
•

•

Deindividuation – to lose one’s sense of individuality and
identity.
Can occur in 2 main ways –
– Becoming part of a crowd
– Identifying with a particular role ( often aided by wearing
uniform or mask)

Can be used to explain aggression which occurs when in a group.
AO1:
Le Bon (1896) – individuals are more likely to behave in
aggressive manner when part of a large anonymous
group.
• A collective mindset is created and the group can become
a ‘mob’.
Individuals feel less
identifiable in a group, so the
normal constraints that
prevent aggressive behaviour
may be lost. The shared
responsibility for action
reduces individual guilt.




Deindividuation occurs
when self awareness is
blocked by
environmental events.
Critical factors include :

◦ Strong feelings of group
The deindividuated individual is
membership
trapped in the moment, perception of ◦ Increased levels of arousal
time is distorted and they are unable to
◦ Focus on external events
consider consequences.
◦ Feeling of anonymity (e.g.
Wearing a uniform)


http://video.google.co.uk/videoplay?docid=1
761062858590826090&ei=jpNNS7a5OorNQbTwt3CBw&q=tiananmen+square&hl=en&vi
ew=3#
Increased arousal

External focus

Strong group feelings

Sense of anonymity

Reduced self awareness

DEINDIVIDUATION


Zimbardo (1973) Stanford Prison experiment

You have 10 minutes to use this
classic experiment to illustrate
deindividuation theory and apply
it to the guards aggressive
behaviour.
Is it relevant
that all the
participants
were
women?
•
•

•
•
•

•
•
•

Explored deindividuation in female undergraduates.
Group 1 dressed in white lab coats with hoods over their faces
Group 2 wore large name tags.
All pps observed a woman being interviewed and evaluated her
performance by administering electric shocks.
Condition 1 – pleasant interviewee, condition 2 – obnoxious
Group 2 shocked the obnoxious interviewee more than the
pleasant one
Group 1 (deindividuated) shocked both interviewees equally.
Zimbardo concluded that deindividuation increased aggression,
making it indiscriminate and not at all influenced by individual
characteristics.








Aggression in handball
Deindividuation was created
by giving one team orange shirts, whilst other team
wore own clothes.
In boy teams, uniformed teams were more aggressive
than non-uniform.
In girl teams, no differences found.
Researchers concluded that uniform > loss of
individuality > deindividuation.
Is there an alternative

explanation? How can
the gender difference
be explained?




Watson (1973) – 24 cultures.
Warriors in face and body paint more
likely to kill, mutilate and torture
captured prisoners.

• Silke (2003) – violent assaults in
Northern Ireland.
• 206 / 500 cases carried out by offenders
wearing masks or disguises.
•Anonymous attackers were more prolific
and inflicted more serious physical
injuries than identifiable attackers.




Using Cardwell draw a spider diagram or
make notes to outline some of the problems
with deindividuation theory.
E.g.
It has been found that male and female groups
respond differently under deindividuation
conditions.
An increase in aggression has only been found
in ‘all male’ groups.
Evidence suggests that males may be more
prone to aggressive behaviour when
disinhibited, than females.






Importance of norms of the group e.g. Ku
Klux Klan versus nurses uniforms
Mixed evidence

Deindividuation can also increase the
incidence of prosocial behaviour.


Crowd baiting



Cyber bullying?


Gender bias



Real world application



Cross cultural validity

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20240605 QFM017 Machine Intelligence Reading List May 2024
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Deindividuation (Social psychological theories of aggression) A2

  • 1.
  • 3. AO1 • • Deindividuation – to lose one’s sense of individuality and identity. Can occur in 2 main ways – – Becoming part of a crowd – Identifying with a particular role ( often aided by wearing uniform or mask) Can be used to explain aggression which occurs when in a group.
  • 4. AO1: Le Bon (1896) – individuals are more likely to behave in aggressive manner when part of a large anonymous group. • A collective mindset is created and the group can become a ‘mob’. Individuals feel less identifiable in a group, so the normal constraints that prevent aggressive behaviour may be lost. The shared responsibility for action reduces individual guilt.
  • 5.   Deindividuation occurs when self awareness is blocked by environmental events. Critical factors include : ◦ Strong feelings of group The deindividuated individual is membership trapped in the moment, perception of ◦ Increased levels of arousal time is distorted and they are unable to ◦ Focus on external events consider consequences. ◦ Feeling of anonymity (e.g. Wearing a uniform)
  • 7. Increased arousal External focus Strong group feelings Sense of anonymity Reduced self awareness DEINDIVIDUATION
  • 8.  Zimbardo (1973) Stanford Prison experiment You have 10 minutes to use this classic experiment to illustrate deindividuation theory and apply it to the guards aggressive behaviour.
  • 9. Is it relevant that all the participants were women? • • • • • • • • Explored deindividuation in female undergraduates. Group 1 dressed in white lab coats with hoods over their faces Group 2 wore large name tags. All pps observed a woman being interviewed and evaluated her performance by administering electric shocks. Condition 1 – pleasant interviewee, condition 2 – obnoxious Group 2 shocked the obnoxious interviewee more than the pleasant one Group 1 (deindividuated) shocked both interviewees equally. Zimbardo concluded that deindividuation increased aggression, making it indiscriminate and not at all influenced by individual characteristics.
  • 10.      Aggression in handball Deindividuation was created by giving one team orange shirts, whilst other team wore own clothes. In boy teams, uniformed teams were more aggressive than non-uniform. In girl teams, no differences found. Researchers concluded that uniform > loss of individuality > deindividuation. Is there an alternative explanation? How can the gender difference be explained?
  • 11.   Watson (1973) – 24 cultures. Warriors in face and body paint more likely to kill, mutilate and torture captured prisoners. • Silke (2003) – violent assaults in Northern Ireland. • 206 / 500 cases carried out by offenders wearing masks or disguises. •Anonymous attackers were more prolific and inflicted more serious physical injuries than identifiable attackers.
  • 12.   Using Cardwell draw a spider diagram or make notes to outline some of the problems with deindividuation theory. E.g.
  • 13. It has been found that male and female groups respond differently under deindividuation conditions. An increase in aggression has only been found in ‘all male’ groups. Evidence suggests that males may be more prone to aggressive behaviour when disinhibited, than females.
  • 14.    Importance of norms of the group e.g. Ku Klux Klan versus nurses uniforms Mixed evidence Deindividuation can also increase the incidence of prosocial behaviour.
  • 16.  Gender bias  Real world application  Cross cultural validity