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The Dissonance
Theory
 There is a tendency for individuals to
seek consistency among their
cognitions (i.e., beliefs, opinions) so it
is also called cognitive dissonance
theory.
Historical Background
 Leon Festinger and Carlsmith
formulated the theory of dissonance in
the mid-1950
 The theory was appeared in 1957
Festinger says:
 when an individual holds two or more
elements of knowledge that are
relevant to each other, a state of
discomfort is created.
Further:
 He suggested that people have an
inner need to ensure that their beliefs
and behaviors are consistent.
Inconsistent or conflicting beliefs lead
to disharmony, which people strive to
avoid.
Area of theory:
1. Forced compliance behavior,
2. Decision-making,
3. Effort
1. Forced Compliance
Behavior
 When someone is forced to do
(publicly) something they (privately)
really don't want to do, dissonance is
created between their cognition (I
didn't want to do this) and their
behavior (I did it).
How could reduce it?
By re-evaluating their
attitude to what they
have done.
Historical example
 , Festinger and Carlsmith (1959)
asked participants to perform a series
of dull tasks (such as turning pegs in a
peg board for an hour).
 Aim
 Festinger and Carlsmith (1959)
investigated if making people perform
a dull task would create cognitive
dissonance through forced compliance
behavior.
Method:
 In their laboratory experiment, they used
71 male students as participants to
perform a series of dull tasks (such as
turning pegs in a peg board for an hour).
 They were then paid either $1 or $20 to
tell a waiting participant (a confederate)
that the tasks were really interesting.
Almost all of the participants agreed to
walk into the waiting room and persuade
the confederate that the boring
experiment would be fun.
Conclusion:
 Being paid only $1 is not sufficient
incentive for lying and so those who
were paid $1 experienced dissonance.
They could only overcome that
dissonance by coming to believe that
the tasks really were interesting and
enjoyable. Being paid $20 provides a
reason for turning pegs, and there is
therefore no dissonance.
How could it reduce?
 Dissonance will need to be
reduced by re-evaluating their
attitude to what they have done.
2. Decision Making
Life is filled with
decisions, and decisions
(as a general rule)
arouse dissonance.
How could reduce it?
 To increase the attractiveness of the
chosen alternative and to decrease
the attractiveness of the rejected
alternative. This is referred to as
"spreading apart the alternatives."
3. Effort
 It also seems to be the case that we
value most highly those goals or items
which have required considerable
effort to achieve.
 we spent a great effort to achieve
something and then evaluated it
negatively.
How could reduce it?
we are motivated to try to
think that the task turned
out well.
Historical example:
 Experiment:
A classic dissonance experiment by Aronson
and Mills (1959) demonstrates the basic idea.
 Aim
To investigate the relationship between
dissonance and effort.
Method
 Female students volunteered to take part in a
discussion on the psychology of sex. In the
'mild embarrassment' condition, participants
read aloud to a male experimenter a list of
sex-related words like 'virgin' and 'prostitute.'
 In the 'severe embarrassment' condition, they
had to read aloud obscene words and a very
explicit sexual passage. In the control
condition, they went straight into the main
study. In all conditions, they then heard a very
boring discussion about sex in lower animals.
They were asked to rate how interesting they
had found the discussion, and how
interesting they had found the people
involved in it.
Conclusion:
 If a voluntary experience which has
cost a lot of effort turns out badly,
dissonance is reduced by redefining
the experience as interesting. This
justifies the effort made.
Daily life examples

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The dissonance theory

  • 2. There is a tendency for individuals to seek consistency among their cognitions (i.e., beliefs, opinions) so it is also called cognitive dissonance theory.
  • 3. Historical Background Leon Festinger and Carlsmith formulated the theory of dissonance in the mid-1950 The theory was appeared in 1957
  • 4. Festinger says: when an individual holds two or more elements of knowledge that are relevant to each other, a state of discomfort is created.
  • 5. Further: He suggested that people have an inner need to ensure that their beliefs and behaviors are consistent. Inconsistent or conflicting beliefs lead to disharmony, which people strive to avoid.
  • 6. Area of theory: 1. Forced compliance behavior, 2. Decision-making, 3. Effort
  • 7. 1. Forced Compliance Behavior When someone is forced to do (publicly) something they (privately) really don't want to do, dissonance is created between their cognition (I didn't want to do this) and their behavior (I did it).
  • 8. How could reduce it? By re-evaluating their attitude to what they have done.
  • 10. , Festinger and Carlsmith (1959) asked participants to perform a series of dull tasks (such as turning pegs in a peg board for an hour). Aim Festinger and Carlsmith (1959) investigated if making people perform a dull task would create cognitive dissonance through forced compliance behavior.
  • 11. Method: In their laboratory experiment, they used 71 male students as participants to perform a series of dull tasks (such as turning pegs in a peg board for an hour). They were then paid either $1 or $20 to tell a waiting participant (a confederate) that the tasks were really interesting. Almost all of the participants agreed to walk into the waiting room and persuade the confederate that the boring experiment would be fun.
  • 12. Conclusion: Being paid only $1 is not sufficient incentive for lying and so those who were paid $1 experienced dissonance. They could only overcome that dissonance by coming to believe that the tasks really were interesting and enjoyable. Being paid $20 provides a reason for turning pegs, and there is therefore no dissonance.
  • 13. How could it reduce? Dissonance will need to be reduced by re-evaluating their attitude to what they have done.
  • 14. 2. Decision Making Life is filled with decisions, and decisions (as a general rule) arouse dissonance.
  • 15. How could reduce it? To increase the attractiveness of the chosen alternative and to decrease the attractiveness of the rejected alternative. This is referred to as "spreading apart the alternatives."
  • 16. 3. Effort It also seems to be the case that we value most highly those goals or items which have required considerable effort to achieve. we spent a great effort to achieve something and then evaluated it negatively.
  • 17. How could reduce it? we are motivated to try to think that the task turned out well.
  • 18. Historical example: Experiment: A classic dissonance experiment by Aronson and Mills (1959) demonstrates the basic idea. Aim To investigate the relationship between dissonance and effort.
  • 19. Method Female students volunteered to take part in a discussion on the psychology of sex. In the 'mild embarrassment' condition, participants read aloud to a male experimenter a list of sex-related words like 'virgin' and 'prostitute.' In the 'severe embarrassment' condition, they had to read aloud obscene words and a very explicit sexual passage. In the control condition, they went straight into the main study. In all conditions, they then heard a very boring discussion about sex in lower animals. They were asked to rate how interesting they had found the discussion, and how interesting they had found the people involved in it.
  • 20. Conclusion: If a voluntary experience which has cost a lot of effort turns out badly, dissonance is reduced by redefining the experience as interesting. This justifies the effort made.