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Changing attitudes and behaviour

Joanne R. Smith

Anna Rabinovich

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What are norms?

• Norm = the accepted or implied rules of how

individuals and group members should and do

think and behave

• Two types of norms:• What other people do (descriptive norm)

• What other people approve of (injunctive norm)

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Descriptive norms and change

• Descriptive norms form the basis of manybehaviour change campaigns

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Descriptive norms and change

• But normative messages may create a psychological

backlash that undermines campaign efforts• Descriptive norm messages can actually increase levels of

problem behaviour

“Many people

are doing this

bad thing”

“Many people

are doing this”

“I won’t be doing

the right thing”

0

1

2

3

4

5

6

7

8

9

1 2

Pe

rce

nta

ge

of

en

vir

on

me

nta

l th

eft

“Many past visitors have

taken the petrified wood”

“Many past visitors have

left the petrified wood”

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Injunctive norms and change

• Can we use injunctive norms to effect behaviour

change?

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Injunctive norms and change

• But injunctive norms may also produce a psychological

backlash that undermines campaign efforts• Injunctive norm messages can actually decrease levels of

desired behaviour

“You should be

doing X”

“We’re not

doing X”“I won’t be

doing X”

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5

6

1 2

Pro

-en

vir

on

me

nta

l in

ten

tio

ns

“85% think you

should do X”“85% are doing X”

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Norms and change

• So, what is the message for behaviour change agents?

• 1. Framing of normative messages must be correct

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Norms and change

• So, what is the message for behaviour change agents?

• 2. Harness the power of both descriptive and injunctive

norms

4.5

5.5

6.5

IN absent IN present

Su

n p

rote

cti

on

be

ha

vio

ur

DN absent DN present

DN = Most do X

IN = Most approve

of X

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Summary and Implications

• Communicating that a behaviour is normative for

a group of people can produce desired behaviour

change

• “We engage in the behaviour and we approve of the

behaviour”

• By linking norms to different identities, we can

harness the power of both norms and social

identities to promote positive behaviour

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Self-categorization theory

• People adopt the same norms and values that areascribed to the groups they belong to

• Group norms and values are defined on the basisof comparison with other groups

• What we conclude about ourselves depends oninter-group comparative context

I am like

others in

my group

We are not

like them

I am not like them

They are “green” We are NOT “green”

I am not “green”,

I won’t behave

sustainably

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Hypotheses

• Positive comparison leads to increase in env.

behaviour

• Negative inter-group comparison leads to

decrease in env. behaviour

Comparison with

un-environmental

group

“Green” in-group

stereotype

Pro-

environmental

behaviour

Comparison with

pro-environmental

group

“Non-green” in-

group

stereotype

Un-

environmental

behaviour

13• In-group environmental stereotype is stronger in the positive

comparison context

3.4

3.5

3.6

3.7

3.8

3.9

4

4.1

4.2

4.3

4.4

American control Swedish

in-g

rou

p e

nv

iro

nm

en

tal

ste

reo

typ

e

Comparative context: group stereotype

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Comparative context: intentions

2.5

2.6

2.7

2.8

2.9

3

3.1

3.2

3.3

3.4

American control Swedish

en

vir

on

me

nta

l in

ten

tio

ns

• Environmental intentions are stronger in the positive

comparison context

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Applied implications

• Inter-group comparison standard can be used

to stimulate desirable behaviour

• Negative comparison may undermine

desirable intentions

• Desirable changes can be stimulated by

providing a positive comparison standard

• Behaviour change does not have to start at an

individual level…

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