tends to take place when the individual is unsure and lacks knowledge and looks to the group for guidance
take place in a crisis situation when a decision needs to be made quickly and the assumption follows "the group knows what to do"
more likely to be affected by ISI if they are insecure about what the groups opinions are (more about information-processing than NSI)
linked to internalisation
NSI
Normative Social Influence
tends to take place when the individual wishes to be accepted by a group
when an individual is trying to fit in with the group's norms
Someone is more likely to be affected by NSI if they feel that their own behaviour/attitudes don't align with the group and this causes them anxiety which in turn may lead them to adjust to the group ( more emotionalthan ISI)
linked to compliance and identification
Examples - ISI
Examples of ISI include:
On the first day of a new job an individual follows the group at lunchtime as their assumption is that the group knows where the canteen is
Someone collapses in the street but no-one stops to help so the individual assumes that it's not serious (after all, if it was a serious emergency then someone would stop to help, wouldn't they?)
Examples - NSI
Examples of NSI include:
Agreeing with the group that the new film is bad while secretly having enjoyed it
'Ghosting' a schoolfriend because this is what everyone else in the group is doing but feeling bad about it and believing that this is cruel and wrong
Evaluation
Strengths + Weaknesses
There is good research support for both ISI and NSI e.g. Smith & Bond's (1996) meta-analysis which gives both explanations validity
NSI has good application to global/historical events e.g. the behaviour of normal German people involved in the Holocaust
It is often difficult sometimes to differentiate between NSI and ISI (e.g. in Asch's research both explanations could apply)
Both explanations cannot explain why some people refuse to or resist conformity
Deutsch + Gerard
identified ISI + NSI as motivating factors
Jenness
A piece of supporting research for ISI is Jenness. In Jenness’ study participants were asked to make independent judgements about the number of jellybeans in a jar and make an estimate of what number of jellybeans were in the jar and then afterwards discuss their estimates in a group. After this discussion, participants then made another individual private estimate. Jenness found that this second private estimate moved closer to the group estimate and that females typically conformed more.