Social change is when a whole society adopts a new belief or behaviour which then becomes widely accepted as the norm.
The augmentation principle suggests that when a minority appears willing to suffer for their beliefs, they are perceived to be more committed and so are taken more seriously by the majority.
The snowballeffect is when a minority first has a small effect, which then spreads as more people adopt the minority's beliefs over time, until it reaches a tipping point where socialchange has occured.
Social cryptoamnesia is when people have a memory that socialchange has occured but cannot remember details about how it happened.
A strength of conformity and normative social influence as an explanation for social change comes from research support from Nolan. Researchers hung messages on doors in a neighbourhood, asking them to saveenergy. Those that received a message referring to the majority'sbehaviour saved the mostenergy.
A strength of minority influence as an explanation for social change comes from research support from Moscovici. However this evidence is limited as only 8 % of the majority was influenced by the minority, and the research lacks externalvalidity because the task was artificial.