The "hero procedure" refers to a contingency in which an individual, or small group, earns a reward for a class. This procedure is an example of what type of group contingency?
Limited Time Offer
25%
Off
Sylvie
2 days agoArlette
17 days agoTemeka
18 days agoVannessa
20 days agoMargo
22 days agoDominque
23 days agoRocco
26 days ago