How do public opinion polls work? And, more importantly, are they accurate? Jason Robert Jaffe reveals the complexities and biases of polls and provides tips on how to think about polls as we make everyday decisions. [4:25]

This site is useful because it offers a database of over 300,000 questions asked on surveys since the 1930s. Also contains Latin American and Japanese data bank retrieval system as well. Listing of general social surveys 1972-1998.