What do most Americans consider the biggest barrier to people's expression of their views?

A researcher predicts that tennis professionals will play better in front of an audience. Less capable tennis players, however, are expected to do better without an audience. The researcher

a. is predicting a main effect for the audience variable. b. is predicting a main effect for ability of the tennis player. c. expects an interaction effect to occur. d. is using a mixed design.

Thomas Jefferson was the author of the pamphlet entitled Common Sense, which attacked King George III as a "Royal Brute," thus stirring the colonies toward declaring their independence

Indicate whether the statement is true or false