When an independent variable would endanger a human participant's health, we must conduct the research by comparing groups that already have differing degrees of the variable of interest. These are known as _____ experiments

According to Sigmund Freud, children experience _____ when they are repeatedly prevented from expressing their id impulses.

A)realistic anxiety B)neurotic anxiety C)moral anxiety D)situation anxiety

Megan is always reminding her son Andrew not to talk with his mouth full. One morning, Andrew reminds her not to talk with her mouth full. This situation most resembles ________

a. the Ben Franklin effect b. cognitive dissonance c. the hypocrisy-induction paradigm d. justification of effort