A researcher decides that the occurrence of a particular viewpoint from audience members in a study is a relevant unit to measure in a content analysis study. This viewpoint is described and noted in which one of the following?

John Milton with his argument for the marketplace of ideas was an early __________ thinker

Fill in the blank with correct word

Which of the following is not a threat to internal validity?

a. ecological isomorphism b. spurious relationships c. selection bias d. attrition e. repeated testing