Which of the following presidents had the most consistent skill at winning over media support?

A researcher wants to study the effects of attention on ability to perform a task. The participant's attention is recorded by a research assistant that the participant knows is watching. A problem with this design is

A) Measurement reactivity. B) Participant observer bias. C) Unobtrusive measurement. D) Obtrusive participant measurement.

According to economic structuralism, the role of the state is to

a. act as an umpire among the various classes. b. serve the interests of the capitalist class. c. develop regularities that level the playing field. d. support the interests of the workers.