On the first day of class, Professor Wallace tells her geography students that pop quizzes will be given at unpredictable times throughout the semester. Clearly, studying for Professor Wallace's surprise quizzes will be reinforced on a schedule.
a. fixed-interval
b. variable-interval
c. variable-ratio
d. fixed-ratio

This passage would suggest that sudan might have a a) democracy. b) dictatorship. c) command economy. d) communist government.

Why does c. wright mills identify critical thinking as one of the most important criteria for the development of intellectual craftsmanship? why is constantly being aware of the biased nature of your reactions and interactions (what c. wright mills calls self-reflexive) key to the development of that critical thinking? finally, why is keeping a file important, how can it lean to intellectual curiosity which can foster critical thinking and to develop a keen analytical mind?

Abrief, "first-step" presentation of a work to be completed is called a