Kenny performed an experiment on the effects of after-school educational activities on students' academic performance. His experimental group involved after-school educational activities and his control group involved after-school non-educational activities. The children in the control group felt left out and gave up on the experiment. Which source of internal invalidity is reflected?
a. instrumentation
b. testing
c. statistical regression
d. demoralization
e. history
D
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Discuss the five social revolutions and their causes
What will be an ideal response?
Suppose you are living during a period of time in which a major new invention sparks a whole new industry and many new jobs are created
This new enterprise, however, renders some existing jobs obsolete, and the workers in those jobs become unemployed. Thus, about as many people move down the class ladder as move up. This is an example of __________ mobility. a. exchange b. interchange c. intergenerational d. structural
Most of the time, other actors we encounter will:
a. share our frames. b. misjudge our frames. c. deny our frames. d. renegotiate our frames.
Hunting and gathering societies had a(n) __________ economy; they lived off the land and had few belongings.
a. subsistence b. modern c. pastoral d. industrial