Joelle was conducting a six-month experiment in which she was interviewing members of the community to determine if a new police-community outreach program increased positive perception of police officers amongst the community. Four months into the experiment, a scandal regarding police brutality hit the news in a neighboring city, which had an effect upon this community's perception of police
Which source of internal invalidity does this example reflect?
a. maturation.
b. instrumentation.
c. compensation.
d. selection biases.
e. history.
E
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In percentage terms, the U.S. spends less on health care than any other country in the world.
Answer the following statement true (T) or false (F)
With industrialism losing ground, scholars expect the British lower class to:
A) contract B) expand C) stay about the same size D) divide into an upper and lower class.
The process of denying certain opportunities and equal rights or privileges to individuals and groups is known as ________
a. prejudice b. assimilation c. discrimination d. ethnocentrism
When the normal-curve assumption is strongly violated, the ordinary t test:
A) resembles an analysis of variance B) is conducted using Z scores instead of t scores C) gives an incorrect result D) is adequate