multiple choice questions for Objective 2

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Chapter 9

This activity contains 7 questions.

Which of the following is a necessary step in conducting experimental research?

	Manipulation of an independent variable to compare two approaches.
	Selection of measuring instruments.
	Creating a hypothesis stating a causal relationship between variables.
	All of these

Which of the following helps to establish the representativeness of the subjects in groups?

	Random assignment
	Selecting preexisting groups
	Random selection
	Manipulating the independent variable

Which of the following helps establish equivalent groups?

	Random assignment
	Selecting preexisting groups
	Random selection
	Manipulating the independent variable

Which of the following is a common comparison used in experimental research designs?

	A comparison of two different approaches to instruction
	A comparison of new and existing programs
	A comparison of different amounts of a single approach
	All of these

In which experimental design does a group receive no treatment?

	Pretest-posttest comparison group
	True experimental posttest only comparison group design
	Quasi-experimental pretest-posttest experimental control group design
	None of these

Which of the following is likely if a nonequivalent group design is used?

	The outcome will favor the better group unless the researcher controls for initial differences.
	ANCOVA will be used to analyze the data.
	Differential selection will be a major internal validity threat.
	All of these

Researchers often conduct experiments over a short time to ensure adequate control of the situation. Often this creates a problem with

	the statistical analysis of data.
	similar treatments.
	differential selection.
	insufficient exposure to treatment.

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