Which of the following statements is false?

	a)	Non-equivalent control group (NECG) design is a quasi-experimental design and uses a pre-test / post-test formulation.
	b)	NECG requires that all participants both in the control and experimental group are of the same ability.
	c)	There may be a problem of selection bias with NECG.
	d)	NECG offers a more realistic interpretation of results by assessing participants' abilities prior to the intervention or experimental manipulation.
Correct! For more information on this topic see p.93, 5.4. Sorry that answer is incorrect, please try again. See p.93, 5.4 for more information on this topic.Your answer has been saved.

Pre-experiments are designed to explore the possible effects of the experimental procedure prior to conducting a more rigorous investigation. In the author's example, what is the main drawback of the pre-experiment example in this chapter?

	a)	Testing effects.
	b)	Maturation effects.
	c)	Sample selection.
	d)	All of the above
Correct! All question the internal validity (in the case of sample selection, the external validity) of the experiment. Sorry that answer is incorrect, please try again.Your answer has been saved.

One problem that may arise when using NECG designs is a selection-maturation interaction. What does this refer to?

	a)	Participants' scores at the pre-test are lower than at the post-test.
	b)	Participants' scores on the post-test are lower than at the pre-test.
	c)	There is no difference in scores between the pre- and post-test.
	d)	Any difference shown in participants' scores between pre-and post-test is due to differential abilities rather than any intervention.
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Which of the following statements is true?

	a)	Statistical regression towards the mean occurs when a number of the test measures used in an experiment contain errors.
	b)	Statistical regression towards the mean is reflected in very high scores at pre-test and very low scores at post-test.
	c)	Statistical regression towards the mean is reflected in very low scores at pre-test and very high scores at post-test.
	d)	All of the above.
Correct! For more information on this topic see p.95. Sorry that answer is incorrect, please try again. See p.95 for more information on this topic.Your answer has been saved.

Time series design involves one sample of participants and taking numerous measurements of the dependent variable. What is the main advantage of such a design?

	a)	It is less likely that historical events will influence participants' performance over time.
	b)	For this type of design, fewer data collection/observation points are required.
	c)	Repeated exposure to the testing materials allows participants to become familiar with them and improve their performance.
	d)	With repeated testing, the recording of data becomes more efficient with definite improvements in accuracy.
Correct! For more information on this topic see p.96, 5.5.Sorry that answer is incorrect, please try again. See p.96, 5.5 for more information on this topic.Your answer has been saved.

What is the main disadvantage of time series design?

	a)	Maturation effects.
	b)	Instrumentation effects.
	c)	Participant mortality.
	d)	All of the above.
Correct! For more information on this topic see p.97. Sorry that answer is incorrect, please try again. See p.97 for more information on this topic.Your answer has been saved.

Which of the following statements is false?

	a)	Time series with non-equivalent control group (TSNECG) addresses all the problems associated with both time series and NECG designs.
	b)	TSNECG involves an extended series of data collection points used with both the experimental and control group.
	c)	The main advantage of TSNECG is that it shows the effect of an intervention and the point at which the effect takes place.
	d)	All of the above.
Correct! For more information on this topic see p.99. Sorry that answer is incorrect, please try again. See p.99 for more information on this topic.Your answer has been saved.