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Flashcards in Week 10 Lecture Deck (6)
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1

Why is variance necessary in research?

Without variance, there is nothing to test.

2

Why do research designs control unwanted sources of variance?

In order to evaluate the effects of the independent variable.

3

How do we maximise experimental variance?

Make sure that there are real differences between the groups (using a manipulation check).

4

How do we control extraneous variance?

Make sure the groups are as similar as possible at the start of the study.

5

How do we minimise error variance?

Control with careful measurement or with special designs (e.g., correlated-group designs).

6

What is manipulation check?

An specific test of whether the independent variable manipulation actually worked the way it was intended.