Lecture 13 - Experimental and Quasi-Experimental Designs Flashcards Preview

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Flashcards in Lecture 13 - Experimental and Quasi-Experimental Designs Deck (5)
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1
Q

What is a ‘true’ experiment

A

experiments with random allocation of participants to treatment conditions

2
Q

why do we randomly allocate participants to conditions?

A

it spreads any confounding variables EVENLY across conditions, rather than there being a SYSTEMATIC difference other than the treatment

so it helps us to isolate the effect of the treatment variable

3
Q

what does O and X mean when describing an experiment?

A

O means observation/test
X means a treatment

so OXO is obvservation/test, treatment, then a second observation/test

4
Q

What are three systematic approaches to controlling for nuiscance variables?

A

Blocking - experiment arranged in blocks with the known nuiscance variable held constant, e.g. experimenter

Matching

Counterbalancing (eg AB BA)

5
Q

What is a ‘latin square’

A
A way to work out counterbalancing conditions
e.g.
ABC
BCA
CBA