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RESEARCH METHODS KEY INFO
Mann Whitney U

Difference
Independent groups
At least ordinal data

Wilcoxon

Difference
Repeated measures
At least ordinal data

Chi- squared

Difference
Independent groups
Nominal data

Sign Test

Difference
Repeated measures
Nominal data

Spearman's Rank

Correlation
At least ordinal data

P=<0.05 means: the significance level whereby the…

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Not a science:

No law/ principles
Parsimony
Shared paradigm
Empirical control


Scientific process:

1. Hypothetical statement to be tested based on the aims of the experiment
2. Appropriate methods are chosen allowing us to conduct a valid test on the hypothesis
3. If results don't support the hypothesis the process…

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internet where everyone really has a chance to offer their opinions and police the quality of
research.

How to design investigations (include)

Aim, experimental hypothesis, null hypothesis
Method and Design (advantages and disadvantages)
Variables ­ including extraneous ­ how to control these
Materials and data (stats test)
Ethical issues
Procedure…

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Participants aren't
randomly allocated=
reduce validity

Correlational Useful for things Causality cannot be
difficult to study e.g determined
purposely creating May lack
aggression= unethical internal/external
this allows it to use validity
naturally occurring
variables
Can use real-world
measure can see
effects of real-life
aggression
Longitudinal Can observe patterns Small sample…

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groups which represent the
different conditions]
Matched Pairs [pairs of Individual differences are taken More participants are needed
participants are closely into account
matched and are then No order effects will occur
randomly allocated to one
of the experimental
conditions]




Sample Definition Strengths Weaknesses
Volunteer Where the sample This is…

Comments

Laurriette

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Excellent resource, explains everything nicely :)

komal maqsood

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Amazing piece of work, although some bits are missing. Very well put into short form.

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