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Summary of research methods part 2

Investigation design- aims and hypotheses

Hypothesis- a clear and precise statement of the expected effect of the
operationalised IV upon the operationalised DV
Aim- a general statement about what the researchers intend to find out in
an experiment e.g. the aim of this study…

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Problems Rise in individual Participants may It's very difficult
differences as be subject to to accurately
more participants order effects match people into
take part in the (practice or pairs in reality;
experiment. fatigue) therefore some important
Results therefore results in the characteristics
be due to variation second condition may…

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Inter rater reliability Two people are A correlation analysis of
consistent in the recording can be
observations calculated
Internal reliability The extent to which a Use the split half
questionnaire technique and check to
consistently measure the see if the scores from
same features both halves are similar
Investigation design-…

Page 4

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in the sample
they can decide
not to
therefore the
sample will be
biased

Opportunit Mostly used by Easiest to do It tends to be biased
y psychology students. allowing larger due to the small
Consists of taking the possibly more groups so therefore it
sample from the representative lacks…

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