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Types of experiment - Coggle Diagram
Types of experiment
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Experiments
Experiments use quantitative data. They look at a measurable change in the DV which has been caused by different levels of the IV. All experiments have an IV and DV.
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Natural Experiment
An experiment conducted in a natural laboratory setting. Experimenter does not manipulate the IV. it would have changed anyway.
Few opportunities for this kind of research, because sometimes relies on natural events that occur infrequently eg children who have no TV at home vesus thosr who do). This reduces usefulness of the method
The may be EVs that could affect the results. For example unique characteristics of the participants cannot be control because they cannot be randomly allocated to groups
DV is often tested in a lab. Therefore, EV's can be well controlled because standardised procedures can be followed.
Usually high validity, because variables are naturally and relate to everyday life. However the this is not always the case, eg when IV is male versus female behaviour tested in controlled conditions (lab)
Field Experiment
An experiment conducted in a natural setting, experimenter manipulates the IV.
Strength some control over EV's is it possible to use standardised procedures this means cause and effect conclusions are more valid.
Researcher may lose control of some EVs because of real-life setting. This makes it more difficult to show cause and effect.
Strength Often more realistic than laboratory experiments because participants not aware they are being studied enhances validity of results.
There may be ethical issues People may not know they are involved in an experiment. This means they cannot give their informed consent.