Types Of Experiments Flashcards
What are the 4 types of experiments?
Lab
Field
Natural
Quasi
What is a Lab experiment?
The researcher deliberately manipulates the IV in a controlled environment allowing for control over EVs. The effects of the IV on the DV are measured
What is a Field experiment?
In a field experiment, the independent variable is deliberately manipulated in a more natural setting (e.g. the street, in a school, at work) and participants are generally unaware that they are taking part in an experiment. The effects of the IV on the DV are measured.
What is an Natural experiment?
In a natural experiment, the IV is not changed by the researcher. Instead, the IV is naturally occurring and the researcher has no control over it. The researcher records the effect of the naturally occurring IV on the DV.
You can carry out natural experiments in controlled lab settings.
What is a Quasi experiment?
In a quasi experiment, the IV is based on an existing difference between people (e.g. age or gender). The IV is not manipulated, it simply exists.
A quasi experiment can also be carried out in controlled lab settings.
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What does generalise mean?
Generalise – to apply from one situation or group of people to another.
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What is validity?
Validity – the extent to which the findings from the study are accurate/true
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What is internal validity?
Internal validity – the extent to which the findings from the study actually measure what they claim to measure
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What is External Validity?
External validity – the extent to which the findings from the study can be generalised (are valid/accurate/true) outside of the original context in which the study was conducted. Do the results only show us how those specific participants behaved in that setting at that time?
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What is internal reliability?
Internal reliability – was the research consistent within itself, e.g. did all the participants have the same experience?
