Lab & Field Experiments

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What kind of setting is a lab experiment taken place in?
Controlled
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Advantages of Lab experiments.
High internal validity; extraneous variables minimised; specialist equipment can be used due to lab facilities; easily replicated.
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Disadvantages of Lab experiments.
Artificial situation means lack of mundane realism; demand characteristics are likely; lacks internal validity due to investigator/participant effects.
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What kind of setting is a field experiment taken place in?
Real-life setting
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Advantages of Field experiments.
Less artificial; higher mundane realism; higher internal & external validity; greater generalisation; avoids pp effects.
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Disadvantages of Field experiments.
EVS less easy to control (reduces internal validity); pps may be unaware (ethical issues); no real control of pp samples (population validity reduced).
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What happens in a natural experiment?
Researcher does not manipulate the IV at all (it is naturally occurring).
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Advantages of natural experiments.
Allows research where IV cant be manipulated for ethical/practical reasons; real problems are studied; increased mundane realism + validity; no demand characteristics.
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Disadvantages of natural experiments.
Cannot demonstrate causal relationships; many EVS affecting validity; only be used in natural conditions; pps may be aware.
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What is the common thing between field & lab experiments?
IVS/DVS/EVS are treated the same - the IV is manipulated to see the effect on the DV.
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What does operationalising the variables allow?
Other researchers to replicate the research, as it shows how each variable is measured clearly and precisely.
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What is a directional hypothesis also referred to as?
One tailed
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What is a nondirectional hypothesis also referred to as?
Two tailed
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Card 2

Front

Advantages of Lab experiments.

Back

High internal validity; extraneous variables minimised; specialist equipment can be used due to lab facilities; easily replicated.

Card 3

Front

Disadvantages of Lab experiments.

Back

Preview of the front of card 3

Card 4

Front

What kind of setting is a field experiment taken place in?

Back

Preview of the front of card 4

Card 5

Front

Advantages of Field experiments.

Back

Preview of the front of card 5
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