Experiments
- Created by: chabs
- Created on: 18-03-14 12:32
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- Experiments
- Types
- Lab
- + High controls allows for a cause and effect to be determined.
- - Artificial conditions may lower the ecological validity of the research -Ppts are aware they are being studied therefore may show signs of demand characteristics
- Feild
- + Greater ecological validity + Less likely to display demand charcteristics
- - No controls making it difficult to replicate
- Qausi
- + Greater ecological validity + Conditions may not be manipulated by the researcher
- - No control making cause and effect difficult to establish - Difficult to replicate
- Lab
- Hypothesis
- One tailed predicts the direction.
- Two tailed states there will be a difference but does not state a direction.
- Null states there will be no difference.
- Experimental designs
- Independent measures
- -Difference ppts are used in each condition so there is no link between results
- + Different ppts are used so there will e no order effect
- Repeated mesures
- + One set of ppts making the results more valid
- - Results may be affected by demand characteristics or order effect.
- Matched pairs
- + Both groups have the relevant characteristics so results are related
- - Twice as many ppts are needed making the experiment less economical
- Independent measures
- Types
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