Experiment Types
- Created by: alexandtheturners
- Created on: 24-08-20 11:08
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- Experiment Types
- Lab Experiments - experiments carried out in a lab setting or a well - controlled environment
- can be replicated to ensure validity
- likely to guess the aims, thus acting to please or displease the researcher
- lacks ecological validity, as the participants may change their behaviour
- eg - a memory test in a lab
- EVs can be controlled, so can 100% say that the IV is responsible for the change
- Field Experiments - experiments carried out in a natural environment
- high ecological validity as behaviour is natural
- may not know that they are in the study so won't guess the aims
- it is unethical if they do not know that they are in the study
- eg on the streets or at their home
- harder to establish cause and effect due to a lack of control of the EVs
- Lab Experiments - experiments carried out in a lab setting or a well - controlled environment
- Quasi Experiments - experiments based on existing differences between participants (a quality they possess)
- comparisons can be made
- eg - the difference between genders
- no random allocation or control of conditions, so there is no manipulation of the IV
- high control, as they are often carried out in a lab, thus increased confidence in results
- Experiment Types
- Lab Experiments - experiments carried out in a lab setting or a well - controlled environment
- can be replicated to ensure validity
- likely to guess the aims, thus acting to please or displease the researcher
- lacks ecological validity, as the participants may change their behaviour
- eg - a memory test in a lab
- EVs can be controlled, so can 100% say that the IV is responsible for the change
- Field Experiments - experiments carried out in a natural environment
- high ecological validity as behaviour is natural
- may not know that they are in the study so won't guess the aims
- it is unethical if they do not know that they are in the study
- eg on the streets or at their home
- harder to establish cause and effect due to a lack of control of the EVs
- Lab Experiments - experiments carried out in a lab setting or a well - controlled environment
- can't say for sure it is the IV effecting the DV
- Natural Experiments - experiments that take advantage of pre-existing IVs that would have still happened, had the researcher not been interested
- no random allocation, so the EVs can't be controlled
- may be the only ethical option for situations that can't be created
- greater external validity for real life situations
- generalisation is limited, as some are one-off events
- eg - orphans or a natural disaster
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