experiments Flashcards
1
Q
experiment?
A
researcher deliberately manipulates the IV to see the effect on the DV. Experiments allows the researcher to draw casual conclusions. An experiment normally takes place in a controlled environment but sometimes takes place in real environments.
2
Q
strengths of experiments?
A
- cause researcher manipulates IV under controlled conditions you can assume cause and effect.
- can control extraneous variables more easily and therefore results in greater internal validity.
- takes place in a real life setting so participants are likely to behave normally increasing the ecological validity
3
Q
disadvantages of experiments?
A
- takes place in a controlled environment which can be artificial therefore participants may behave unaturally resulting in low ecological validity.
- more ethical issues than other methods
- in real life setting its difficult to control confounding variables therefore lower internal validity than in lab
4
Q
quasi experiment?
A
not a true experiment as IV does not manipulate the DV however IV may change naturally. you use quasi experiment when its unethical or impractical to manipulate the IV.
5
Q
2 types of quasi experiments?
A
- natural experiment
- when its not possible or practical to manipulate IV (how stress effects people) - difference studies
- where the IV is not something that varies at all, it is a condition that exists. (differences in age on performance)
6
Q
advantages for quasi ?
A
- allows research where it would be unethical or not practice to manipulate IV
- enables researchers to study real problems such as stress on health
- more likely to be realistic and therefore ecologically valid
7
Q
disadvantage for quasi?
A
- because you’re not directly changing IV you can’t assume cause and effect because there may be other variables present that may cause DV to change.
example = studying the effect of stress on heart disease, may be unhealthy lifestyles that cause heart problems rather than stress
