1. get a linetrol
2. External validity
3. Goals
4. memorisesequences
Difficulties with true look intos in cancel settings
1. Obtaining permission (is research credible?)
2. Using random subsidization (ethical issues)
3.Contamination
Resentment by regard group
Competition between groups
scattering of treatments
4. Threats to external validity
How representative is the sample?
5.Experimenter expectancy issuances:
e.g., Hawthorne effect: behavior change because subject is aware that someone is fire in them.
Natural experiments are conducted in the everyday (i.e. cancel) environment of the participants but here the experimenter has no control over the IV as it occurs naturally in real life, e.g. Hodges and Tizards research (1989) which compared the colossal term development of children who have been adopted, fostered or returned to their mothers with a control group of children who had spent all their lives in their biological families.
& dump; master: Behavior in a natural experiment is more likely to reflect life real because of it natural setting, i.e. very high ecological validity.
• Pro: in that location is less likelihood of demand characteristics affecting the results, as participants may not know they are being studied.
• Pro: Can be used in situations in which it would be ethically unacceptable to manipulate the independent variable.
o Con: There is less control over extraneous variables that tycoon bias the results. This in turn makes the experiment harder to replicate.
o Con: They may be more expensive and time consuming than lab experiments.
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