4. Types of Experiment (AS) Flashcards
What is a lab experiment?
And experiment that takes place in a controlled environment within which the researcher manipulates the idea of a cause-and-effect on the TV was maintaining strict control of extraneous variable is.
What are the strengths of alarm experiment?
They have high control of extraneous variables.
We can be more certain about demonstrating cause and effect - hi internal validity.
Replication is more possible because of the high levels of control.
What are the weaknesses of a lab experiment?
They may lack generalisability.
The unusual setting for behaviour cannot always be generalised beyond the research settings – low external validity.
The environment may give rise to demand characteristics.
The task carried out in a lab may not represent real life experiences – low mundane realism.
What is a field experiment?
An experiment that takes place in a natural setting within which the researcher manipulates the IV and records the effect on the DV.
What are the strengths of a field experiment?
They have high mundane realism compare to a lab experiment. Leave a line they may produce behaviour which is more valid and authentic.
Participants may be unaware they are being studied – high internal validity.
What are the weaknesses of a few experiment?
There is less control of extraneous variable is so it’s harder to establish cause and effect between the IV and DV.
Precise replication is often not possible.
There are ethical issues as if participants are unaware they are being studied they cannot consent to be studied and there may be an invasion of privacy.
What is a natural experiment?
Experiment where the change in the IV is not brought about by the researcher but would’ve happened even if the researcher had not been there. The researcher records the effect on the DV.
What are the strengths of a natural experiment?
They provide opportunities for research that me know otherwise be undertaken for practical ethical reasons.
They often have high external validity because they involve the study of real life issues and problems.
What are the weaknesses of natural experiments?
They may only occur very rarely reducing the opportunity for research.
It may be difficult to generalise to other situations.
Participants may not be randomly allocated to experimental groups this means the researcher may be less sure whether the IV has effected the DV.
What are quasi experiments?
A study that is almost experiment Polansky ingredients. The IV has not been determined by anyone, the variable simply exist. Strictly speaking this is not an experiment.
What are the strengths & weaknesses of a quasi experiment?
They are often carried out under controlled conditions so have the same strength as lab studies.
Like natural experiments you cannot randomly allocated participants to conditions so there maybe confounding variables.
