research methods Flashcards
What is a laboratory experiment?
An experiment set in a lab where the researcher has a high level of control of all the variables, in a control environment using standardised procedures. The IV is manipulates and the DV is measured.
Pros of a laboratory experiment
researches can be confident in establishing a cause and effect relationship
high internal validity (DV is due to change in IV)
Easily replicated due to standarised procedures.
Cons of Laboratory experiment
Lacks ecological validity a type of external validity
lab studies cannot be applied to the real world and tasks conducted in the lab dont reflect real life situations lacks mundane realism
demand characteristics.
What is a field experiment?
Conducting an experiment in naturalistic settings
Pros of field experiments
- high ecological validity
- likely to have mundane realism
- no demand characteristics
Cons of field experiments
- possible extraneous variables that could be influencing the DV
- cannot randomly assign participants to conditions to separate condition the change in DV may be due to participant variables reducing internal validity
What are natural experiments?
The IV would have occurred naturally without the researchers manipulation
Pros of natural experiments:
allow research in areas that could not happen in a controlled experimentation due to ethical or cost reasons
high external validity
free from demand characteristics.
Cons of natural experiments:
The events have already occurred regardless of the researcher hey have no influence therefore extraneous variables cannot be control
researches cannot claim they have a cause and effect relationship
The events are often rare and cant be replicated to test for their reliability.
What are Quasi experiments
Participants cannot be randomly assigned because the Iv is an innate characteristic of the participants
Pros of Quasi experiments
they are the only way to ecperimentally study factors that are prexisting characteristics of participants
Cons of Quasi experiments
There may be other factors related to the level of IV that cannot be controlled (confounding variables)
Informed consent
participants should be aware of the aims, purpose and consequences of taking part of the research and provide their informed consent before the study.
Right to withdraw
before taking part in the research participants should be told they have the ability to end heir participation in the study at any stage (destroying any personal data collected on them)
Protection from harm
researcher is responsible for designing research that doesn’t risk the psychological well being, physical health, personal values and dignity of the participants.