Research Methods Flashcards
What’s a laboratory experiment?
An experiment carried out in a controlled environment where the variables can be manipulated
What are two advantages of lab experiments?
High internal validity( controlled variables)
easy to replicate
what are two disadvantages of lab experiments?
low ecological validity (can’t be generalised)
demand characteristics
whats a field experiment?
experiment conducted in an environment that suits what you’re measuring (IV still manipulated)
give two advantages of field experiments
high ecological validity (can be generalised)
lack of demand characteristics
give two disadvantages of field experiments
low internal validity (less control of confounding or extrenuous variables)
harder to replicate
what’s a natural experiment?
conducted when it’s not legal or moral to conduct an experiment
give two advantages of natural experiments
allows research in unethical areas
high ecological validity
give two disadvantages of natural experiments
lack of casual relationship (IV not directly manipulated)
lack of random allocation
what’s a quasi experiment ?
an experiment where variables or IV can’t be manipulated by anyone - they already have it eg. gender or ethnicity
give two advantages of a quasi experiment
allows comparison between people
can be carried out in a lab
give two disadvantages of a quasi experiment
if tested in a lab, low ecological validity
lack of random allocation
what’s an extrenuous variable ?
any variable that may affect the DV - control variables
whats a confounding variable?
variables that can’t be or aren’t controlled in an experiment
what is external validity and the 3 types?
the degree to which research can be generalised
- ecological (in terms of where it was researched) - population (people tested eg. diversity) - historical (still valid today?)