types of experiment Flashcards
(9 cards)
4 types of experiment
Lab
field
natural quasi
lab experiment
controlled environment where CVs and EVs can be controlled
IV is changed DV is recorded
+/- lab experiments
EVs and CVs can be controlled
easily replicated
lacks generalisability
demand characteristics
field experiment
natural setting
IV is manipulated
effect of DV is recorded
+/- field experiments
natural environment - generalisability
no demand characteristics
difficult control over EV/DV
ethical issues
natural experiment
experimenter does not change the IV - changes naturally occurring DV or devised by researcher
+/- natural experiment
practical/ethical
high external validity
pps not randomly allocated
low generalisability - natural event rarely occurs
quasi experiment
IV based on pre-existing differences (age, gender)
DV may be naturally occurring or devised by experimenter
+/- quasi experiment
high control - replication
comparisons can be made
pps not randomly allocated
cannot say change in DV was due to IV
