experiments Flashcards
validity
how well a test was able to measure what is was meant to
types of experiments 5
true
field
quasi
natural
lab
iv
manipulated
dv
measured
control
kept same to find releationship between iv and dv
lab experiment
done in highly controlled conditions
field experiment
done in a natural setting, less control over variables
true experiment
iv changed, dv measured, participants randomly allocated and randomly chosen
prove or disproof relationship
quasi experiment
no iv are changed, and groups are formed by pre-existing differences
natural experiment
result of naturally occuring event, would be unethical to inflict this event
not having a sample representitive of a population
sampling bias
external validity
the extent to which a study can be generalised
construct
theoretically defined variable, cant be directly observed since they represent behaviour
operationalization
turning abstract constructs to observable ideas
null hypothesis
shows no releationship
