U2 rm1 research methods

what types of experiments are there

lab, field, quazi, natural

what is a lab experiment

most variables are controlled and standard procedures/ not necessarily in a lab

what are the advantages of lab experiments

 control of EV's = high internal validity and more valid results overall

Replication = other researchers can repeat so findings should be highly reliable

State relationship between IV and DV and cause and effect can be stated easier

what are the disadvantages of lab experimetns

Experimenter bias can be fixed with double blind

Low external validity (will act differently in lab)

Demand characteristics -> participants trying to figure out what does the researcher wants

what is a field experiment

conducted in a natural settting e.g. school and the iv is manipulated by the researcher

what are the advantages of field experiments

Higher ecological validity, findings are more generalisable to real life, situation is similar to real life

what are the disadvantages of field experiments

Low control of extraneous variables (noise, movement) -> change is due to extraneous variable

what is a natural experiment

change in iv occurs naturally

what are the advantages of a natural experiment

Very high external validity because things happened without manipulation

No demand characteristic because real life happens

what are the disadvantages of a natural experiment

No control over Ev's

Not replicable

what is a quasi experiment

the difference within the group e.g. age is the iv

what are the advantages of a quasi experiment

Only way to study gender differences

what are the disadvantages of a quasi experiment

Can't control participant variables