Experimental Methods (Types Of Experiments)

Question 1

What is a LAB experiment?

Answer 1

LAB:

• ✅️ controlled environment

• ✅️ manipulates IV records effect on DV

• Strict control over EX variables

E.g. Milgrams study

Question 2

What is a FEILD experiment?

Answer 2

FEILD:

• ❌️ Natural setting

• ✅️ manipulates IV, records effect on DV

E.g. Pilavin and Pilavin experiment

Question 3

What is a NATURAL experiment?

Answer 3

NATURAL:

•❌️ environment not controlled

•❌️ IV not manipulated

E.g. smoking banned from public places, 2007

Question 4

What is a QUASI experiment?

Answer 4

QUASI:

• ✅️ controlled environment

• ❌️ IV not determined- variables just exist (e.g. age)

E.g. Baron - Cohen et al 1986: test sequencing abilities with disabled

Question 5

Do the types of experiment have internal validity?

Answer 5

LAB: ✅️ as high control over EX variables

FEILD: ❌️ natural setting= EX variables hard to see

NATURAL: ❌️ low control levels so many EX variables

QUASI: ✅️ as in lab so control over EX variables.

Question 6

Do the experiment types have external validity?

Answer 6

LAB: ❌️ environ artficial

FEILD:✅️ setting natural

NARURAL: ✅️ environ authentic yet
Hard to generalise to wider pop

QUASI: ❌️artificial environ

Question 7

What are the ethical issues for types of experiments?

Answer 7

LAB: ❌️none PPTS aware- consent + debreif

NATURAL: ❌️NONE events happen daily

FEILD: ✅️PPTS unaware, cannot give consent = less privacy

QUASI :❌️NONE aware theyre taking part (but not what exactly is involved)

Question 8

Are the experiment types replicable?

Answer 8

LAB: ✅️ high control =accuracy

FEILD: ❌️ less control so hard to replicate

NATURAL: ❌️ one off occasion- hard to replicate

QUASI: ✅️ high control =accuracy

Question 9

Do the experiment types have demand characteristic?

Answer 9

LAB: ✅️ may guess test= guess aim- invalid

FEILD: ❌️ unaware of test = not guess aim= more valid

NATURAL: ❌️ PPTS respond to uncontrolled.

QUASI: ✅️ aware so may guess aim= less valid