Experimental Methods

Question 1

What are the 4 types of experiments

Answer 1

Lab, field, natural, quasi

Question 2

What is a lab experiment

Answer 2

Controlle

Question 3

What are the 4 types of experiments

Answer 3

Lab
Field
Natural
Quasi

Question 4

What is a lab experiment

Answer 4

Controlled environment
IV is manipulated and DV is measured

Question 5

+ and - of lab experiments

Answer 5

+ high internal validity as externaous variables are controlled
+ replication is easier due to standardised procedures

• low ecological validity as artificial settings don’t reflect real life
• demand characteristics as pups may guess aim and later behaviour so not reliable

Question 6

What is a field experiment

Answer 6

Natural environment where IV manipulated and DV measured

Question 7

+ and - of field experiments

Answer 7

+ high ecological validity as the behaviour is more natural
+ reduced demand characteristics as its harder for pups to guess aim

• less control over externaous variables which reduces internal validity

Question 8

What is a natural experiment

Answer 8

IV occurs naturally and is not manipulated, DV is measured
In natural environment

Question 9

+ and - of natural environments

Answer 9

+ allows study of variables that cannot be ethically manipulated e.g trauma
+ high ecological validity if conducted in real life settings

• no control over IV leading to low internal validity

Question 10

What is a quasi experiment

Answer 10

IV is based on pre existing differences and is not manipulated

Question 11

+ and - of quasi experiments

Answer 11

+ can compare naturally occurring groups
+ useful when random allocation is not possible

• no manipulation of IV so cannot establish casualty confidently