External validity

Question 1

What is validity?

Answer 1

When a study measures what it claims to measure

Question 2

What is external validity

Answer 2

A study has external validity when the results of the study generalise to other situations & people

Question 3

What is internal validity

Answer 3

A study has internal validity when the study measures what it claims to measure and there are no extraneous variables

Question 4

What are the 3 types of external validity?

Answer 4

• Ecological validity
• Temporal validity
• Population validity

Question 5

What is ecological validity

Type of External validity

Answer 5

When results of a study generalise to how people behave in real life
e.g of study that lacks ecological validity:
Phil investigates childrens play behaviour by obderving how children play in unfamiliar laboratory with unfamiliar toys.

Question 6

What is temporal validity

Type of external validity

Answer 6

A study has temporal validity when the results generalise across time

e.g of a study lacking temporal validity:
A study investigated peoples music taste in early 1800s,which showed a resounding music preference for mozart-lacks temporal validity because music taste has changed in past 100 years

Question 7

What is population validity

Answer 7

When results of study generalise to whole population