Validity and Reliability

What is validity

True and accurate

What is internal validity?

Does the test measure what we intend it to measure.

What is external validity?

Can we generalise our findings to other situations/ populations/other points in history

What factors can affect internal validity?

Extraneous variables which include: investigator affect, demand characteristics, social desirable bias,order effect

What is the investigator affect?

When the investigator hints to something when asking a question which changes what the answer would normally be affecting the results.

What is Social desireable bias?

People change there behaviour to make themselves look better

What are demand characteristics

What settings do you generalise too?

Ecological validity, population, historical