Research Methods: Assessing & Improving The Validity Of Experiments - TW Flashcards
What does validity mean?
How accurate a study’s results are
What are 2 types of validity?
Internal + external
What are 3 types of external validity?
Population validity
Ecological validity
Temporal validity
Population validity means…
The extent to which results can be accurately generalised to different populations of people
Ecological validity means….
The extent to which the results can be accurately generalised to different settings
Temporal validity means…
The extent to which results can be accurately generalised to other time periods
What are 2 ways of assessing internal validity
Face + Concurrent
What does internal validity mean?
Whether the researcher is measuring what they intend to
“Whether the researcher is measuring what they intend to measure” refers to which definition of validity?
Internal validity
What does external validity refer to?
The extent to which the results of the study can be generalised to different settings and or people
“The extent to which the results of the study can be generalised to different settings and or people” refers to which type of validity?
External validity
When testing for concurrent validity, what do you compare the results of your research / questionnaire / behavioural categories to?
Similar research which has been preestablished for validity
A correlation coefficient of -0.6 suggests a ….
Strong, negative correlation
When assessing concurrent validity, what correlation coefficient shows high validity?
+0.8
What 2 features does a psychologist need to have to assess face validity?
Be independent from the research, and work in a similar field
Demand characteristics will affect what type of validity?
Internal validity
What must the independent psychologist, working in a similar field say when assessing face validity?
Yes
“The extent to which findings remain accurate over time” refers to which type of external validity?
Temporal
A natural experiment has high internal validity - true or false?
False
A field experiment has high internal validity - true or false?
False
Which experimental methods can have high internal validity?
Lab (+ quasi)
The choice of sampling technique can affect internal validity - true or false. Why?
True - the sample could be biased
What methodological issue will standardised procedures / instructions solve?
Investigator effects
Investigator effects can be solved by…
Standardised procedures / instructions
Using a control group will increase what type of validity?
Internal
When assessing concurrent validity, you must compare your results to the results of a test…
That has been PRE ESTABLISHED for it’s validity
When asked to IMPROVE the validity of a study, which TYPE of validity must you deal with?
Internal
Why, when assessing face validity, must the researcher be independent?
To avoid bias
What is a correlation?
A relationship between two variables
A correlation coefficient is measured on a scale of…
-1 to +1
