*Research Methods- Year 2 Flashcards
Reliability
How consistent a measuring device is, including psychological tests or observations which assess behaviour
What are the different ways to assess reliability
-test-retest reliability
-inter observer reliability
-Inter-rater reliability
-Inter-interviewer reliability
Test-retest reliability
participants take the same test on different occasions- a high correlation between test scores indicates the test has good external validity
Inter-observer reliability
Is used in observations. the extent to which there is an agreement between 2 or more observers involved in observing behaviour
-must report their observations independently and come together at the end
Inter-rater reliability
Measured during content analysis
Inter-interviewer reliability
Measured during interviews if these are conducted by different people
How to improve reliability in questionnaires
-replace open questions with closed, fixed choice questions which may be less ambiguous
How to improve reliability in interview
-use the same interviewer
-properly trained so an interview doesn’t ask leading questions
-structured interview
How to improve reliability in observations
-operationalised behavioural categories
-categories should not overlap
-all possible behaviour should be covered
How to improve reliability in experiment
-standardised procedure
Validity
The extent to which an observed effect is genuine- does it measure what it’s supposed to measure and can it be generalised beyond the research setting
Internal validity
How much the findings of a method are due to the manipulation of a variable rather than another measure
External validity
The findings can be generalised beyond the context of the research situation
What are the types of external validity
-Ecological
-Temporal
-Population
Ecological validity
The extent to which findings from a research study can be generalised to other settings
Temporal validity
The extent to which findings from a research study can be generalised to other historical times and eras
Population validity
The extent to which findings from a research study can be generalised to other cultures/people outside the research
What are the ways of assessing validity
-Face validity
-concurrent validity
Face validity
A basic form of validity in which a measure is scrutinised to determine whether it appears to measure what it’s supposed to measure
Concurrent validity
The extent to which a psychological measure relates to an existing similar measure
E.g undertaking two different IQ tests
How to improve validity in experiments
-use a control group
-standardise procedure
-use blind procedure
How to improve validity in questionnaires
-utilise a lie scale
-promote anonymity
How to improve validity in observations
-covert observations
-use behavioural categories
How to improve qualitative research
-use qualitative or quantitative
-use triangulation
What does a correlation co-efficient show
The strength and direction of two or more co-variables