Assessing Reliability Flashcards
what does reliability mean?
reliability is the extent which results can be repeated overtime.
if something is reliable, there must also be …. CORRELATION.
HIGH
the s…. of a correlation will be measured using the p…… or spearman coefficient.
STRENGTH / PEARSON
what is high correlation coefficient? (the number)
+0.8 of higher
a high correlation indicates what?
indicates that a test is reliable
a low correlation coefficient indicates what?
poor reliability
what are the two ways of assessing reliability for of questionnaires?
split half method and test-retest method
what is the split-half method?
Measures internal reliability. Split test into 2 and get the PPTs to do both halves. They should produce similar results. Used with questionnaires. Any areas where there is a low correlation should be removed from the questionnaires
what is the test-retest method ?
Measures external reliability. Give the same test to the PPTs on 2 different occasions. Should get a similar result/ strong correlation.
what is validity?
the extent to which we are measuring what we intend to measure
way(s) of observing reliability of observations.
Inter-rater/observer reliability
what is inter-rater/ observer reliability?
Using more than one researcher/observer to conduct the study, compare results.
Conduct a correlation of all researcher/observer scores. High correlation (+0.8 or more)=consistent research results.
