TYPES OF RELIABILITY Flashcards
define reliability
the extent to which a test of measurement produces consistent results
reliability refers to…
consistency where you repeat with the same method, design and measures and get the same results
what are the two types of reliability?
internal reliability
external reliability
what is internal reliability?
extent of consistency in itself
give an example of internal reliability
difference between 50 and 100g is the same as 150 to 200g
give an example of internal reliability in psychology
personality questionnaire e.g. loc
difference between int and ext internal loc is same as int and ext external loc
what is external reliablity?
extent to which a test measures consistently over time
what is an example of external reliability?
lab study being replicated after a year
reliability is measured using a…
correlational analysis that should have a correlation coefficient that should exceed .80 for reliability
how can we improve reliability?
questionnaires use test-retest method and if reliable then coefficient should be +.80
if questionnaire has low reliability you could…
reword the questions or use more open/closed questions
how can you improve reliability in interviews?
using same interviewer
behaviour controlled when asking closed questions
how can we improve reliability in observations?
make sure behavioural categories are operationalised
we need to make sure that behavioural categories are…
observable and measurable
don’t overlap and all behaviours are provided or else it leaves observations up to interp
how can we improve reliability for experiments?
procedures must be the same and be able to be easily repeated, standardised procedures
