Task 3 Making Observations and asking questions Flashcards
Reliability
Reliability of a measure concern its ability to produce similar results when repeated measurements are made under identical conditions
Validity
Validity of a measure id the extent to which it measures what you intend it to measure
Face validity
descries how well a measurement instrument appears to measure what it was designed to measure
Content validity
has to do with how adequately the content of a questionnaire sample the knowledge, skills, behaviour that the set is intended to measure (covering the knowledge which you have done the questionnaire for)
criterion-related validity
reflects how adequate a test score can be use to infer an individuals value on some criterion measure (how well does the score predicts future outcomes of a test about the same topic)
concurrent validity
if the scores and the criterion are collected at the same time
predictive validity
comparing the scores of your test with the value of criterion measure observed at an later time
Construct validity
Validity of a test judged by how adequate a test samples behaviour representative for the universe of behaviours the test was designed to sample
Test-retest reliability
test two times with a long time in between
→when correlations are high your measure is reliable
Parallel-forms reliability
same as test-retest but the second time you will get a parallel form which fights the problem of recalling
Split-half reliability
parallel test in the same session
Interrater reliability
A level in which multiple observers agree in classification and quantification of behaviour
preliminary observations
observe your objects in the certain situation before the real study and list all their behaviour
literature search
means to look at previous experiments in your field and try to copy the behavioural categories you should do preliminary observations as well to be sure that they fit
Quantifying behaviour
- Frequency method
→You record the number of times a behaviour occurs in a certain time - Duration Method
→how long does a particular behaviour last - Intervals method
→create time intervals and look if the behaviour occurs within the interval (make them so short that only one behaviour can occur per interval)
Time sampling
scan the group for a certain time an than record the observed behaviours for the same time (making more detailed records of your observation)
Individual sampling
You choose a single subject and observe it for a period and record the observations than you choose another subject and repeat the procedure (when you want to preserve the organization of an individual’s behaviour)
Event sampling
You observe only one behaviour (e.g. sharing behaviour) and record all instances of that behaviour (when you clearly define one behaviour of interest)
Naturalistic observations
observing your objects in their natural environment without manipulating variables
Unobtrusive observations
observations that do not alter the natural behaviours of your subjects (stay hidden or let the objects get used to you)
Ethnography
a researcher becomes immersed in the behavioural or social system being studied
→gaining access to a field setting
→gaining entry into the group
→becoming and staying invisible
Making observations and recording data
Easy if you are not covert but when you are take short notes