in pairs, think of how we use the words reliability and validity in everyday life. what do these...
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In pairs, think of how we use the words reliability and validity in everyday life.
What do these words mean? Is there a difference between them or do they mean the same thing?
When assessing the reliability of a study, we generally need to ask two questions1. Can the study be replicated?2. If so, will the results be consistent?
High vs low reliability
Match the method of estimating reliability to the description (pg165)
Test-Retest
reliability
If the measure depends upon interpretation of behaviour, we can compare the results from two or more raters.
If the results in the two halves are similar, we can assume the test is reliable
Split Half
Reliability
Splitting a test into two halves, and comparing the scores in both halves
If the results on the two tests are similar, we can assume the test is reliable
Inter-Rater
reliability
The measure is administered to the same group of people twice
If there is high agreement between the raters, the measure is reliable
ControlDid the IV cause the DV?
Realism Does the experiment reflect real life?Mundane realism
GeneralisabilityCan we generalise our results to the
general population?
Realism vs Control
Internal validityWhat happens inside the study.
External ValidityHow our results can be generalised beyond
the study Validity of psychological measures
How well our methods of measurement actually measure what we intend
Mundane realism Extraneous variables
Situational variablesParticipant variables Investigator effectsDemand characteristicsParticipant effects
Task A and BName the variablesWhat are the EVs and how could they have
been controlled?
Read pg 165-166 and fill in the gaps
Operationalisation of variablesCan result in loss of validity
Content validityDoes the method used actually seem to
measure what you intended? Concurrent validity
How well does the measure agree with existing measures?
Construct validity Is the method actually measuring all parts
of what we are aiming to test? Predictive validity
Is our measure associated with future behaviour?
Complete tacks C, D and E.
Types of Validity
Experimental ValidityValidity of psychological
measures
Internal Validity
External Validity
Extraneous variables
Situational Variables
Participant Variables
Investigator effects
Demand characteristics
Participant effects
Ecological validity
Population validity
Content Validity
Concurrent validity
Mundane realism
Construct validity
Predictive validity
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