Personal Investigation Flashcards
Validity issues
- Researcher bias - double blind
- Demand characteristics- single blind participants being unaware of research hypothesis until after their role is complete
- Social desirability
USE INDEPENDENT GROUPS DESIGN
By giving anonymity and confidentiality when they give answers
Assess validity
Face - whether test appears at face value measure what it claims to purpose is clear
Concurrent - validating a measure by comparing with established measurement that has known validity if similar high val if low redesign
construct - whether overall results reflect phenomena as a whole
Content - checks whether method of measuring behaviour is accurate and decides if it’s fair test
Predictive - degree to it forecasts future outcome do findings apply to different settings
Reliability issues
Operationalisation of variables - If you don’t clearly state how you are defining and measuring variables makes replication harder and more likely inter rater reliability issues
Order effects in repeated measures when doing second condition practiced or fatigue
Lack of standardised procedures, inconsistency of measuring tools
Uncontrolled environment
Deal with reliability issues
- Uses standardised procedure
- Instructions
- Scientific measuring equipment ( MRI over self reported feelings)
- Lab experiment to overcome reliability issues greater control lower risk of extraneous variables
- Order effects use counterbalancing
Splitting population into 2 halves first half complete one condition afollowdd by second
Conditions affect equally
Asses reliability
Split half testing - splitting ps answers and checking is similar scores yes then high internal reliability if low then redesign
Test retest - testing and retest ps over time with same test comparing scores if same has external reliability
Inter rater - two or more researchers produce consistent regulars by using standardised procedure, agreed coding system
