Planning psychological research
- Created by: emilythompsxn
- Created on: 10-04-19 16:44
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- PLANNING PSYCHOLOGICAL RESEARCH
- HYPOTHESES
- NULL HYPOTHESES
- If a prediction suggests there will be no pattern in the results
- No difference made to the DV
- No correlation between DV and IV
- ALTERNATIVE HYPOTHESES
- Alternative to the null so will predict there is some pattern in results
- NULL HYPOTHESES
- VARIABLES
- INDEPENDENT= the conditions, that will be changed
- CO-VARIABLES= only in experiments where differences are predicted
- DEPENDENT= what is measured as it will potentially be affected by iv
- EXTRANEOUS= other factors that can affect the outcome, that are not controlled
- EXPERIMENTAL DESIGNS
- INDEPENDENT MEASURES= only take part in one condition
- + No order effects + Task can remain the same= removes e variables
- - Individual differences - More p's are needed so they can be split this needs more time and money
- INDEPENDENT MEASURES= only take part in one condition
- POPULATION AND SAMPLING
- TARGET POPULATION= the group of people the psychologists are investigating
- SAMPLING
- RANDOM SAMPLE= everyone in their to has an equal chance of being selected
- + Tends to be representative + No bias
- - time consuming - risk of freak sampling
- OPPORTUNITY SAMPLE= selected as they are convenient
- - Not representative - Bias in selection
- + Quick and cheap to do
- RANDOM SAMPLE= everyone in their to has an equal chance of being selected
- HYPOTHESES
- REPEATED MEASURES= participants take place in all conditions
- - Risk of order effects performance may strengthen if practiced - Often tasks need to be changed so the p's don't get bored
- + No p variables so any differences can be blamed on the participants + It is more cost efficient
- EXPERIMENTAL DESIGNS
- INDEPENDENT MEASURES= only take part in one condition
- + No order effects + Task can remain the same= removes e variables
- - Individual differences - More p's are needed so they can be split this needs more time and money
- INDEPENDENT MEASURES= only take part in one condition
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