Design
- Created by: Georgina
- Created on: 14-04-14 13:50
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- Design
- aims
- purpose of investigations
- hypothesis
- alternative
- directional
- non-directional
- null
- alternative
- experimental designs
- independent groups design- different ppts are used in each conditions
- no order effects
- individual differences
- repeated measures- the same ppts are used in each condition
- fewer ppts needed
- no individual differences
- order effects
- demand characteristics
- Matched pairs design- each group of ppts are carefully matched on all variables considered relavent to experiment
- advantages of both repeated measures and independent group design
- - diffficult to carry-out costly and slow its dependent on the use of pre-testing ppts
- independent groups design- different ppts are used in each conditions
- design of naturalistic observations
- time interval sampling, recording what occurs e.g. every 10 mins
- time point sampling recording what occurs at given points of time e.g. meal time
- event sampling, recording a complete event
- design of questionnaires and interviews
- Questionaire
- face to face, by post, or online
- need to be piloted
- close or open q's
- number of q's and order
- clear lang
- avoiding leading or bias q's
- one q at a time
- Interview
- face to face, or telephone
- preliminaries to int.
- the questions
- the interview provedure
- semi-structures
- self-presentaton
- decide how it is to be recodrded
- Questionaire
- operationalize variables
- IV and Dv
- pilot study
- To find problems with
- design
- clarity of standardised instructions
- measuring iinstruments
- To find problems with
- control of extraneous variables
- if not they become extraneous variables
- they can effect DV
- random error
- cant be predicted
- e.g. room temp, ppts motivation, state of mind
- cant be predicted
- Costant errors
- affect DV consistently
- e.g. individual differences
- affect DV consistently
- reliability
- Testing Reliability
- split-half method
- Test-retest
- Testing Reliability
- validity
- Testing
- face validity
- content validity
- concurrent validity
- predicitve validity
- Testing
- ethics
- sampling
- demand characteristics
- investigator effects
- aims
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