research methods
- Created by: sophiemai
- Created on: 18-04-19 09:18
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- research methods
- experimental methods
- aim- purpose of study, hypothesis- relationship between variables- directional- specifeed difference - non dirsctional difference stated, IV - manipulated, DV-measured operationaisation - asctually measuring effect of IV
- control of variables
- extraneous v - may effect results, muddy them, unsystematic. confounding v- could explain results by self. demand charcateristics - cues leading to changed behaviours. investigator effects- e.g. leading questions. randomisation - reduce bias, random generator. standardisation - same formula for every particpant
- experimental design
- independant groups - one person does one IV. repeated measures- one person does both IVs. matched pairs- matced then each do one IV
- eval IG; 1- less ecomonic 2- order effects not a poblem
- eval RM; 1- order effects so abba 2- variablles controlled
- eval MP; 1- less order effects 2- time consuming
- types of experiment
- lab - highly controlled situ
- eval; 1- high control over EV 2- replication easier = validity 3- low exteral vailidity (genralisability) 4- low mundane realism
- feild - IV manipulated in natural setting
- eval; 1- higher mundane realism 2- high external vaildity 3- ethical issues
- natural - natural IV taken advatage of
- eval; 1- high external validity 2- studies not normally allow can happen 3- rare 4- not randomly allocated
- quasi - Iv based on exsistiing difference
- eval; 1- controlled 2- confounding variabes due to non random allocation
- lab - highly controlled situ
- sampling
- random s = generator, systematic s = every nth number, stratisfied s= population refected, oppitunity s = anyone willing, volunteer s = choose to partake
- eval; RS- no researcher bias, time consuming. ** no RB. ** noRB most representive. OS cheaper & convinent. VS volunteer bias
- ethical issues
- informed consent, deception, protection from harm privacy & confidentiallity
- pilot studies & procedures
- small version done to test working, find problems
- single blind - ppt unaware vs double blind- both ppt and doc unaware
- observational technique
- naturalistic - where behaviour usually occurs, controlled - more control over variables
- jhy
- experimental methods
- kh
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