Resumen
Summary Research methods notes
- Grado
- Institución
AQA a level psychology research methods notes. AO1 and AO3.
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Research methods, Research methods
Experimental design | Types of experiment
Research issues -
Extraneous variables :
Variables that are not the IV that can arrest the DV
↳ situational
eg time ,
weather
↳ ppt e g race , gender
.
.
↳
investigator effects eg now they ask the Q's
↳ demand characteristics
-
Pilot Studies :
Small-scale trial run of an investigation so research designs can be modified
Experimental designs -
Independant groups-ppts .
randomly allocated to g .
1 or g .
2 that take part in different conditions
↓ ve
ppts Unlikely to guess aims task ve Variables may be ↓ internal
-
.
or ppt. present -
validity
-
Repeated measures -
same ppts .
take part in all conditions or an experiment
↓ Variables ↑ internal
ve
ppt controlled >
- validity ve likely to guess aim task D C present
-
.
ppts. of - .
-
Matched pairs
-
2
groups of ppts .
that are matched on a ppt. Variable
the ppts Unlikely to guess aim of tash
-
ve need twice as ppts As R M expensive
many &
.
.
.
Types a experiment
-
Labatory experiment : A controlled environment where Evs can be . The
regulated IV is manipulated and
the DV is recorded
↓ ve EUs can be controlled >
- a 1 V- ve
. Controlled lab is artificial : behavio, nor natural -d external validity
Field
-
experiment
:
Research conducted in a natural setting
. The IV is manipulated and the DV is recorded
↓ ve ppts . More comfortable + more authentic behavior >
- able to be deneralised
-
Ve Observed changes in
Dr to the IV (E V ↓ internal
may nor be due . >
-
validity
-
Natural experiment -
the IV is
. The
naturally occurring DV may be naturally occuring eq exam results
but may be devised by experimenter
↓ ve may unethical to the (only practical option) ve
randomly allocated - ↓
-
be manipulate IV ppts. not 1 V.
Quasi experiment IV is based on a pre-existing difference between people eg . The
gender DV
-
-
may be naturally occuring eq exam results but may be devised by experimenter
↓ ve carried controlled-ve allocated
Often out in lab conditions + E Us .
ppts not
randomly >
-
ppt .
variables
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