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psychology paper 3
research methods
validity
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Cards (14)
define validity?
extent to which
tool measures
what it
sets out
to
measure
accuracy
!
name types of validity?
internal
external
-
ecological
,
population
,
temporal
explain internal validity?
extent to which we can say that
test measures
what it is
supposed
to be
measuring
&
findings
are
due
to
iv
&
nothing else
can establish
true cause
&
effect relationship
if
evs
are
controlled
3 ways to improve internal validity?
evs must be
minimised
careful planning
&
careful choice
of
research design
should be used
lab studies
often have
higher internal validity
than
field
explain external validity?
extent to which
findings
can be
generalised
explain ecological validity?
how
true
to
real life
the
research
is & whether we can
generalise
it to
real life situations
3 ways to improve ecological validity?
conduct
experiments
in more
natual environment
use
tasks
that represent
everyday life
use
materials
that represent
everyday life
explain population validity?
how
true
to the
population
the
sample
is
how
representative
sample is of
target population
you are
interested
in
studying
3 ways to improve population validity?
conduct studies on
large sample sizes
use
random
/
stratified sampling
to ensure
sample accurately
reflects
target population
make sure there is
variety
of
people
explain temporal validity?
extent to which
findings
of a
study
/
theory
are
relevant
in
todays society
how to improve temporal validity?
do
test again
in
modern day
to see if
results
are still
accurate
2 ways of assessing validity?
concurrent
face
explain concurrent validity?
how
closely scores
on
test match
a
different measurement
from
same participant
explain face validity?
less rigourous
involves looking at test to see if they are
genuinely measuring
what it is
supposed
to be
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