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Research methods
Experimental techniques
Controlling extraneous variables
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Created by
kai jones
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Cards (9)
Give three ways a researcher can control for extraneous variables.
(C)
ounterbalancing
Random
allocation
(S)
ingle blind
(D)
ouble blind
(R)
andomisation
(St)
andardisation
What is a demand characteristic?
Any
cue
from the
researcher
or the
situation
that may be interpreted by participants as revealing the
purpose
of the
investigation.
What is an investigator effect?
Any effect of the
investigators behaviour
(
conscious or unconscious
) on the
dependent variable.
What can investigator effects include in terms of the investigators behaviour?
The
selection
of or
interaction
with participants during the
research
process.
What can investigator effects lead to?
Participants changing their
behaviour
within the
research
situation.
What can be introduced to overcome investigator effects and demand characteristics?
Double blind
trails
What can be done to eliminate demand characteristics?
Single
blind or
double
blind trails
What can be done to eliminate investigator effects?
Double blind
trail
What would happen in a drug trail which uses double blind trails.
Both the
participant
and the
researcher
don't know who has the
placebo
or the
real drug.