Summary
Summary Research methods
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Psychology documents including: - research methods
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Experimental MethodVariable in
Experiment :
·
Independant Variable (IV) -
researcher changes or manipulate to establish cause and effect
Dependant Variable (DV) data that researcher measures , the should be the IV
effect caused by
-
·
Extraneo Variable (Ev) variable other than
It that the DV
may effect
· -
I
IV : not
talking or
DV : the child's language ability
EV : If other
people are talking to the childs
2
3 IV : What horror IV : is it a hot day or not
film DV : levels of aggression shown
DV : children other
having nightmares EU : variable
making them
aggressive e.g-traffic
·
-late for work
Ev :
maybe its the environment (thunder) scaring the children
types of experiments
Laboratory Experiment Field Experiment Natural Experiment
-
manipulates the IV -researcher has control -naturally occurring I
-
measure impact on the DV over 1V
the
-
typically conducted in an
highly controlled IV is manipulated everyday environment (real life)
-
-
usually qualitative data -measure DV -high ecological validity
-
on
collected -research with a view of -
low control over Ev
strict controlls EU a more natural behavior clear
cannot
identify -
cause
- -
over
by ethical (no demand characteristics
abiding issues effect
-
low replicability
highly replicable replicability low
-
- -
-
can determine cause and low demand characteristics -
low levels of ethics involved
effect -high ecological validity -
impossible to manipulate
-
low
ecological validity
-
ethical issues over consent variables
demand characteristics often time
increase
consuming
- -
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