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Psychology
Research methods
Variables and hypothesis
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Created by
Laurafleetham
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Cards (13)
What is a
dependant
variable?
What you are measuring
What is an
independent
variable?
What you change
What is a
control
variable?
What you keep the same
What is an extraneous variable?
Any other variable that could affect the IV
What is a
confounding
variable?
An extraneous variable that causes a change to the DV
What is operationalising?
Making a
variable
measurable
What is a hypothesis?
A
prediction
What is a directional (
one-tailed
) hypothesis?
Tells us
how
the IV will affect the DV
What is a non-directional (
two-tailed)
hypothesis?
Tells us the IV will
affect
the DV, but not how it will do this
What is a null hypothesis?
A null hypothesis is a statement that assumes there is no
significant
relationship or difference between
variables
What is an example of a directional hypothesis?
Caffeine will
increase
alertness
What is an example of a non-directional hypothesis?
Caffeine
will affect
alertness
What is an example of a null hypothesis?
There will be
no
change in alertness (DV) due to caffeine consumption. Any
change
in alertness is due to
chance