experiments and variables

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Experiments and variables
An experiment is when 2 groups or conditions are compares to see if there
is a difference
Experiments will involve at least 2 different variables (independent and
There are 3 types of experiment: laboratory, field, natural
Independent variable is the one that is altered or changed to create 2
Dependant variable is the one that you measure
Operationalise variables are used to make the experiment easy to use and
Operationalise variables
This term means to word the variables in a way which makes then very clear
and testable.
Operationalised independent variables should include both
Operationalised dependent variables should relate to a number e.g. number
of..., score on..., rating on...
Non-Operationalised Operationalised
memory Pictures remembered in a minute
Happiness Number of times observed laughing in a
Music 2 different types of music played
(classical or hip hop)
Attachment Attachment type measured in strange
situation as type A,B,C


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