Researcher bias		An experiment in strictly controlled conditions
Null hypothesis		to make clear what is being measured
Hawthorne effect		predicts that there wil be no difference when IV is manipulated or that it is due to chance
Experimental hypothesis		predicts the exact result of the manipulation of the IV on the DV
Confounding variables		researchers do not control variables in this type of experiment
Dependent variable		the variable directly manipulated by the experimenter in an experiment
natural experiment		the extent to which the experimental situation represents the real world
Independent variable		When people act differently because they are in an experiment
double blind control		variable measured after manipulation of the IV
field experiment		the purpose of the experiment
Control condition		When participants guess aim of experiment and change their behaviour
laboratory experiment		when the experimenter is influenced by what they expect to see
Single blind control		An experiement conducted in a real world setting where experimenters manipulate the variables
aim		when participant and researcher don't know what the experiment is about
Demand characteristics		when participants don't know what the study is about
operationalize		A point of comparison for the experiemental condition
Ecological validity		undesirable influences on the IV/DV relationship