Limited-Population Designs
Before-After Designs
Matched-Group Designs
Standardization of Conditions
Experimental manipulation in which all participants in all levels of the independent variable
are treated in exactly the same way. Examples: Script, Protocol, and Automated Experiments
Experimental designs in which participants are sampled from a limited population so as to
standardize participants� background. Example: College Students.
Experimental designs in which participants are at first asked to complete baseline
measure and then are assigned to a experimental condition. Example: Word Memory
Experimental designs in which participants are measured on the variable of interest before
the experiment begins and then are assigned to conditions on the basis of their scores on
that variable. Example: IQ test.
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