Examlex
A widowed spouse's remarrying after the age of 60 has no effect on his or her Social Security eligibility.
Random Group Assignment
A method in experimental design to ensure every participant has an equal chance of being assigned to any group, thus minimizing preexisting differences between those assigned to different groups.
Construct
An abstract concept that is specifically chosen or created to explain a given phenomenon.
True-Experimental Design
True-experimental design is a type of experimental research methodology that involves the manipulation of variables, control of extraneous variables through random assignment, and the comparison between a control group and one or more experimental groups to determine causal relationships.
Cause and Effect
A relationship between two events where one event (the cause) directly results in the other event (the effect).
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