Examlex
Opportunities and threats are usually driven by changes in one of the
Random Assignment
Assigning participants to experimental and control groups by chance, thus minimizing preexisting differences between the different groups.
Test Difficulty
The measure of how challenging an examination or a set of questions is, often determined by the proportion of test-takers who answer correctly.
Experimental Group
The group in an experiment that receives the variable being tested, contrasted with a control group that does not.
Randomly Assigned
A method used in experiments where participants are allocated to different groups in an unpredictable manner to reduce biases and ensure validity.
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