Examlex
A researcher does a study of a mathematics program in a one-group pretest-posttest design. She gives the group of second graders a multiple-choice pretest. Unknown to her, the children had never taken a multiple-choice test. The children scored higher on the same test given at posttest. She argues that the children improved because of the mathematics program. That the children had never taken a multiple-choice test before and showed improvement at posttest suggests that one possible threat to her conclusion is a:
First Items
The initial elements in a series or list, often given special attention due to their primacy position.
Anterograde Amnesia
An inability to form new memories.
New Memories
The process of forming and storing new information in the brain, which can involve converting short-term memories into long-term memories.
Inability
The state of lacking the power, means, or opportunity to accomplish a task or action.
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