Examlex
What is vitamin A's role in vision? What happens to your eyes when you don't get enough vitamin A?
Pretreatment Differences
Variations among participants in a study that exist before the intervention or treatment is applied.
True Experimental Design
A research design that includes random assignment of participants to conditions and manipulation of an independent variable to determine its effect.
Random Assignment
A method used in experiments for distributing participants among various groups in a study, ensuring that each has an equal chance of being assigned to any group, to minimize bias.
Field Settings
Real-world environments outside of the laboratory where research is conducted or observations are made in a natural context.
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