An experimental protocol requires that a nutrient deficiency be induced to assess its effects on memory. what is the most appropriate study design to use to address this question?

The most appropriate study design to use to address this question would be of randomized controlled trial.

Explanation:

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

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