A group of researchers investigates the effects of a vitamin supplement on animal memory.During the first part of the study,the animals learn to run a maze while they are not receiving the supplement; in the second part of the study,the animals learn to run a different maze while they are receiving the supplement.In each case,the researchers count how many trials it takes before the animals can run the maze pattern without making any errors.What is the independent variable in this study

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The independent variable is the one that is being manipulated or changed by the researchers in the study. In this case, the researchers are manipulating the presence or absence of the supplement in the animal's diet, which is the independent variable. The number of trials it takes to run the maze without making any errors is the dependent variable that is being measured as a result of the independent variable. The trials in which the supplement is used and the two different mazes used are not the independent variables in this study.

A Group of Researchers Investigates the Effects of a Vitamin