Question

In one study, half of the rats are given one food pellet each time they correctly run a maze, and the other half of the rats are given two food pellets each time theycorrectly run a maze. The researchers record the average amount of time it takes the rats to run the maze. In this study, the number of food pellets represents the
__________ variable.
independent

Answer 1

Researchers record the average time it takes rats to complete the maze. In this study, the number of feed pellets was independent as per Manipulation of the Independent Variable

Manipulation of the Independent Variable Again, manipulating an independent variable involves systematically altering its levels so that different groups of participants are exposed to different levels of that variable, or This means that the groups will be exposed to different levels at different times. Independent variables are variables that researchers manipulate to better understand how phenomena, structure, and behavior are related to the dependent variable and Alternative Hypothesis . Instrumental variables are the independent variables in an experiment. It's called "manipulated" because it's something you can change. That is, you can decide in advance whether to increase or decrease. Experiments should always have only one instrumental variable.

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