A biopsychologist is interested in studying the effects of marijuana on cognitive skills by studying a group of 7 rats.He puts each rat in a maze and measures the time it takes the rat (in minutes) to find the cheese at the end of the maze.He then puts a mask on the rat and has it inhale marijuana smoke for 5 seconds.He then puts the rat back in the maze,and records its time to reach the cheese.Twenty minutes later he puts the rat back in the maze to test for lasting effects of the drug.The tables below summarize the data and part of the data analysis: 
What is the MSIV?
Definitions:
Emotional Expressiveness
The degree to which an individual outwardly displays emotions, feelings, or mood states through facial expressions, gestures, and verbal communication.
Testosterone
This hormone influences behaviors such as aggression and dominance, and is also important for the maintenance of overall health and well-being in both males and females.
Male Sex Organs
The male sex organs include both external and internal reproductive structures, primarily involved in sexual function and reproduction.
Nonshared Experiences
Experiences that are unique to an individual, contrasting with those shared with family members or close individuals, contributing to differences within groups.
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