The independent variable manipulated by Tryon in his studies of maze running by rats was
A) how quickly rats could navigate a maze.
B) the genetic history of the rats.
C) the number of errors made by rats in running a maze.
D) inducement of a genetic mutation in the rats.
E) sample size.

Question

Quizplus · Accepted Answer

Tryon's studies focused on the genetic basis of learning ability in rats, specifically selecting and breeding rats based on their maze-running performance to create strains of "maze-bright" and "maze-dull" rats. This means the independent variable he manipulated was the genetic history of the rats.

The Independent Variable Manipulated by Tryon in His Studies of Maze