A(n) __________ refers to a group of people who are raised during the same time period

A scientist trains a group of rats to run a maze to get food pellets. Another group of rats is trained to run the maze without receiving food pellets. At the end of the training,

the group receiving the food pellets runs the maze faster and with fewer errors. However, when the scientist begins giving the second group of rats food pellets for running the maze, they almost immediately begin running the maze as well as the first group. This improved performance is probably due to ________.

Janet is participating in an experiment where she is being asked to compare different concentrations of lemon juice as two drops of juice are dropped on her tongue at a time

On each trial, she is told to indicate if the two drops of juice are the "same" or "different" in terms of their lemon concentration. What technique is being used with Janet? a. Absolute threshold b. Difference threshold c. Reaction time d. Learning-time