Vincent was walking to class when he saw Nathaniel. They both waved and said, "Hey, how are you?" over their shoulders, but neither one stopped to answer. This is what Berne would call a(n)

Which of the following is a common mistake that parents make when trying to stop unwanted behaviors?

A) They forget to use continuous schedules of reinforcement. B) They create intermittent schedules of reinforcement when they think they are punishing. C) They use intermittent punishment, when they should be using intermittent schedules of reinforcement. D) They use punishment too frequently.

The structure of DNA consists of a long molecule that looks somewhat like a ladder that has been "twisted." The shape of the DNA molecule is referred to as:

a. the double rope b. the twisted rope c. the double helix d. the Golgi apparatus