Maturity I believe is the correct answer
Answer:
Facial feedback hypothesis
Explanation:
The facial feedback hypothesis states that facial movements can influence emotional experiences. In other words, making a particular face (such as smiling) can help you experience the related emotion (being happy). This is the case in the example. In this example, some students were making a face that resembled that of smiling. This led them to be happier than those who were not making the same face.
Answer: Variable-interval
Explanation:
Variable-interval schedule is the reinforcement schedule in which reinforcement is implied to response after certain passage of time.
This time is usually unpredictable as variable schedule.
According to the question, variable interval schedule is reinforced through Professor Wallace as he is going to give pop quizzes to students at uncertain time of interval which is not predictable or has varying schedule.
Other options are incorrect because fixed ratio schedule, variable ratio schedule and fixed interval schedule are not schedule on which Professor's surprise quiz will reinforce.Thus, the correct option is variable interval schedule.
A secondary source is a source about an event that was produced after the time period. In other words, the person who wrote the secondary source wasn't around to experience the time that he/she is writing about.
