According to the learning perspective on prosocial behavior, people learn to help through reinforcement and ________

The main difference between a frequency distribution and a grouped frequency distribution is

that in a grouped frequency distribution: A) smaller categories are removed if they are not useful B) groups of participants can be compared sequentially C) smaller categories are combined into larger categories D) data for more than one group are included

Noah had learned to play Mozart's Concerto Number 21 when he was eight years old. He is now 30 and hasn't played the piano for 12 years, but his sister has asked him to play the concerto at her wedding. When Noah sits down to practice, he finds that he has the piece mastered in just a few hours, even though it took him weeks to learn the first time. This example illustrates

a. recognition as a measure of memory retention. b. recall as a measure of memory retention. c. relearning as a measure of memory retention. d. the impact of pseudoforgetting.