Dr. Lyons studies moral development in children, and he wonders at what age children begin to believe that lying is okay if it is for a good reason (e.g., lying so as not to hurt someone's feelings). In order to study this, he asks children questions about lying. He tests children when they are 4 years old, and then tests the same children again when they are 6 years old, 8 years old, 10 years old, and 12 years old. What is the purpose of Dr. Lyons' study?
1) To determine at what age children begin to believe that lying is okay for a good reason
2) To understand the moral development of children
3) To examine the effects of age on attitudes towards lying
4) To test the same children at different ages