Professor Grant is interested in studying the development of a sense of humor. She collects data from groups of 6-year-olds, 16-year-olds, 26-year-olds, and 46-year-olds. What type of research design is Professor Grant using?

Which of the following is a message that your text suggests parents should communicate to their children about sexual abuse?

A) "Anything an adult does with your genitals is dirty and wrong." B) "There are people in the world who want to hurt you, so always be careful and never take your clothes off in public." C) "Any touches by adults are bad touches, and some touches by other children are bad touches. Tell me about all touches." D) "Never keep a bad or scary secret from me, even if someone tells you to, you should tell me."

Vygotsky referred to the difference between what a child can accomplish unassisted, and what the same child can accomplish in the context of a social interaction, as that child's:

a. range of accommodation b. zone of proximal development c. level of assimilation d. psychosocial developmental stage