Brooklyn was talking to her doll, who was riding with Brooklyn in her car seat. Brooklyn and her mother were headed to the supermarket. “Sit. You sit,” Brooklyn said to her doll. Then Brooklyn directed her comments to her mom. “Mom go store,” Brooklyn said. Brooklyn’s language is a good example of

Tom, who is 20 years old, asks his brother, who is 50 years old, what percentage of his friends used condoms when they had sexual intercourse when they were Tom's age. Tom also asks his own friends about their frequency of condom use

If Tom's friends and Tom's brother's friends are typical for people of their generations, you should expect that Tom's friends are about ____ likely to use condoms during intercourse. a. half as b. equally c. 1.5 times as d. 3 times as

The effect of a single independent variable is a (an)

a. main effect b. within-participants effect c. participant variable d. interaction e. moderator