​LaTanya is only two years old, and recently she has begun playing with an imaginary friend whom she has named Bonnie. LaTanya’s parents wonder why this is occurring, as LaTanya has two older siblings and often has play dates with other children her own age. What would you advise her parents?

​According to a research study described in your textbook, parents are more likely to encourage

​Imagine that you are standing on a pair of railroad tracks. As you look down at your feet, the tracks look a certain distance apart. As you lift your head and watch the tracks move away from you, they appear to get closer together until they converge at the farthest point. This bit of visual trickery is called

​Which of the following ranges represent the possible values of a correlation between two variables?

​Private speech is to ____ as inner speech is to ____.

​Whose mother most likely took thalidomide while pregnant because she was unaware its potential to harm her baby?

​Although identical twins share 100% of their genetic code and are often similar, they are never truly “identical.” Which of the following explains these differences?

​Your textbook discusses three different types of cries that a baby can produce. Which of the following is not one of them?

​Which type of study typically needs the smallest sample of participants?

​Giselle is three weeks old and during a diaper change she looks up at her mother and smiles. Her mother gets very excited and immediately tells her husband, Chin, what happened. Since Chin has read your textbook, he thinks to himself: