You are babysitting your three-year-old niece and notice that she is acting very much like a character from a television show. Being an astute psychology student, you reason that you are most likely witnessing:

Animal studies suggest that _______________ can inhibit the process of neurogenesis

a. enriched environments b. stress c. physical exercise d. effortful mental activity

________ would be most likely to challenge the client's thoughts directly, showing him why certain thoughts are irrational and misguided

a. B. F. Skinner b. Albert Ellis c. Carl Rogers d. Sigmund Freud