A particular college has some very poor instructors. In a report to its regional accrediting agency, a college administrator used these words to describe the situation: "sub-optimal classroom practitioners." This description is an example of

Research suggests that there may be some genetic contribution to the development of many anxiety disorders, but other studies have found that __________ is/are primarily caused by environmental rather than genetic factors

a. panic attacks b. generalized anxiety disorder c. phobias d. obsessive-compulsive disorder

The naming explosion typically occurs at 18 months, but the timing of this event varies widely for individual children. Which of the following is NOT correct regarding individual differences in word learning?

a. Twin studies find that vocabulary size is more similar in identical twins than in fraternal twins indicating a role for genetics. b. Children have larger vocabularies when they are exposed to high-quality language. c. Children who have difficulty remembering speech sounds accurately find word learning particularly challenging. d. Children learn fewer words when their parents' speech is rich in different words and is grammatically sophisticated.