Which test was further validated by special group studies focused on individuals with cognitive deficits, such as traumatic brain injuries and autism spectrum disorder?

Chapter 8 discusses the term "graded structure" in connection with the prototype theory of semantic memory. The best example of this term is

a. the observation that we frequently make spontaneous generalizations. b. the structure of our knowledge during the tip-of-the-tongue effect. c. the arrangement of words in a specific category, from most prototypical to least prototypical. d. the fact that the terms "concept" and "category" are related but somewhat different from each other.

The percentage of school-age children that live in households headed by a single father is

1 percent. 3 percent. 4 percent. 6 percent.