One generally has to specify the real limits for discrete variables since they cannot be measured accurately

Which of the following students provides the most accurate comparison between the prototype approach and the exemplar approach?

a. Tariq: "The prototype approach works well for concepts that are nouns, whereas the exemplar approach works well for concepts that are verbs, especially verbs that show action." b. Clifford: "The prototype approach says that concepts are associated with one best example of a category; the exemplar approach says that concepts are associated with many specific examples of a category." c. Ekaterina: "At first, researchers emphasized that these two approaches would be very different from each other; now researchers say that they are identical, when focusing on everyday objects and organisms." d. Lynne: "The prototype approach emphasizes items that exist in real life; the exemplar approach emphasizes geometric figures that don't exist in real life.

Which of the following statements best summarizes the relationship between hormones and emotions?

The normal progression of the HPA axis is the primary controller of emotions in adolescents, but the axis becomes inactive in adults. While the HPG axis is hyperactive in early adolescence, it comes under mental control as the adolescent matures. The relationship is reciprocal—that means that sometimes hormones trigger emotions, but emotions can trigger the release of hormones as well. Emotions are mostly a result of social and cultural learning. These learned emotions, in turn, trigger the release of hormones