Lynn sleepwalks, while her younger brother has night terrors. Both of these sleep disturbances occur during

One barrier to the use of group learning in the American classrooms is the view by some parents and teachers that students should strive for independence and self-sufficiency in their learning. Thus, the barrier to the use of group learning would be classified as a(n) __________ barrier

a. emotional b. learned c. cultural d. perceptual

Which of the following is true of premenstrual syndrome?

A) It is more severe than premenstrual dysphoric disorder. B) It cannot be treated or prevented. C) It refers to the absence of menstruation. D) It may be linked to hormonal fluctuations.