About 30% of the world's population has a dietary deficiency of what nutrient?

The best use of an infant intelligence test is to

a. predict an infant's intelligence as an adult. c. assess an infant's development early in life. b. predict an infant's later school achievement. d. predict current scores on the Wechsler Scales.

The dopamine hypothesis of schizophrenia states that schizophrenia is caused by

A) damage to ascending dopamine fibers. B) a breakdown product of the neurotransmitter serotonin. C) overactivity of dopaminergic synapses. D) low levels of one or more of the monoamines. E) an imbalance between acetylcholine and dopamine within the frontal cortex.