On average, behavioral-genetic studies estimate the heritability of intelligence to be:

Young Raina is just a few months old, and her parents delight in seeing her reaction to new sights and sounds. Her mother, Lianna, bought her a new toy that hangs from the handle of her car seat and sparkles brightly. When Raina first sees this new toy,

she smiles, coos, and stares at it intently. After just a few minutes, however, Lianna is surprised to see that Raina is looking away, and appears almost bored with this new toy. Developmental psychologists refer reduced responding to a familiar stimulus as __________. a. habituation b. stimulus decay c. the repeated response effect d. disinhibition

Compared to a muddy brick red, a fire-engine red is said to be more

a. assimilated. b. aqueous. c. saturated. d. accommodated.