During Piaget's preoperational period, knowledge of the world is based on an infant's sensory and

Car salesmen often encourage a test drive. According to the ________, if they can get you in the car their chance of making a sale goes up!

a) the door-in-the-face approach b) low-ball technique c) the foot-in-the-door tactic d) that's not all method

Rick notices that his voice has been getting deeper and hair is growing on his chest. Which endocrine gland produces hormones that are responsible for these changes?

a) gonads b) adrenal c) pancreas d) pituitary