At a party, a friend of yours keeps popping balloons with a lighted cigarette. By the time he is about to pop the fifth balloon, you notice that your muscles tense and you squint each time the cigarette nears the balloon. Obviously,

a. the cigarette is a US.
b. the popping sound is a US.
c. squinting is a reinforcer.
d. shaping has occurred.

Psychologists studying infant memory want to determine at what age babies can remember specific events. an experimenter uses several puppets to demonstrate a series of actions while the infant watches. after a delay, the experimenter records how many of the actions the child imitates when playing with the puppets. what is the dependent variable?

Of the following choices, which ones are characteristics of west african society? select all that apply. a. arabic was the main language used when trading with other societies. b. christianity was the only religion practiced in villages. c. slaves had no rights and were only given specific farming tasks. d. skilled workers were a higher level in the caste system than traders. e. religious rituals encouraged the honoring of ancestors.

Which political reform gave people the power to put a proposed law on the ballot? referendum initiative direct primary recall