Lewin (1948) argued that

a. social phenomena are too complex to be studied using the experimental method.
b. first-hand experience of the social world is enough to provide accurate information about social behavior.
c. the idea that adequate concepts about the social world can be derived from everyday experience is notjustifiable

Which of the following are chemical messengers?

a. Synaptic vesicles b. Receptor sites c. Neurotransmitters d. Potassium ions

If you witnessed a severe accidents, what would have the most influence on your decision to help those who were injured?

a. Your job involves first aid, so you shouldn't be expected to do it for free. b. The individuals who were injured are violating the social responsibility norm. c. The individuals who were injured are engaged in costly signaling. d. You have a set of friends and family members you feel very close to.