What are the four commonly used readability indexes?

A proponent of the "contact hypothesis" would likely attempt to reduce the hostility that two groups show toward each other by

a. encouraging personal interaction between the members of the hostile groups in the pursuit of shared goals. b. reducing the amount of contact between members of the hostile groups. c. increasing any in-group bias that might be present within the groups. d. increasing the resources that are available to the groups.

Although punishment has several drawbacks, it is most effective when

a. it occurs several days after the behavior. b. the punisher uses reinforcement in addition to punishment. c. the punisher exhibits visible anger while punishing. d. the behavior is intermittently punished.