On the first trial, the rat had to press the bar three times to get a pellet of food. On the second trial, seven bar presses were needed. Although it continued to vary from trial to trial, on the average the rat was reinforced for every five bar presses. The rat is on a schedule of reinforcement. a) fixed-interval. b) fixed-ratio. c) variable-ratio.
d) variable-interval.

Astudy that involves interviews of adults is eligible for expedited review. the researcher wants to add an adolescent population (aged 12 to 17) to the study and has designed a parental permission and assent process. no additional changes are planned. which of the following statements about review of the revised protocol is accurate? the research would only be eligible for expedited review if the adolescents are capable of understanding the same consent forms used for the adult population. the research would only be eligible for expedited review if the adolescents have been declared to be emancipated minors. the new research would need full review by a convened irb because children are a protected population. unless the nature of the questions would raise the level of risk to > minimal for adolescents, the research would still qualify for expedited review.

Americans often refer to a country that is not the united states as a

Which statement best explains the "culture of life? " (plato) a. it is the belief that all life is sacred and the implementation of policy in line with that vision. b. it is the idea that human embryos should be used to find cures to medical conditions. c. it is the belief that god created the world and that no one should meddle in affairs of life and death. d. it is the belief that human beings have the right to determine when and how they should die.