Because between-subjects experiments use a different group of participants for each treatment condition, one concern is that the participants in one treatment are noticeably different—for example, older, faster, or smarter—from the participants in another treatment. In the Katona experiment, how can the researcher be reasonably confident that the students in the understanding group were not considerably smarter than the students in the memorization group and that the difference in performance isn't simply caused by intelligence? The two groups were roughly equivalent when assigned to the two treatments. The same individuals participated in both treatment conditions.

Afull irb committee meeting is convened and one agenda item is a new research proposal to evaluate how mothers interact with their learning-disabled child. the inclusion criteria require the children to be a minimum of five years of age. the protocol requires the mother of the child to look at the child without any expression and not to talk to the child for three minutes. the committee determined that the mother's required task may upset the child. the irb approved the study with appropriate language in the parental permission form regarding the possibility that children might become upset. after the start of the study, the principal investigator reports to the irb that, as expected, one of the children became upset. the incident was handled according to the protocol and the child is fine. what should the irb do with regard to this report?

Which institution includes radio televisions and movies

If you rub a balloon on a piece of fabric or carpeting and then hold it against your head, your hair can stand on end. use what you have learned in this lesson to explain why this happens.