Suppose a researcher wants to know whether frustration really does cause aggression. She collects a large number of experimental
studies that involve both children and adults, and that are conducted both in the laboratory and in the "real world" in both the United States and other cultures. She then conducts a(n) __________ to determine whether there is enough consistency in findings across studies to determine the generalizability of the relationship between frustration and aggression.
Meta-analysis is a survey in which the result of the studies are included in the review are statistically similar and combined and analyzed if the study is the same. It is a set of technologies that are used with several the research report to make a single and more precise estimate of the efforts of a study. The main aim of the meta-analysis is to increase the statistical power to deal with the controversy with when the subject study disagrees, to improve estimate size of effects and to try to answer the new question that is not posted previously in the study. But there should be a valid reason for combined the studies. there are several advantages of meta-analysis:
It allows investigators to pool data from many small trials and allow themselves for the secure conclusion.
If you want someone to do something just once, you should use small punishments; but if you want someone to develop a deep-seated attitude that lasts, you should use large punishments.
