Posted: November 10th, 2016

Cohen has proposed some effect-size conventions based on the effects observed in psychology research in general because: A.researchers frequently need to decide whether the effect size that they have found allows them to reject the null hypothesis

Question 1 of 25 0.8 Points Effect size is a measure of: A.the difference between individual members of a sample B.the extent to which two populations overlap C.the extent to which two populations do not overlap D.the statistical significance of a research study Question 2 of 25 0.8 Points Which of the following is NOT a correct statement about effect size of a study finding: A.It provides much information about statistical significance. B.It is a standardized measure of lack of overlap between populations. C.It increases with greater differences between means. D.It can be converted to a standardized effect size. Question 3 of 25 0.8 Points According to Cohen’s conventions, for research that compares means, a large effect size in which only about 53% of the populations of individuals overlap would be: A..5 B..6 C..7 D..8 Question 4 of 25 0.8 Points Some IQ tests have a standard deviation of 16 points. If an experimental procedure produced an increase of 3.2 IQ points, the effect size would represent a __________ effect size. A.small B.medium C.large D.extra large Question 5 of 25 0.8 Points A standard verbal memory test is known to have a standard deviation of 10 points. If an experimental procedure produced an increase of 8 points, the effect size would represent a __________ effect size. A.small B.medium C.large D.unable to determine without additional information Question 6 of 25 0.8 Points In what way is effect size most comparable to a Z score? A.It can range from ?1 to +1 B.It provides a direct indication of statistical significance C.It provides a standard for comparison for results across studies, even studies using different measures D.All of the above Question 7 of 25 0.8 Points Cohen has proposed some effect-size conventions based on the effects observed in psychology research in general because: A.researchers frequently need to decide whether the effect size that they have found allows them to reject the null hypothesis B.it is usually difficult to know how big an effect to expect from a given experiment C.Cohen originally developed the relevant scales D.they are more accurate than figuring a minimum meaningful difference