Name: ID: A 13. A study was done in Pueblo, CO year after a publie smoking ban h

Question

Name: ID: A 13. A study was done in Pueblo, CO year after a publie smoking ban had been enacted. The researchers who conducted this study used aln) to compare the pattern of heart attack rates across the year before and the design. a. noninterrupted time-series b. interrupted time-series c. one-group posttest-only pent control group 14. Order effects are particularly problematic for in designs, but group differences are a problematic designs b. dependent, independent c. within-subjects, between-subjects For a within-subjects experiment, one of the primary sources of bias is a. group differences that may exist within treatment conditions. b. c. d. 15. individual differences that may exist between treatment conditions. the risk that one treatment condition may influence scores in other treatment conditions. the risk that one (or more) of the treatment conditions will have no influence on the participants' scores. A researcher designs a study to determine whether female preschoolers prefer sweetened or unsweetened cereal. The researcher uses a box of sweetened colorful cereal and a box of unsweetened tan colored cereal. The research finds that the group of preschoolers ate more of the sweetened colorful cereal and therefore prefers the sweetened cereal. a. b. c. d. 16. Which two variables are confounded in this experiment? color of the cereal and children's gender color of the cereal and sweetness of the cereal sweetness of the cereal and amount of eating children's gender and amount of eating If one of the treatment conditions in an experiment is expected to have a permanent effect on the participan that will influence their scores in later treatments, then the researcher should probably a. increase the amount of time between treatment conditions. b. counterbalance the order of treatment. c. decrease the amount of time between treatment conditions d. use a between-subjects design 17. A design in which different participants are randomly assigned to the various treatment conditions in an experiment is adesign. a. single-subjects b. between-subjects c. within-subject d. matched groups 18.

Explanation / Answer

13 The correct answer is Option B. The researchers have used an interrupted time series design.

14. The correct answer is Option C. Order effects are a problem for within subjects design and group differences are a problem for between subjects design.

15. The correct answer is Option C. The bias in within-subjects design is the risk that one treatment condition may influence the scores on other treatment conditions.

16. The correct answer is Option A. Colour of the cereal and gender are the confounding variables in the study.

Please post the other questions separately.

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