History Bookmarks Window Help Attempts Average: 12 11. Contrasting a repeated-me

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History Bookmarks Window Help Attempts Average: 12 11. Contrasting a repeated-measures research design with matched-subjects and independent-measures designs Previous studies have shown that playing video games can increase the "gaming zone" of the screen (within S degrees of the center). A graduste student is interested in visual perception ablities on tasks presented in games increase peripheral visual perception abilities or decrease attention to peripheral regions because of foc the gaming zone. He has participants complete a difficult spatial perception task to determine baseline levels of the ablities. Subjects then play an action video game (a first-person combat simulation) for 1 hour a day over 10 days Subjects then complete the difficult perception task for a second time The first time the graduate student conducted thi because some argued that the observed changes in scores could have been attributed to pratice- Which of the following are better designs for investigating whether video games increase a repeated-messures design and compared the scores with their scores after playing the action video game. However, his results were cribicised study, he used the spatial perception task twice-rather than being attributed to any efflect of playing the action video game. peripheral visual perception abilities or decrease attention to peripheral regions because of focus on the gaming zone? Check all that apply The repeated-measures design, skipping the baseline test: The graduate student repeated-measures design as he did originally, but have the study participants skip the baseline test and use only the results of the test after playing the action video game The independent-measures design with assignment by baseline scores to the control and treatment proups The graduate student could assign those with the lowest baseline scores to play the action video game and could use a the rest serve as a control group. Both groups wouls still complete the spatial perception task twice, but only those not in the control group would play the action video game. He could then use the t test to compare the scores from the two groups ? The independent-measures design with radom assignment to the control an, treament groups: The gradate student could randomly assign haif of his sample to play the action video game and hait to serve as a control group. He could use an independent-measures t test to compare scores from the spatial perception tasi administered to both groups afte the treatment group played the action video game The matched-subjects design: Th graduate student could use the baseine scores to match each person to snother with a similar score. Then he could randomly assign one person in each pair to play the action video game and the other person to serve as a control. Everyone would stll complete the spatial perception twice, but only those not assigned as controls would play the action video game. He could then use a measures t test comparing the difference in the scores between the member o played the action video game and the member who did ot da E????? 8 4

Explanation / Answer

Option 4 is a better design for investigating whether video games increase peripheral visual perception abilities or decrease attention to peripheral region.

We will use the matched pair designed and randomly assign the participant to treatment which reduces the chances of biaseness as occured in previous sudy and improves the within group variance.

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