Due Today at 159 PM MST 9. Contraating a repeated-measures research design with

Question

Due Today at 159 PM MST 9. Contraating a repeated-measures research design with matched-sukjects and Independent-measures designs Aa Aa Previous studies have shown that playing video games can increase visual perception abilities on tasks presented in the "gaming zone of the screen (within 5 degrees of the center). A graduate student is interested in whether video games increase peripheral visual perception abilities or decrease attention to peripheral regions because of foais on the garming zone. He has participants complete a difficuit spatial perception task to determine baseline levels of their abilities. Subjects then play an action videa 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 this study, he used a repeated-measures design and compared the adults' baseline scores with their scores after playing the action video game. However, his results were ariticzed the spatial perception task twice-rather than being attributed to any effect of playing the action video game. Which of the following are better designs for investigating whether video games increase peripheral visual perception because some argued that the observed changes in scores could have been attributed to practice-as they completed abilities or decrease attention to peripheral regions because of focus on the gaming zone? Check all that apply The independent measures design with random assignment to the control and treatment groups. The graduate student could randomly assign half of his sample to play the action video game and half to serve as a control group. He could use an independent measures t test to compare scores from the spatial perception task administered to both groups after the treatment group played the action video game. The repeated-measures design, skipping the baseline test: The graduate student could use a 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 matched-subjects design: The graduate student could use the baseline scores to match each person to another 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 still complete the spatial perception task twice, but only those not assigned as controis would play the action video game. He could then use a repeated-measures t test comparing the difference in the final scores between the member of the pair who played the action video game and the member who did not. The independent-measures design with assignment by baseline scores to the control and treatment groups The graduate student could assign those with the lowest baseline scores to play the action video game and have the rest serve as a control group. Both groups would 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 independent-measures t test to compare the scores from the two groups 0 Type here to search

Explanation / Answer

Since we have test if there is and increase in ability beacause of the task, we will have to conduct the baseline test. Among the given options, the matched subjects design and the independent-measures design with random assignemnt are the only options which are viable. In the matched subjects design option the factor of having the baseline test being taken twice comes in effect and prohibits truely testing whether the increase is entirely due to video games.

Hence the correct option would be,

The independent measures design with random assignment to the control and treatment groups

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