Chapter 3, Section 2, Exercise 057bd Playing Video Games A new study provides so
ID: 3183418 • Letter: C
Question
Chapter 3, Section 2, Exercise 057bd Playing Video Games A new study provides some evidence that playing action video games strengthens a person’s ability to translate sensory information quickly into accurate decisions. Researchers had 23 male volunteers with an average age of 20 look at moving arrays on a computer screen and indicate the direction in which the dots were moving.1 Half of the volunteers (11 men) reported playing action video games at least five times a week for the previous year, while the other 12 reported no video game playing in the previous year. The response time and the accuracy score were both measured. A 95 % confidence interval for the mean response time for game players minus the mean response time for nonplayers is negative 1.8 to negative 1.2 seconds, while a 95 % confidence interval for mean accuracy score for game players minus mean accuracy score for nonplayers is negative 4.2 to plus 5.8. 1Green, et al., ‘‘Improved Probabilistic Inference as a General Learning Mechanism with Action Video Games,” Current Biology, 2010; 20(September 14): 1. (a) Is it likely that game players and nongame players are basically the same in response time? If not, which group is faster (with a smaller response time)? Likely to be basically the same... Not likely to be the same, and game players are faster.... Not likely to be the same, and nongame players are faster...
(b) Is it likely that game players and nongame players are basically the same in accuracy? If not, which group is more accurate?
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Likely to be basically the sameExplanation / Answer
Since 0 lies in the 95% confidence interval (-4.2,5.8) for the response time of nonplayers, it means that nonplayers response time is not significantly different from 0. On the other hand, for players, the 95% confidence interval is (-1.8,1.2) which means that there is response time is significantly lesser as 0 does not lie in this interval. Hence, game players are more accurate.
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