Researchers studying the effects of videogame training on the cognitive abilities of older adults expose separate groups of male and female participants to a training condition and two other groups to a no-training condition in performance on a cognitive test. They then conduct a similar comparison involving male and female younger adults. In this study, the only true independent variable is:

Question

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The only true independent variable in this study is the videogame training condition, as it is the only thing that is being manipulated by the researchers. Age group and gender are both potentially confounding variables, as they could influence cognitive performance and are not directly manipulated by the researchers. Cognitive performance is the dependent variable, as it is what is being measured and compared between the training and no-training conditions.

Researchers Studying the Effects of Videogame Training on the Cognitive