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In: Psychology

Subjects in the weapon condition were only slightly, but not significantly, less accurate than controls on...

Subjects in the weapon condition were only slightly, but not significantly, less accurate than controls on the 20-item questionnaire. Weapon present subjects were correct on 45.8% of the items, while control (weapon absent) subjects were correct on 50.3% of the items, t(34) = 1.37, p > .05, one tailed.

What kind of study design is this (experimental or correlational)?

If experimental, what is the independent variable?

If experimental, what is the dependent variable?

What kind of statistical test did the author run, and how do you know the used this test?

What do you think the null and alternative hypotheses are in this study? You might have to guess, but make it an educated guesses

Solutions

Expert Solution

What kind of study design is this (experimental or correlational)?

This is an example of an experimental design.

If experimental, what is the independent variable?

The independent variable is weapon focus.

If experimental, what is the dependent variable?

The dependent variable is perceptual accuracy.

What kind of statistical test did the author run, and how do you know the used this test?

The t-test is used in this case because significant differences between the two conditions of the experiment (weapon present and weapon absent) are being checked. Also, the t-statistic is reported in the paragraph.

What do you think the null and alternative hypotheses are in this study? You might have to guess, but make it an educated guesses

Null hypothesis: Weapon focus has no significant impact on perceptual accuracy.

Alternative hypothesis: Weapon focus leads to significant decrease in perceptual accuracy.

Hayet Jeridi answered 1 year ago
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