An Experiment Was Done to Compare the Effect of Having

question 16

Multiple Choice

An experiment was done to compare the effect of having a conversation via a hands-free mobile phone, having a conversation with an in-car passenger, and no distraction (baseline) on driving accuracy. Twenty participants from two different age groups (18-25 years and 26-40 years) took part. All participants in both age groups took part in all three conditions of the experiment (in counterbalanced order) , and their driving accuracy was measured by a layperson who remained unaware of the experimental hypothesis.
-Which of the following sentences is the correct interpretation of the main effect of distraction?

• A)There was a significant main effect of distraction, F(2, 36) = 45.95, p < .001.This effect tells us that driving accuracy was different for no distraction, hands-free conversation and in-car passenger conversation in the two age groups.
• B)There was no significant main effect of distraction, F(2, 36) = 45.95, p > .05.This effect tells us that none of the distraction groups significantly distracted participants across both age groups.
• C)There was a significant main effect of distraction, F(2, 36) = 45.95, p < .001.This effect tells us that if we ignore the effect of age, driving accuracy was significantly different in at least two of the distraction groups.
• D)There was no significant main effect of distraction, F(2, 36) = 45.95, p = .719.This effect tells us that if we ignore the effect of age, driving accuracy was the same for no distraction, hands-free conversation and in-car passenger conversation.

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