An Experiment Was Done to Compare the Effect of Having

question 19

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 regarding the results of the simple contrasts of the distraction variable is correct?

• A)The first contrast tells us that driving accuracy was not significantly different when having a conversation with a passenger compared to when having no conversation,F(1,18)= .03,p = .87.
• B)The first contrast tells us that driving accuracy was not significantly different when having a conversation with a passenger compared to having a conversation via a hands-free mobile phone,F(1,18)= .03,p < .87.
• C)The first contrast tells us that driving accuracy was significantly different when having a conversation with a passenger compared to when having no conversations,F(1,18)= .03,p = .001.
• D)The first contrast tells us that driving accuracy was significantly different when having a conversation with a passenger compared to having a conversation via a hands-free mobile phone,F(1,18)= .03,p < .87.

---

Definitions:

Generalizability

The extent to which the findings of a study or experiment can be applied to larger populations or different contexts beyond the original subjects or conditions studied.

Validity

The extent to which a test, measurement, or research accurately reflects or assesses the specific concept that it is intended to measure.

Constructability

A project management technique that reviews construction processes from start to finish during pre-construction phase to ensure efficient and feasible construction.

Predictive Validity

The extent to which a score on a scale or test predicts future performance on a related outcome.