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Abstract

Driving simulator studies are usually designed to collect repeated measures on each participant. This design has different implications for the power of within and between-subject effects that needs to be recognized by researchers. The power for between-subject variables decreases when additional measures are collected on the within-subject variables. However, the power for the main and interaction effects of the within-subjects variables increases as more observations are collected on one participant. If the main interest of the experiment is a between-subject effect, such as age, then a completely randomized design can provide the same power with fewer participants. Through a case study, this paper demonstrates how the power changes between a repeated measures design and a completely randomized design.

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References

Boyle

Mannering

(2004). Impact of traveler advisory systems on driving speed: Some new evidence. Transportation Research Part C, 12, 57–72.

Bradley

D. R.

Russell

R. L.

(1998). Some cautions regarding statistical power in split-plot designs. Behavior Research Methods, Instruments, & Computers, 30(3), 462–477.

Breckenridge

R. L.

Dodd

M. O.

(1991). Locus of control and alcohol placebo effects on performance in a driving simulator. Perceptual and motor skills, 72(3 Pt 1), 751–756.

Brouwer

W. H.

Waterink

Van Wolffelaar

P. C.

Rothergatter

J. A.

(1991). Divided attention in experienced young and older driver: Lane tracking and visual analysis in a dynamic driving simulator. Human Factors, 33, 573–582.

Cohen

(1988). Statistical Power Analysis for the Behavioral Sciences (Second ed.). New Jersey: Lawrence Erlbaum Associates, Publishers.

Cohen

(1990). Things I have learned (so far). American psychologist, 45, 1304–1312.

Donmez

Boyle

Lee

J. D.

(in press) The impact of distraction mitigation strategies on driving performance. Human Factors.

Findley

Fabrizio

Knight

Norcross

B. B.

La Forte

A. J.

Suratt

P. M.

(1989). Driving simulator performance in patients with sleep apnea. American review of respiratory diseases(140), 529–530.

Horrey

W. J.

Wickens

C. D.

(2004). Driving and side task performance: The effects of display clutter, separation, and modality. Human Factors, 46(4), 611–624.

10.

Lee

J. D.

McGehee

Brown

T. L.

Reyes

(2002). Collision warning timing, driver distraction, and driver response to imminent rear end collision in a high fidelity driving simulator. Human Factors, 44(2), 314–334.

11.

Meehl

P. E.

(1978). Theoretical risks and tabular asteriks: Sir Karl, Sir Ronald, and the slow progress of soft psychology. Journal of Consulting and Clinical Psychology, 46, 806–834.

12.

Minderhoud

M. M.

Bovy

P. H. L.

(2001). Extended time-to-collision measures for road traffic safety assessment. Accident Analysis & Prevention, 33, 89–97.

13.

Murphy

K. R.

Myors

(2004). Statistical Power Analysis: A simple and general model for traditional and modern hypothesis testing. (Second ed.). Mahwah, NJ: Lawrence Erlbaum Associates.

14.

Reed

M. P.

Green

P. A.

(1999). Comparison of driving performance on-road and in a low-cost simulator using a concurrent telephone dialing task. Ergonomics, 42(8), 1015–1037.

15.

Rizzo

McGehee

Dawson

Anderson

(2001). Simulated car crashes at intersections in drivers with Alzheimer disease. Alzheimer Disease and Associated Disorders, 15, 10–20.

16.

Syzlek

J. P.

Pizzimenti

C. E.

Fishman

G. A.

Kelich

Wetzel

L. C.

Kagan

, et al. (1995). A comparison of driving in older subjects with and without age-related macular degeneration. Archives of ophthalmology, 113(8), 1033–1040.

17.

Tsimhoni

Green

(2001). Visual demand of driving and the execution of display-intensive in-vehicle tasks. Paper presented at the Human Factors and Ergonomics Society 45th Annual Meeting, Santa Monica, CA.

18.

Vicente

K. J.

Torenvliet

G. L.

(2000). The earth is spherical: Alternative methods of statistical inference. Theoretical Issues in Ergonomics, 1 (3).

19.

Vogel

(2003). A comparison of headway and time to collision as safety indicators. Accident Analysis & Prevention, 35, 427–433.

Driving Simulator Experiments: Power for Repeated Measures vs. Completely Randomized Design

Abstract

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