Figure 1. The Effects of Day and Required Speed on the Drivers’ Average Speed., line graph y-axis - average speed, (46-64), x-axis - day (1-5), data: "64 mph", "car following", "50 mph"

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DAY*SPEED; Unweighted Means
Current effect: F(8, 216)=11.679, p=.00000
Effective hypothesis decomposition

Figure 2. The Effects of Day, Required Speed, and Age on the Drivers’ Average Speed. series of 3 line graphs entitled :"64 mph", "car following", "50 mph" y-axis - average speed, (46-64), x-axis - day (1-5), data: "age young", "age middle age", age old age"

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DAY*SPEED*age; LS Means
Current effect: F(16, 216)=1.7167, p=.04517
Effective hypothesis decomposition

Figure 3. The Effects of Distraction and Age on the Drivers’ Average Speed. , line graph y-axis - average speed, (54-58), x-axis - distraction (no distraction, math operations, conversation), data: "age young", "age middle age", age old age"

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DISTRACT*age; LS Means
Current effect: F(4, 54)=3.5205, p=.01263
Effective hypothesis decomposition

Figure 4. The Effects of Distraction, Practice and Required Speed on the Drivers’ Average Speed. series of 3 line graphs entitled :"64 mph", "car following", "50 mph" y-axis - average speed, (46-64), x-axis - day (1-5), data: "no distraction ", "math", "conversation "

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DAY*SPEED*DISTRACT; LS Means
Current effect: F(16, 432)=16.278, p=.00000
Effective hypothesis decomposition

Fig. 5. The Effects of Distraction, Practice and Age on the Drivers’ Average Speed when required to maintain a speed of 65 mph. series of 3 line graphs entitled :"age: young ", "age: middle age ", "age:old age " y-axis - average speed, (40-70), x-axis - day (1-5), data: "no distraction ", "math", "conversation "

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DAY*SPEED*DISTRACT; LS Means
Current effect: F(32, 432)=2.3886, p=.00005
Effective hypothesis decomposition

Figure 6. The Effects of Practice and Age on the Drivers’ Speed Variance., line graph y-axis - average speed, (54-58), x-axis - day (1-5), data: "age young", "age middle age", age old age"

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DAY*age; Unweighted Means
Current effect: F(8, 108)=2.9620, p=.00491
Effective hypothesis decomposition

Figure 7. The Effects of Speed, Practice and Age on the Drivers’ Speed Variance, series of 3 line graphs entitled :"65 mph", "car following", "50 mph" y-axis - speed variance, (1-13), x-axis - day (1-5), data: "age young", "age middle age", age old age"

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DAY*SPEED*Age; Unweighted Means
Current effect: F(16, 216)=3.3095, p=.00003
Effective hypothesis decomposition

Figure 8. The Effects of Distraction and Practice on the Drivers’ Speed Variance, line graph y-axis - speed variance, (2.5-8.5), x-axis - day (1-5) data: "no distraction", "math operations", "conversation"

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DAY*DISTRACT; Unweighted Means
Current effect: F(8, 216)=59.592, p=.00000
Effective hypothesis decomposition

Figure 9. The Effects of Distraction, Practice and Age on the Drivers’ Speed Variance when Required to Maintain a Speed of 65 mph., series of 3 line graphs entitled :"age: young ", "age: middle age ", "age:old age " y-axis - speed variance, (0-18), x-axis - day (1-5), data: "no distraction ", "math", "conversation " key: "within factors: levels 65 mph"

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DAY*SPEED*DISTRACT*Age; Unweighted Means
Current effect: F(32, 432)=7.4251, p=.00000
Effective hypothesis decomposition

Figure 10. The Effects of Practice Speed and Age on the Drivers’ Average Lane Position., series of 3 line graphs entitled :"65 mph", "car following", "50 mph" y-axis - average lane position, (4.0-5.6), x-axis - day (1-5), data: "age young", "age middle age", age old age"

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DAY*SPEED*Age; Unweighted Means
Current effect: F(16, 216)=1.9549, p=.01729
Effective hypothesis decomposition

Figure 11. The Effects of Distraction, Practice, and Speed on the Drivers’ Average Lane Position, series of 3 line graphs entitled :"65 mph", "car following", "50 mph" y-axis - average lane position, (4.0-5.6), x-axis - day (1-5), data: "no distraction ", "math operations ", "conversation "

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DAY*SPEED*DISTRACT; Unweighted Means
Current effect: F(16, 432)=10.960, p=.00000
Effective hypothesis decomposition

Figure 12. The Effects of Distraction, Age, and Speed on the Drivers’ Average Lane Position.,series of 3 line graphs entitled :"age: young ", "age: middle age ", "age:old age " y-axis - average lane position, (4.2-5.6), x-axis - day (1-5), data: "no distraction ", "math", "conversation " key: "within factors: levels 65 mph"

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DAY*SPEED*DISTRACT*Age; Unweighted Means
Current effect: F(8, 108)=2.0104, p=.05180
Effective hypothesis decomposition

Figure 13. The Effects of Distraction, Age, and Speed on the Drivers’ Variance in Lane Position., series of 3 line graphs entitled :"no distraction ", "math operations ", "conversation" y-axis - variance in lane position, (0.4-1.8), x-axis - day (1-5), data: "65 mph ", "car following ", "50 mph "

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DAY*SPEED*DISTRACT; Unweighted Means
Current effect: F(16, 432)=16.254, p=0.00000
Effective hypothesis decomposition

Figure 14. The Effects of Practice and Required Speed on the Drivers’ Steering Wheel Deviations (in radians/second)., line graph y-axis - steering wheel deviations (rads/s), (0.45-0.80), x-axis - day (1-5) data: "65 pmh ", "car following ", "50 mph "

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DAY*SPEED; Unweighted Means
Current effect: F(8, 216)=1.8498, p=.06940
Effective hypothesis decomposition

Figure 15. The Effects of Age, Practice and Required Speed on the Drivers’ Steering Wheel Deviations (in radians/second).,series of 3 line graphs entitled :"age: young ", "age: middle age ", "age:old age " y-axis - steering wheel deviations (rads/s) , x-axis - day (1-5), data: "65 pmh ", "car following ", "50 mph "

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DAY*SPEED*Age; Unweighted Means
Current effect: F(16, 216)=3.0349, p=.00013
Effective hypothesis decomposition

Figure 16. The Effects of Age, Practice and Distraction on the Drivers’ Steering Wheel Deviations (in radians/second)., series of 3 line graphs entitled :"no distraction ", "math operations ", "conversation" y-axis - steering wheel deviations (rads/s), x-axis - day (1-5), data: "age: young ", "age: middle age ", "age: old age "

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DAY*DISTRACT*Age; Unweighted Means
Current effect: F(16, 216)=5.9764, p=0.00000
Effective hypothesis decomposition

Figure 17a. The Effects of Age, Practice and Speed Condition on the Drivers’ Steering Wheel Deviations (in rads/s), when Distracted by Requirement to Perform Math Operations. series of 3 line graphs entitled :"65 mph ", "car following ", "50 mph " y-axis - steering wheel deviations (rads/s), x-axis - day (1-5), data: "age: young ", "age: middle age ", "age: old age " key: "within factors: levels, math operations

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DAY*SPEED*DISTRACT*Age; Unweighted Means
Current effect: F(32, 432)=4.5506, p=0.00000
Effective hypothesis decomposition

Figure 17b. The Effects of Age, Practice and Distraction on the Drivers’ Steering Wheel Deviations (in rads/s), when Required to Maintain a Speed of 65 mph. series of 3 line graphs entitled :"no distraction ", "math operations ", "conversation" y-axis - steering wheel deviations (rads/s), x-axis - day (1-5), data: "age: young ", "age: middle age ", "age: old age " key: "within factors: levels, 65 mph

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DAY*SPEED*DISTRACT*Age; Unweighted Means
Current effect: F(32, 432)=4.5506, p=0.00000
Effective hypothesis decomposition

Figure 18. The Effects of Age and Practice on the Number of Errors in the Distracting Math Operations Task., line graph y-axis - average number of math errors, (0.0-4.5), x-axis - day (1-5), data: "age young", "age middle age", age old age"

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DAY*age; Unweighted Means
Current effect: F(8, 108)=4.8773, p=.00004
Effective hypothesis decomposition

Figure 19. The Effects of Speed Condition and Practice on the Number of Errors in the Distracting Math Operations Task., line graph y-axis - average number of math errors, (0.0-3.5), x-axis - day (1-5), data: "65 pmh ", "car following ", "50 mph "

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DAY*SPEED; Unweighted Means
Current effect: F(8, 216)=2.0460, p=.04246
Effective hypothesis decomposition

Figure 20. The Effects of Practice and Subjecive Workload Component on Subjective Workload Estimates*., line graph y-axis - subjective load rating, (2.0-8.0), x-axis - day (1-5), data: "mental-1", "physical-2", "speed-3", "work-5", "stress-6", overall-7"

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DAY*QUESTION; Unweighted Means
Current effect: F(20, 540)=3.5048, p=.00000
Effective hypothesis decomposition

Figure 21. The Effects of Practice and Age on Drivers’ Estimates of How Well They Performed the Driving Task., line graph y-axis - estimate of driving performance, (4.5-8.0), x-axis - day (1-5), data: "age young", "age middle age", age old age"

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DAY*age; Unweighted Means
Current effect: F(8, 108)=1.9262, p=.06321
Effective hypothesis decomposition