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Table 4 Cronbach’s Alpha Test for Internal Consistency and Sensitivity Analysis

From: Studying driving behavior and risk perception: a road safety perspective in Egypt

Driver Behavior Model

Initial Trial

Final Trial

Variable

Cronbach’s Alpha if Item Deleted

Variable

Cronbach’s Alpha if Item Deleted

(A) Driver Demographics Model

Age

.263

Age

.712

Gender

.350

Driving experience

.597

Driving experience

.182

# of Daily Driving Hours

.526

# of Daily Driving Hours

0.085

# of Daily Trips

.743

Transportation type

.310

Cronbach’s Alpha Value for the Dimension Overall 0.735 > 0.7

Trip Purpose

.364

# of Daily Trips

.265

Who Accompanies You on Trips

.381

Education

.444

Cronbach’s Alpha Value for the Dimension Overall 0.319 < 0.7

(B) Driver Behavior Model

Exceed Speed Limit

.469

Exceed Speed Limit

.630

Overtaking Illegally

.504

Overtaking Illegally

.719

Mobile Phone Use

.488

Mobile Phone Use

.678

Honking Horn / Using High Beam

.481

Honking Horn / Using High Beam

.652

Tailgating

.521

Tailgating

.727

Miss Your Destination Exit’s

.536

Miss Your Destination Exit’s

.748

Driving in Opposite Direction

.503

Driving in The Opposite Direction

.607

Drugs Impact

.574

Keeping a Safe Following Distance

.685

Keeping Safe Following Distance

.461

Using Seatbelt While Driving

.613

Using Seatbelt While Driving

.435

Running Red Lights

.594

Keep Changing Lanes While Driving

.674

Cronbach’s Alpha Value for the Dimension Overall 0.532 < 0.7

Cronbach’s Alpha Value for the Dimension Overall 0.720 > 0.7