Table 3.

Test-retest reliability in the Boston Metro Area cohort (N = 56)

Sample items	Spearman correlation coefficient (test retest)	p value	Kappa
1. Think it safe to text and drive	0.67112	<.0001	0.52
2. Read text messages when drivingR	0.726	<.0001	0.56
3. When read text messages while drivingR	0.791	<.0001	0.67
4. Read email when drivingR	0.683	<.0001	0.62
5. When read emails while drivingR	0.751	<.0001	0.59
6. View maps or directions on phone while drivingR	0.717	<.0001	0.63
7. Write text messages while drivingW	0.529	<.0001	0.44
8. When write text while drivingW	0.656	<.0001	0.54
9. Write emails when drivingW	0.457	0.0004	0.32
10. When write emails while drivingW	0.515	<.0001	0.34
11. View messages on social media sites while drivingR	0.38	0.0041	0.33
Have been a passenger when others are texting and driving	0.655	<.0001	0.54
Drive under the influence	0.654	<.0001	0.45
Fall asleep when driving	0.376	0.0043	0.30
Use of seatbelt when driving	0.569	<.0001	0.65
Car crashes reported			0.62
Enrolled in programs to reduce texting (e.g.AT&T’s “It Can Wait”)			0.67

R indicates items in the reading subscore (Items 2–6, 11)

W indicates items in the writing subscore (Items 7–10)