Table 5 Internal consistency: Cronbach’s alpha and item-domain correlations for the original and proposed four-factor domains (n = 1015)

Physical domain

0.874

0.885

Item 3

(0.848)

0.711

(0.865)

0.709

Item 4

(0.873)

0.516

(0.885)

0.509

Item 10

(0.857)

0.647

(0.870)

0.670

Item 14^a

-

-

(0.874)

0.628

Item 15

(0.855)

0.666

(0.869)

0.679

Item 16

(0.871)

0.532

(0.882)

0.542

Item 17

(0.837)

0.796

(0.856)

0.803

Item 18

(0.846)

0.720

(0.864)

0.718

Psychological domain

0.803

0.826

Item 5

(0.749)

0.686

(0.789)

0.687

Item 6

(0.761)

0.628

(0.795)

0.644

Item 7

(0.790)

0.477

(0.811)

0.510

Item 8^a

-

-

(0.798)

0.609

Item 9^a

-

-

(0.827)

0.361

Item 11

(0.831)

0.380

(0.840)

0.382

Item 19

(0.737)

0.705

(0.785)

0.686

Item 26

(0.763)

0.602

(0.796)

0.619

Social domain

0.612

0.646

Item 20

(0.376)

0.530

(0.499)

0.544

Item 21

(0.658)

0.342

(0.651)

0.349

Item 22

(0.515)

0.420

(0.545)

0.472

Item 23^a

-

-

(0.612)

0.373

Environmental domain

0.747

0.663

Item 8^a

(0.707)

0.523

-

-

Item 9^a

(0.730)

0.393

-

-

Item 12

(0.714)

0.485

(0.644)

0.403

Item 13

(0.714)

0.507

(0.596)

0.474

Item 14^a

(0.737)

0.381

-

-

Item 23^a

(0.731)

0.384

-

-

Item 24

(0.712)

0.488

(0.560)

0.501

Item 25

(0.719)

0.449

(0.589)

0.454