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Table 3 Internal Consistency and Reliability for Physical Activity Scales

From: Validation of a survey instrument to assess home environments for physical activity and healthy eating in overweight children

Scale from Home Environment Survey (All items developed for this survey based on literature review)

Item Retained in final Home Environment Survey

Cronbach's Alpha

Inter-rater

Intra-Class Coefficients

Test-retest

Intra-Class Coefficients

Physical Activity Availability (Total Scale)

 

N.A.

.88

.99

   Inside playroom

Yes

 

.71

.79

   Exercise room

Yes

 

.83

.84

   Sandbox

Yes

 

.91

.92

   Driveway

Yes

 

.79

.86

   Play area/yard

Yes

 

1.0

.43

   Exercise equipment in TV area

Yes

 

.57

.74

   Space to play in TV area

Yes

 

.56

.71

   Swing Set

Yes

 

.88

.95

   Bicycle

Yes

 

1.00

.84

   Rollerblades/skates

Yes

 

.66

.89

   Skateboard/scooter

Yes

 

.72

.86

   Jump rope

Yes

 

.88

.89

   Hiking shoes

Yes

 

.76

.85

   Running shoes

Yes

 

-.08

.76

   Basketball hoop

Yes

 

.89

.93

   Baseball equipment

Yes

 

.50

.78

   Racket

Yes

 

.89

.84

   Hockey Equipment

Yes

 

.95

.96

   Balls

Yes

 

1.00

.43

   Pedometer

Yes

 

.61

.82

   Winter Sports Equipment

Yes

 

.85

.92

   Other Physically Active Toys

Yes

 

.33

.60

Physical Activity Accessibility (Total Scale)

 

.66

.55

.78

   How many of your child's active toys are in working condition

Yes

 

.26

.72

   How many of your child's active toys are stored in area child uses them

Yes

 

.35

.69

   How many of your child's active toys does child need help getting out

Yes

 

.47

.58

   How many of your child's active toys are stored out of sight

Yes

 

.18

.73

Physical Activity Parental Role Modelling (Total Scale)

 

.68

.30

.85

   Your child sees you being physically active

Yes

 

.22

.78

   Your child sees you doing house/yard work

Yes

 

-.29

.61

   Your child sees you use Physical activity as relaxation

Yes

 

.44

.67

   Your child sees you on the computer

No

 

.22

.86

   Your child sees you watching TV/movies

No

 

.42

.75

   Your child hears you talk about sports or physical activity

Yes

 

.16

.73

   Your child hears you say you were too tired to be physically active

Yes

 

.02

.63

   How often are you physically active with your child

Yes

 

.39

.69

Physical Activity Parental Policies (Total Scale)

 

.79

.24

.80

   How often do you encourage your child to be physical active

Yes

 

.08

.62

   How often do you transport your child for physical activity

Yes

 

.48

.79

   How often do you send your child outside to play

Yes

 

.44

.81

   How often do you give your child physical activity options

Yes

 

.28

.61

   How often do you praise your child for being physically active

Yes

 

-.06

.71