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Table 1 Example items from each psychological construct scale, number of items and response scale, instrument development source(s), and reliability coefficients computed at each assessment point in this study.

From: A test of cognitive mediation in a 12-month physical activity workplace intervention: does it explain behaviour change in women?

Psychological construct

Sample item

Response scale

(number of items)

Construct source(s)

[reference number]

αT1

αT2

αT3

self-efficacy

In the next six months, I am confident that I can participate in regular physical activity:

When I have to do it by myself.

"Not confident at all" to "Extremely confident"

(9 items)

[43, 44]

.93

.93

.94

decisional balance pros

Over the next 6 months:

Physical activity would help reduce tension or manage stress.

"Not at all" to "Very much"

(5 items)

[43, 44]

.85

.83

.85

decisional balance cons

Over the next 6 months:

Physical activity would take too much time.

"Not at all" to "Very much"

(6 items)

[43, 44]

.77

.75

.78

behavioral processes

How often in the past month:

Did you set physical activity goals for yourself that you could reach?

"Never" to "Very often"

(9 items)

[44]

.86

.84

.87

experiential processes

How often in the past month:

Did warnings about health problems cause concern?

"Never" to "Very often"

(10 items)

[44]

.81

.80

.82

severity

I feel:

For me, being physically inactive would be a very bad thing.

"Definitely not" to "Definitely yes"

(3 items)

[45, 46]

.61

.60

.81

vulnerability

I feel:

If I don't get enough physically activity, I would be at risk for serious health problems.

"Definitely not" to "Definitely yes"

(3 items)

[45, 46]

.84

.92

.91

fear

I feel:

Not getting enough physical activity would frighten me because of the possibility of developing serious health problems.

"Definitely not" to "Definitely yes"

(3 items)

[45, 46]

.93

.94

.95

response efficacy

I feel:

For me, physical activity will keep me healthy.

"Definitely not" to "Definitely yes"

(3 items)

[45, 46]

.83

.78

.91

attitude

For me regular physical activity over the next 6 months will be:

"Quite Useful" to "Quite Useless"

Response scale differed for each item (i.e., enjoyable, useful, wise, interesting, relaxing, beneficial) (6 items)

[47, 48]

.78

.82

.80

injunctive norms

Over the next 6 months:

Most people in my social network want me to do regular physical activity.

"Strongly disagree" to "Strongly agree"

(4 items)

[47, 48]

.67

.73

.73

descriptive norms

Over the next 6 months:

Most of my family members will participate in regular physical activity.

"Strongly disagree" to "Strongly agree"

(4 items)

[47, 48]

.55

.61

.63

social support

Over the next 6 months:

People in my social network are likely to help me participate in regular physical activity.

"Strongly disagree" to "Strongly agree"

(3 items)

[47, 48]

.76

.73

.73

perceived behavioral control

Over the next 6 months:

If I were really motivated participating in regular physical activity would be easy.

Response scale differed for each item

(4 items)

[47]

.57

.60

.60