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Table 2 Examples of questionnaire items measuring direct Attitude, Subjective Norm, PBC and Intention

From: Use of the Theory of Planned Behaviour to assess factors influencing the identification of students at clinical high-risk for psychosis in 16+ Education

TPB Construct

N Items

Sample Item

Attitude

8

Identifying a student at risk of developing psychosis at school/college would be Harmful/beneficial

Subjective Norms

4

People whose views I value within my profession would disapprove of me identifying students at risk of developing psychosis: Strongly agree – strongly disagree

Perceived Behavioural Control

Self-Efficacy

3

Identifying students at risk of developing psychosis at school/college would be: Difficult- easy

Controllability

2

The decision to identify students at risk of developing psychosis at school/college is beyond my control: Strongly agree – strongly disagree

Intention

Intention

3

I am committed to identifying students at risk of developing psychosis at school/college: Strongly agree – strongly disagree

Self-prediction

1

I expect to identify students at risk of developing psychosis at school/college :Strongly agree – strongly disagree