Table A1.
HPM construct and HPD and safety climate items
| Construct | Item | Item text |
| Self-efficacy | 1 | I can tell when I need to wear my hearing protection. |
| 2 | I know how to wear my hearing protection correctly | |
| 3 | I am sure I can ask for help if I have a hard time wearing protection | |
| Susceptibility | 1a | My hearing will not be affected by noise, even if I don't wear hearing protection. |
| 2 | I believe exposure to loud noise can hurt my hearing. | |
| Severity of exposure | 1 | It would be harder for me to understand what people say if I lost some of my hearing. |
| 2a | It wouldn't be a big problem for me if I lost some of my hearing | |
| Benefits | 1 | Preventing hearing loss is very important to me |
| 2 | Wearing hearing protection protects me against hearing loss from noise | |
| 3 | Wearing hearing protection can make it easier for me to hear machinery or talk to coworkers | |
| Barriers | 1a | Wearing hearing protection makes it very hard to talk to people |
| 2a | It takes too much time to use hearing protection. | |
| 3a | Wearing hearing protection is unsafe because it blocks out danger signals. | |
| 4a | Hearing protectors are too uncomfortable for me to wear. | |
| Interpersonal influences | 1 | Other workers at this site wear hearing protection when it's noisy. |
| 2 | Other workers at this site remind me when I need to wear hearing protectors. | |
| 3a | Other workers at this site make fun of me when I wear hearing protection. | |
| Situational influences | 1 | It is easy for me to get hearing protectors at this site. |
| 2 | I can choose from several types of hearing protectors at this site. | |
| 3 | My supervisor thinks I need to wear hearing protection, even when my noise exposure is short. | |
| HPD climate | 1 | My supervisor sets a good example for me when it comes to hearing protection. |
| 2 | I think preventing hearing loss from noise is very important to my supervisor. | |
| Safety climate | 1 | My supervisor frequently checks to see if I am obeying the safety rules. |
| 2 | My supervisor talks with me about how to improve safety. | |
| 3 | My supervisor reminds me to work safely if I am not doing so. | |
| 4 | My supervisor makes sure that I follow all the safety rules. | |
| 5 | My supervisor says a ‘good word’ to me if I pay extra attention to safety. | |
| 6 | My supervisor says I have to wear my protective equipment, even if it is not comfortable. |
a
Reversed questions for scoring.