Details of Survey Used to Assess the Target Constructs in Order of Appearance
| Target Construct/Scalea | Items | Answer Format | Reliability (Cronbach’s α) |
|---|---|---|---|
| Main outcome | |||
| Intentions–primary care attendance intentions29,31–35 | I want to visit a GP today/I intend to visit a GP today.b | 5-point scale | 0.94 |
| Potential mediating factors | |||
| Social influence-social norms about primary care attendance31,32,35 | People around me think I need to visit a GP today/approve of me visiting a GP today/think I do not need to visit a GP today.b | 5-point scale | 0.81 |
| Emotions-worry/perceived severity of a health threat36 | Would you say that your child’s symptoms, as described in the illness scenario, suggest that the illness is severe/serious/significant/worrying/normal (given where I live and time of year)?b | 5-point scale | 0.84 |
| Knowledge-information sufficiency37,38 | How much do you think you currently know about the illness as described in the scenario? | Scale of 0 to 100 | … |
| How much knowledge would you need to adequately care for your child showing the described symptoms? You might feel you need the same/more/less, information about the topic. | Scale of 0 to 100 | … | |
| What additional information would you need to adequately care for your child showing the described symptoms? Please describe. | Open-ended question | … | |
| Knowledge/skills/resources-viral illness knowledge and home-care test29 | Thinking about the illness scenario, do you think the cause of your child’s symptoms is a viral infection/bacterial infection? | True/False/I don’t know | … |
| Approximately how long do you think the symptoms of illness (fever/high temperature/sore throat/cough) in your child could last, from start to finish without any antibiotics? | Estimation in days | … | |
| How would you care for your child at home? Strategies and further resources? | Open-ended question | … | |
| Reflective motivation-beliefs about home-care capabilities39 | When my child shows the symptoms described in the scenario, I feel confident about looking after them at home/taking their temperature/seeing if they need more fluids/checking for a rash/seeking advice from online resources/seeking advice or help from family and friends/seeking advice or help from health care professionals. | 5-point scale | 0.81 |
| Knowledge/beliefs-antibiotic use40–42 | Are most cold, cough, and flu illnesses caused by bacteria or viruses? | Multiple choice | … |
| Are antibiotics helpful in treating bacterial infections, viral infection, or both? | Multiple choice | … | |
| How often are antibiotics needed for cough or bronchitis/sore throat/fever/earache/tiredness and aching/vomiting? | 5-point scale | … | |
| If my child does not receive an antibiotic for cold, cough, and flu symptoms, they will be sick for a longer time. | 5-point scale | … | |
| Intervention material feedback | |||
| Clarity43 | Not at all understandable/very understandable | 7-point scale | 0.93 |
| Not at all comprehensible/very comprehensible | |||
| Does not make sense/makes sense | |||
| Confusing arguments/clear arguments | |||
| Unclear information presented/clear information presented | |||
| Credibility43 | Credible information presented/information presented not credibleb | 7-point scale | 0.85 |
| Valid claims/invalid claimsb | |||
| Presented accurate information/did not present accurate informationb | |||
| Cognitive challenge43 | Not intellectually stimulating/intellectually stimulating | 7-point scale | 0.70 |
| Not intellectually engaging/intellectually engaging | |||
| Would make people think/would not make people thinkb | |||
| Not at all thought-provoking/thought-provoking | |||
| Did not really make me think/really made me think | |||
| Emotional arousal44 | Powerful impact/weak impactb | 7-point scale | 0.87 |
| Emotional/unemotionalb | |||
| Involving/uninvolvingb | |||
| Boring/exciting | |||
| Arousing/not arousingb | |||
| Stimulating/not stimulatingb | |||
| Strong visuals/weak visualsb | |||
| Novelty44 | Unique/commonb | 7-point scale | 0.72 |
| Novel/ordinaryb | |||
| Unusual/usualb |