Randomized trial testing 6 forms of a communication summarizing the results of a recent study (about the effects of wearing glasses on reducing covid infection risk). The goal of the trial is to test the effect of different language options to describe uncertainty, and of including the margin of error around the main result.
The study is designed as a proof-of-concept exercise to develop and test a communication meant to summarize the results of a recent randomized trial examining the effects of wearing glasses on the chance of developing COVID-19. The objectives of the randomized trial are: * To compare the effects of three ways of communicating the overall uncertainty of the effects of wearing glasses to reduce the chance of getting COVID and * To compare the effects of including the margin of error (confidence interval) compared to not including it. Researchers will conduct an online, parallel group, individually randomized, pragmatic trial using a 3x2 factorial design, ie, 3 uncertainly language options (GRADE language, colloquial language or none 2 options for the statistical margin of error for the main results (margin of error language or none).
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Enrollment
960
Researchers are testing different forms of information about overall study uncertainty and margin of error around main result
Norwegian Institute of Public Health
Oslo, Norway
understanding of overall uncertainty of benefit (of wearing glasses to reduce the chance of covid infection)
How sure about the effect (4 point scale from very unsure to very sure)
Time frame: within 1 day
understanding of overall uncertainty of harm (of wearing glasses to reduce the chance of covid infection)
How sure about the effect (4 point scale from very unsure to very sure)
Time frame: within 1 day
sufficiency of what is known about the effects of wearing glasses to reduce the chance of covid infection
How sure about the effect (4 point Likert scale)
Time frame: within 1 day
Understanding the margin of error around the benefit of wearing glasses to reduce covid
this is a co-primary outcome which will be used only to compare the 3 versions that include the margin of error to the 3 versions that do not
Time frame: within 1 day
perceived effect of wearing glasses to reduce chance of covid infection
What is the effect on a 5 point scale (lowers a lot, lowers a little, no effect, increase a little, increases a lot
Time frame: within 1 day
how likely is it that wearing glasses reduces the chance of covid infection
4 point scale (very likely, likely, unlikely, very unlikely)
Time frame: within 1 day
intended behavior (if there were a surge in covid in your area, how likely would you be to wear glasses to reduce the chance of covid infection
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4 point scale (very likely, likely, unlikely, very unlikely
Time frame: within 1 day
intended behavior (if there were very few cases of covid in your area, how likely would you be to wear glasses to reduce the chance of covid infection
4 point scale (very likely, likely, unlikely, very unlikely
Time frame: within 1 day
perceptions fo information provided (trustworthy summary?)
4 point Likert scale (strongly agree, agree, disagree, strongly disagree)
Time frame: within 1 day
perceptions fo information provided (sufficient summary?)
4 point Likert scale (strongly agree, agree, disagree, strongly disagree)
Time frame: within 1 day
perceptions fo information provided (clarity of info about benefit)
4 point scale (very clear, clear, unclear, very unclear)
Time frame: within 1 day
perceptions fo information provided (clarity of info about harm)
4 point scale (very clear, clear, unclear, very unclear)
Time frame: within 1 day
perceptions fo information provided (info helpful?)
4 point scale (very helpful, helpful, unhelpful, very unhelpful)
Time frame: within 1 day
perceptions fo information provided (share info with others?)
4 point scale (definitely yes, probably yes, probably no, definitely no)
Time frame: within 1 day
Decisional conflict (hard to make decision)
4 point LIkert scale (strongly agree, agree, disagree, strongly disagree)
Time frame: within 1 day
Decisional conflict (made informed decision)
4 point LIkert scale (strongly agree, agree, disagree, strongly disagree)
Time frame: within 1 day
Decisional conflict (satisfied with decision)
4 point LIkert scale (strongly agree, agree, disagree, strongly disagree)
Time frame: within 1 day