Table 2.

Exploratory factor analysis of beliefs and attitudes measures.

Pattern matrixa	Factor loadings
	1	2	3
In your opinion, how likely is the occurrence of serious side effects after a child got vaccinated?	0.85b
When I read about the possible side effects of vaccination on the websites, I felt worried.	0.82b
When recommending vaccination, physicians do not pay enough attention to the possible side effects.	0.79b
In your opinion, how likely is the occurrence of serious side effects after an adult got vaccinated?	0.77b
When I read what the websites said about the effectiveness of vaccination, I felt worried.	0.76b
Many vaccinations today do more harm than good.	0.75b
Many of the vaccinations recommended today are redundant because the disease is almost extinct.	0.64b
Vaccination often does not fully protect against a disease.	0.52b
Thinking about the 10 minutes you spent searching for information on vaccination: Has the search made you more skeptical about vaccination or has the experience increased your confidence in it?	-0.38
How convincing did you find the websites you looked at during your search?		0.91b
The information on the websites I read was credible.		0.88b
How much do you trust the information about vaccination you found on the websites before?		0.86b
Was the information you found on the websites relevant?		0.73b
How much do you trust Google to provide you with good information?		0.63b
The information about vaccination I have just read on the websites was comprehensible for me.		0.52b
If it weren’t for vaccination, many people would have a shorter lifespan today than they do.			0.86b
People who opt out of vaccination do not only put themselves at risk, but also other people.			0.74b
Vaccination is one of the greatest medical breakthroughs affecting our lives.			0.74b
In my opinion, people should follow the advice to get vaccinated.			0.60b

^aExtraction method: maximum likelihood. Rotation method: Promax with Kaiser normalization.

^bLoading ~ 0.4.