Question structure: OPTSQ

What is your religious affiliation or background, whether or not you actively practice that religion? With which religion do you identify, if any? How much you are devoted to this religion is dealt with separately, under religious intensity.

Given in the order of Wikipedia's list of religious populations

• Christianity
• Islam
• Hinduism
• Buddhism
• Atheism
• Chinese folk religion
• Ethnic religion
• African traditional religions
• Sikhism
• Spiritism
• Judaism
• Baháʼí Faith
• Other

As needed, “Other” and some of the named options can be expanded, e.g. into different particular religions, sects or denominations, as dependent questions.