Evaluation compares trends of religious non-affiliation in China across multiple national surveys over three decades, suggesting implications for survey design.
Measuring the rate of religious non-affiliation is a difficult task in China, one of the least religious countries in the world, and elsewhere. This study evaluates the trend of religious non-affiliation in China using 22 surveys spanning three decades. We found that two surveys asking beliefs in a mix of gods and religions yielded dramatically lower estimates of non-affiliation compared to the others that measured affiliation explicitly. Among the latter, using a filter question (a yes/no question for religious affiliation) increased the reports of non-affiliation but allowing multiple choices and putting “no religion” toward the end of the lists of response options moderately decreased the reports of non-affiliation. After accounting for question design and demographic differences across the surveys, the decline in religious non-affiliation is reduced and becomes not significant during more recent years.
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Zhang et al. (2022) studied this question.
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