In February 2021, the Bilangan Research Center (BRC) in Jakarta launched the first longitudinal survey of Indonesian Christians using its Spirituality Index. The survey involved 1,137 respondents from 194 cities, representing some 123 denominations. On a 5-point scale, the overall average score on the Spirituality Index was 3.79. Greater Jakarta and Java had the lowest average, at 3.72; Sulawesi was the highest with a Spirituality Index of 3.98. The BRC created a seven-dimensional tool to measure the Spirituality Index. To construct the Spirituality Index, the survey asks 58 questions covering 7 dimensions of spirituality, representing three areas of life, affective (attitude), conative (spiritual practices), and Cognitive (basic belief, doctrine).
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