Census advertising also gave problematic messages because it tended to equate religious faith with attendance at places of worship but the two are not necessarily connected. Many Hindus and Buddhists don’t (or can’t) attend the temples but have shrines in their homes where they perform religious duties. Temples have a purpose but ordinary Hindus and Buddhists don’t necessarily have to access them to consider themselves devout believers. Similarly some committed Christians don’t attend church. Recent research (by the Barna Group: findings were published in an article in Christianity Today, June 2017, page 15) conducted on Americans who identify as “Christians” but don’t attend church found that a significant group strongly agree with Christian theology, pray as much as church attenders and score significantly on other faith indicators. I personally know people like this in Australia who are committed to their faith but have not found churches to be helpful (especially in country areas where choice is limited) or believe their time would be better spent helping and serving people than sitting in church meetings. Such people would readily declare themselves as Christians on the census but could not tick any of the current census options: they are not ‘no religion’ but they don’t belong to any of the denominations either.
Furthermore, there are non-Christians who go to church because their families and friends attend or they want to find out what it is about. After some time some commit and become Christians, others decide against and drop out, while some keep coming as non-Christians because they value the pastoral support and fellowship. The situation is much more complicated than whether people attend church or not as some people don’t attend but are committed Christians, while others do attend but are not Christians.
To explore how serious people are about observance of their nominated religion, a follow-up question could ask how often they engage in some faith based activity. E.g. pray, meditate, read scriptures or religious literature, attend a place of worship, or help others out of religious motivation.