Reliability - religious organisations may over or under estimate attendance, so it's not a reliable measurement.
Validity - questions in surveys focus on Christian beliefs like Heaven and Hell. Hindus and Buddhists would reply 'no', but that doesn't make them atheist.
Some people don't take it seriously - in the 2001 census, 0.7% of respondents claimed being Jedi Knights as their religion.
Explanations - Rationalisation
Disenchantment (Weber):
Moving away from the ideas from the Middle Ages as we realise that we have control over our world and its not all just God.
We can influence the outcome of crops, not God.
Explanations - Rationalisation
A technological worldview (Bruce)
When a plane crashes we blame a technical fault and don't see it as God's punishment.
Floods in Pakistan arn't God's punishment, its global warming.
Religion has lost many of the functions it used to perform, like influence over education or welfare.
Bruce - agrees but adds that religion has become privatised, being confined to the private sphere of the family at home.
Explanations - religious diversity (Berger)
The sacred canopy - no church can now claim an unchallenged monopoly of the truth
Plausibility structure - when there are alternative versions of religion to choose between, people start question any of their plausibility as they cannot all be true
Counter - Berger himself has since said that diversity fuels religious interest, like the growth of evangelicalism in Latin America
Counter - cultural defence and transition (Bruce)
Cultural defence - religion provides a focal point for the defence of identity in a struggle against an external force, like the resurgence of Islam before the 1979 Iran revolution
Cultural transition - religion works as a supporting community for migrants to a new country
Counter - Bruce counters himself by saying that religion only survives when performing functions, not relating supernatural beliefs to individuals
In America - declining church attendance (Bruce)
A stable rate of self-reported attendance of about 40% has masked a decline in actual attendance
Widening gap may be due to it still being socially desirably to attend, so when asked people will still say they go
In America - secularisation form within (Bruce)
Purpose of religion has changed from seeking salvation in Heaven to seeking personal improvement
Churchgoers are now much less strict in their commitment
In 1951, 46% of surveyed evangelicals described going to the moves as morally wrong, in 1982 this was at 0%
In America - religious diversity (Bruce)
Practical realism - acceptance of the view that others are entitled to their own beliefs
Erosion of absolutism - diversity undermines the assumption that our own beliefs are absolute truth