Forum question

 On Andersen's line, what are the possible types of relations that sociologists have found to exist between the two concepts, secularization and religiosity? For example as one increases does the other decline, stay the same, or also increase, or what? Or perhaps no relation can be discerned from the available data. In any case, what exactly would count for evidence one way or the other? How do sociologists measure the strength of either concept?