(Stanovich & West 1997, JEduPsy)

A very simple two item scale :

1. My beliefs would not have been very different if I had been raised by a different set of parents
2. Even if my environment (family, neighborhood, schools) had been different, I probably would have the same religious views

Both items were reversed scored so that higher scores indicated counterfactual thinking. The scores on this scale ranged from 2 to 12.