Studies on the genetic heritability of religiosity seem to show a range of results. Reported levels of religiosity are so high in the US that it might be difficult to tease genetic and cultural factors apart. I'd be more inclined to trust the conclusions of a study on 1974 Dutch families with adolescent and young adult twins:
"Analyses of these data showed that differences between individuals in religious upbringing, in religious affiliation and in participation in church activities are not influenced by genetic factors. The familial resemblance for different aspects of religion is high, but can be explained entirely by environmental influences common to family members. Shared genes do not contribute to familial resemblances in religion. The absence of genetic influences on variation in several dimensions of religion is in contrast to findings of genetic influences on a large number of other traits that were studied in these twin families."
Ignoring extremes of neurological functioning, such as temporal lobe epilepsy, and extremes of psychological functioning, such as personality disorders, I have a hunch about the temperament that might be most likely to adhere to parental patterns of religiosity:
Whereas the Eysenck personality questionnaire is utterly outmoded, the Myers-Briggs Types Inventory is more generally useful with regard to attitudes. The MBTI types individuals according to their self-report of preferential approaches to others and to information:
E/I : extraversion vs introversion – outgoing, energized by social interaction vs introspective and fatigued by too much socializing.
S/N : sensing vs intuitive – satisfaction with the basic information (S) vs a tendency to search for cognitive insights based upon that information (N).
F/T : feeling vs thinking – self-perception of basing of decisions upon 'gut'-level intuitions and feeling (F) vs basing of decisions on logic and rationality (T).
J/P : judging vs perceiving – a preference for closed-ended structure and quick decisions (J) vs a desire to keep options open and to seek more information before making decisions (P).
The four parameters yield 16 different combinations. Though many mental health professionals might treat these combinations as cut-and-dried, there are shades of gray to these parameters – for example, you might consistently base some types of decisions on feelings and other types of decisions on logic.
All MBTI types are equally 'healthy' in a psychological sense. The differences relate to preferred modes of interaction with others and the world. The commonest personality type is ESFJ and the least common is INTP (or is it INTJ? – it's years since I saw the actual statistics).
Because the inventory is administered by fee-charging professionals who purchase it from the developers, it is not available on-line. However, it is not too difficult to quickly guesstimate where you – and your family and friends –would place on the inventory. This page has a chart with roll-over descriptions of each combination.
My hunch is that those who attend church regularly are more likely to be ESFJ than are atheists. ESFJs are socially oriented, satisfied with basic information, feeling-oriented, and structured. I am not saying that all religious people are likely to be ESFJ, just more likely. This is not necessarily true of any theists who might choose to read a blog that sports a large red A – such theists might be atypical.
Reading atheist blogs, I detect a high level of emphasis on logic and analysis, so my hunch is that atheists are more likely to be -NT- (probably -NTP) than -SF-. Obviously, the latter would not necessarily apply to those who become atheists because of traumatic events that damage faith in the deity's benevolence, but it might separate those who turn to religion in the face of life's difficulties from those who do not.
If you want to try an on-line inventory, "True Colors" inventories yield somewhat comparable results here (it's quick). Individuals are a blend of the four colors – rather like a Scottish tartan – on this test. The commonest 'color', corresponding to ESFJ, is gold, while the least frequent type is green.
If I ever figure out how to write the code for polls, I might set one up to do a general survey of MBTI and colors amongst atheists (that's presumably who reads this blog).
In the meantime, it might be interesting if you want to list, as a comment, your a/religious beliefs and your 'type'.
Further to this topic, I found the following information:
A sample of 422 female undergraduate students, attending a university-sector college in Wales specialising in teacher education and liberal arts subjects, completed the Myers-Briggs Type Indicator together with the Troldahl-Powell Dogmatism Scale. The data demonstrated that higher dogmatism scores are most clearly associated with sensing rather than intuition. Higher dogmatism scores are also associated with extraversion rather than introversion, and with judging rather than perceiving. No significant difference in dogmatism scores were found between thinking and feeling.
That is, ESJ types are indeed more likely to be dogmatic. It's interesting that there was no significant difference in dogmatism between self-reports of T versus F.
Most people are likely to overestimate the effectiveness of their thinking, in some areas at the least. One presumes that Sarah Palin fondly imagines that her thought processes are logical. An ill-informed, illogical, or magic-thinking thought is still a thought. So, S combined with T may be selectively ineffectual in promoting critical thinking. Data suggests that superficial, illogical, and emotional thinking are prevalent problem.
Dogmatism, Religion, and Psychological Type, Christopher F. J. Ross, Leslie J. Francis and Charlotte L. Craig, Pastoral Psychology, Volume 53, Number 5 / May, 2005
atheism, cognition, emotion, logic, psychology, personality, religion,