October 2008 Poll - Discussion

The SN-JP Groups and Political Orientations 

The combination of a preference for a particular function of perception (S or N) and a preference for orientation to the outer world (J or P) produces four groups: SJ, SP, NP, and NJ.

From a politics perspective, this grouping provides an interesting contrast between the SJ types and the NP types.  Analysis of responses in the CAPT databank1 for Form G showed that SJs were overrepresented amongst those who reported they were "extremely" or "very" conservative politically. Further, the results from the norming of the Form M of the MBTI® (1998 Manual) suggested the SJ types tended to identify more with traditional political parties (i.e., Republican and Democratic) whereas NP types were overrepresented amongst those who identified themselves as Independents.


The only consistently significant effects for the SJ-NP groups involved two self-perception measures: General and Social.  The primary differences for these two dependent variables seem to be:

  • Self (General): The SJ types scored significantly less liberal than the NP types.
  • Self (Social):  The SJ types scored significantly less liberal than the NP types.
A general trend across the SN-JP groups also may be of interest.  In general, scores on the social self-perception and social attitudes measures were the most liberal; scores on the economic self-perception and economic attitude measures were more moderate.  Scores on the Liberal-Conservative Self-Perception: General fall in the middle.  
Note: Higher scores indicate more Conservative responses.  Scores above 5.0 indicate Conservative orientations and scores below 5.0 indicate Liberal orientations. Results for the analysis can be found here (ANOVA) and here (Kruskal_Wallis). (Note: Higher scores in the ANOVA printout indicate more Conservative responses, except for the Liberal-Conservative Attitudes-Economic where higher scores indicate more Liberal responses.)


Summary of Significance Tests: SN-JP Groups
Liberal-Consevative Measures F-Test   Kruskal_Wallis Test
Self: General p = .000*   p = .007
Self: Social p = .001*   p = .001
Self: Economic p = .080   p = .113
Attitudes: Social p = .213*   p = .032
Attitudes: Economic p = .088   p = .049
*Test assumptions not met      



1  Macdaid, G. P. (1999, February). Facts from the CAPT databank. Paper presented at the Second Biennial Clinical Conference  of the Center for the Applications of Psychological Type, Gainesville, FL.

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