(Humans are often called 'social animals'). However, the test construct acknowledged the fact that no one is perfectly social or asocial but a mix of both characteristics. Extroversion and introversion are not necessarily either/or qualities, which has been one of the critiques of the Myers-Brigg assessment. In future forms of this extroversion inventory, creating a typology of different types of introversion and extroversion would be useful. For example, some people are very extroverted with friends, but are more socially reserved in a work context. Others are very introverted in the sense that they like to be alone, but can still 'get by' in social environments and perform like extroverts. It is also possible to be very confident speaking in public to large groups of people, but to feel more uncomfortable one-on-one, in personal social contexts.
Additionally, positive forms of sociability -- such as compassion -- and negative forms -- such as conformity with the group at the expense of one's own opinions -- should be measured in a future scale. Some aspects of sociability such as agreeing with others at the expense of one's own opinion can have detrimental social consequences, just like a fear of speaking in public as a result of introversion can have negative personal consequences. Having a list of different items to score for positive and negative qualities of introversion and extroversion would paint a more complete picture of the individual's psyche.
In general, of the bell curve of standard deviation, most responses were clustered at the end of the extroversion scale, with a large percentage of agreement with most of the responses. In the future, it would be necessary to include more 'extreme' responses, indicating more abnormal forms of introversion (to the point of a total lack of voluntary sociability) and extroversion (a difficulty in being alone with one's own thoughts) to generate a bell curve of standard deviation of the results.
References
DISC assessment. (2010). DISC homepage. Retrieved September 17, 2010 at http://www.churchangeldisc.com/definitionofdisc.html
Measuring the big five personality factors. (2010). Department of Psychology. University of Oregon. Retrieved September 17, 2010 at http://www.uoregon.edu/~sanjay/bigfive.html#where
Myers, Isabel Briggs & Peter B. Myers (1995). Gifts differing. Mountain View, CA: Davies-
Black Publishing.
Singh, Archana & Nishi Misra. (2009). Loneliness, depression and sociability in old age.
Industrial Psychiatry Journal, 18 (1): 51-55. Retrieved September 17, 2010 at http://www.industrialpsychiatry.org/article.asp?issn=0972-6748;year=2009;volume=18;issue=1;spage=51;epage=55;aulast=Singh
