Do you think like a polymath? Here's a quick test: Are you more of a rational or experiential/intuitive thinker?
If you cringed as you read the question and thought to yourself "I love constantly shifting between both modes of thought", then you're on the polymath path.
According to psychologist Seymour Epstein's cognitive-experiential self-theory, humans have two parallel but interacting modes of information processing. The rational system is analytic, logical, abstract, and requires justification via logic and evidence. In contrast, the experiential system is holistic, affective, concrete, experienced passively, processes information automatically, and is self-evidently valid (experience alone is enough for belief).
According to Epstein ,
"The two systems have unique disadvantages as well as advantages. Thus, the rational system, although superior to the experiential system in abstract thinking, is inferior in its ability to automatically and effortlessly direct everyday behavior, and the experiential system, although superior in directing everyday behavior is inferior in its ability to think abstractly, to comprehend cause-and-effect relations, to delay gratification, and to plan for the distant future. Since each system has equally important advantages and disadvantages, neither system can be considered superior to the other system."
A large body of research by Epstein and others, including a hot-off-the-press article in the Journal of Personality , supports the importance of harnessing both modes of thought. In Epstein's latest research, an experiential thinking style (System 1), but not a rational thinking style (System 2) was positively associated with performance measures of creativity, humor, aesthetic judgment, and intuition, as well as self-report measures of empathy and social popularity. A rational thinking style was associated some measures of adjustment, and both thinking styles were positively related to personal growth. Interestingly, what people reported about their own thinking style tended to agree with other people’s observations of their thinking style.
Heavily influenced by the important work of Epstein and many other psychologists investigating the dual-process nature of the human mind , I make a distinction between "goal-directed" and "spontaneous" thought in my Dual-Process (DP) Theory of Human Intelligence . According to my theory, both goal-directed (which consumes limited attentional resources) as well as more spontaneous forms of cognition (which are freer of a central executive) are important contributors to nearly every intelligent behavior (in differing degrees depending on the behavior). According to the theory, neither mode of thought is absolutely more important, and neither mode is intelligence. Instead, the key to intelligence is the ability to flexibility switch between mode of thought depending on the task demands.
To see how each mode of thought comes with both advantages and disadvantages, here is a summary of a number of findings over the years showing both the positive and negative attributes associated with each thinking style:
What a terrific list of positive attributes to have! It would be nice to have all of the positive attributes, while minimizing the negative effects of each, no? As Epstein told me in personal communication,
"people who are high in both thinking style are Renaissance people. They have the brains of scientists and the sensibilities of poets. In other words they have the positive features of both thinking styles and do not have their negative features because they are kept under control by the other thinking style."
Being open to both modes of thought isn't just conducive to creativity, but also for facilitating harmonious social relationships. The experiential thinking style is related to lots of important elements of a positive relationship, such as empathy and agreeableness. However, what if you're an experiential thinker but want to form a relationship with someone who is predominantly an analytical thinker? Or vice-versa, what if you're a huge analytical thinker but wish to form a relationship with an experiential thinker? This isn't purely theoretical. For instance, research shows that males, on average, use more of an analytical thinking style than females and females, on average, rely more on experiential thinking to make decisions than males . Of course there is much variation within each gender, but still these gross differences may lead to unnecessary miscommunication between the sexes.
If only everyone, regardless of gender, learned to harness and appreciate both forms of thinking, we could minimize instances where people seem to just be talking past each other. Many, many years of psychological research has shown quite convincingly (to me, at least) that each mode of thought is fundamentally different from the other and when we are in a particular mode of thought we actually perceive everything around us differently and use different information to make decisions. Those who are open to experiencing both analytical thought and experiential thought and are flexible enough to switch between the two depending on the task demands have the greatest chances of not only changing the world for the better, but also forming deep, empathic connections with others.
It's not easy being a polymath these days. Knowledge is being generated and transmitted at light speed. The sheer quantity of knowledge required to become an expert in almost any domain is phenomenal, with barely any time left to master additional domains.
None of this means that you can't think like a polymath though in whatever domain you want to master. The good news is that thinking styles are at least partially separate from actual abilities and correlate with important outcomes. Harnessing more thinking styles only works to your advantage, as long as you have the good sense, flexibility, and openness to know when a particular thinking style is appropriate and when it is likely to get in your way.
So want to be a Renaissance person? First step: start thinking like one.
© 2011 by Scott Barry Kaufman
 Epstein, S., & Norris, P. (in press). An experiential thinking style: Its facets and relations with objective and subjective criterion-measures. Journal of Personality.
 Evans, J., & Frankish, K. (Eds.). In Two Minds: Dual Processes and Beyond. Oxford, NY: Oxford University Press.
 Kaufman, S.B. (2011). Intelligence and the cognitive unconscious. In R.J. Sternberg & S.B. Kaufman (Eds.), The Cambridge Handbook of Intelligence (pp. 442-468). New York, NY: Cambridge University Press. [pdf]
 Marano, H.E. (May 2011). 6 Clues to Character. Psychology Today.