030 | Biological Reactivity and Adventure

I would be remiss if I discussed the topic of adventure without bringing personal psychology into the equation. I know it seems strange. Allow me to explain in Episode 030.
One of the most important, foundational principles in understanding yourself for the purposes of personal development and growth is to understand your biological reactivity - are you inclined to seek out novelty or does doing things outside of your comfort zone make you nervous. Your reactivity can also relate to how and where you get your energy - does a shady spot in a park with a book or jumping out of a plane with a parachute give you more vigor for life? It turns out that introversion and extroversion, similarly, are mostly about this precious resource rather than just ‘do you like people or not?’.
Whereas extroverts tend to actively get energy from interacting with people, introverts tend to use energy to interact with others and must rest and rejuvenate afterwards. But the intricacies of the topic go much deeper - it turns out that your reactivity and introversion or extraversion can be related, and the reasons behind these phenomena come down to our unique psychological wiring.
The work of psychologist Jerome Kagan illustrates this quite eloquently. In Kagan’s famous line of longitudinal studies (perhaps made famous by Susan Cain’s fabulous work: Quiet - a highly recommended read for all human beings), children were followed from birth well into their teenage years, exposed to various novel stimuli along the way. As infants, some 20% of the test subjects had dramatic, noisy reactions to the new stimuli (which could include balloons popping or hearing the recorded voices of strangers), 40% had mild, quiet reactions, and the rest were somewhere in between.
Kagan’s prediction - that the babies with dramatic, noisy reactions would turn into the quiet teenagers of the bunch - came true. Why?
It’s all about the individuals threshold for stimulation. The babies that had dramatic and noisy reactions to the stimuli had very low thresholds for stimulation - they could be called highly reactive - most everything would put them on edge. On the other hand, the babies that had quiet, mellow reactions to the same stimuli had a very high threshold for stimulation - they could handle much more sensory input without going on overload. They could be called low-reactive.
Among those in the field of psychology, the Hebbian version of the Yerkes Dodson Law is well known. Basically, it states that under very low stimulation or arousal levels, an individual will be bored and their performance in whatever task they are completing will be poor. As stimulation and arousal levels go up (whether by an increase in sensory stimuli like popping balloons or an increase in expectation from a boss), performance will begin to go up... to a certain point. After that point is reached, arousal level is too high (the individual is overstimulated or scared) and performance declines.
None of us want to be bored or frightened, so each of us seeks out the perfect level of stimulation to create a flow state of optimal performance and arousal.
Now, if you were one of the babies that was kicking and screaming when you heard the balloon pop because your stimulation threshold is low (meaning you are high reactive), then you can bet that going to a party with tons of new people and loud noises is going to put you in an anxious, overstimulated state. Does that happen to you? It happens to me. We are the high-reactive folks - the introverts - we choose to get into flow by avoiding louder parties and instead by having meaningful conversations with a close friend or going on a quiet run in the forest.
Conversely, if you were one of the babies that was totally fine with new stimuli because you have a high threshold, you are going to choose to find that sweet spot by doing things that increase arousal. That may be attending a big party, or that may be leading a rock climb or skydiving.
See what I’m getting at here?
Now before we go any further, it’s important to note that your unique awesomeness cares nothing as to whether you are low or high reactive, an introvert or an extrovert. As Cain eloquently highlights, each have their powerful strengths, and the world needs both. Take research completed by Professor David Sloan Wilson where he dropped metal cages into a pond filled with pumkinseed fish, whom also have a propensity for finding their appropriate level of stimulation. The bold, low-reactive fish immediately investigated the traps... and caught themselves! On the other hand, other highly reactive fish would go nowhere near the traps. Wilson had to catch them using a complicated netting system from which they could not escape.
Stupid low-reactive extravert fish, right? No. Once Wilson had the fish back in his lab’s tanks, the low-reactive fish responded by immediately adapting to the novelty of the situation, eating the foo...