“Today you are
You, that is truer than true. There is no one alive who is Youer than You.” –
Dr. Seuss
“Now I become
myself.
It’s taken Time, many years and places.
It’s taken Time, many years and places.
I have been dissolved and
shaken,
Worn other people’s faces…”
Worn other people’s faces…”
– May Sarton, “Now I Become Myself”
Recently I’ve enjoyed reading about some research on temperament differences; in this month’s early January blog post hopefully you too might appreciate reading the following as you think on some of your tendencies.
Some research.
They exposed the babies to a carefully chosen set of new experiences and found wildly varying reactions to the new stimuli.
About 20% cried lustily and pumped their arms and legs (Kagan called this group “high-reactive”); about 40 percent stayed quiet and placid, moving their arms or legs occasionally (“low-reactive”); and the remaining 40% fell between these two extremes. Kagan’s prediction: the infants in the high-reactive group were most likely to grow into quieter teenagers, corresponding to introverted qualities such as more reflective or careful.
Follow up testing and interviews happened at ages 2, 4, 7, 11, and as teenagers.
**Some specifics on Kagan’s longitudinal experiment:
At 4 months, infants heard tape-recorded voices and balloons popping, saw colorful mobiles dance before their eyes, and inhaled the scent of alcohol on cotton swabs.
At 2 years, the children met a lady wearing a gas mask and a lab coat, a man dressed in a clown costume, and a radio-controlled robot.
At 11, an unfamiliar adult interviewed them about their personal lives.
Kagan’s team measured heart rates, blood pressures, finger temperatures and other nervous system indicators. They observed the children’s body language and recorded how often and spontaneously they laughed, talked, and smiled. They also interviewed the kids and their parents about what the children were like outside the laboratory.
Cain writes,
“Many of the children turned out exactly as Kagan had expected. The high-reactive infants, the 20% who’d hollered at the mobiles bobbing above their heads, were more likely to have developed serious, careful personalities. The low-reactive infants – the quiet ones – were more likely to have become relaxed and confident types. High and low reactivity tended to correspond, in other words, to introversion and extroversion.”
Intriguing physiology
The more reactive a child’s amygdala, the more jangled he’s likely to feel when confronting something new (the higher his heart rate, more widely dilated his pupils, the tighter his vocal cords, more stress hormone cortisol in his saliva). The sensitivity of the high-reactive’s nervous system seems to be linked not only to noticing scary things, but to noticing in general: they literally use more eye movements than others to compare choices before making a decision (possibly processing the input more, considering all the alternatives).
Our physiologies are different.
-
In
another experiment from 1967, Hans Eysenck placed lemon juice on the tongues of
adults; the introverts, being more aroused by sensory stimuli, were the ones who salivated more. [“The biological basis of personality” Springfield,
IL: Thomas Publishing]

An invitation.
Our differing physiologies affect our way of being in this world: our preferences, our approaches. But it’s not the whole picture. Though studies indicate that personality traits like introversion and extroversion are about around 40-50% heritable, there’s still much room for environmental influence and intentional choice.
In 2013 we can embrace our genetic neuro-chemical ‘nature’ and enjoy that; additionally we can explore ways of being that are other than our inborn temperaments and ‘nurture’ those.
In this new year, which to me invites new beginnings, we GET to step into ways of living that enlarge us rather than diminish us. And so may you be enlarged -- honor your self: both your innate tendencies, and your ability to experiment and expand into ways of being that are not as familiar. May you enjoy this journey of observing and listening to your life.
I thank you, High God—you’re breathtaking!
Body and soul, I am marvelously made! - Psalm 139:14, The
Message paraphrase