RATING
2 stars
N/A = good but not on the scale
1 star = perspective supplementing
2 stars = perspective influencing
3 stars = perspective altering
SHORT SUMMARY (272 words or less)
My biggest takeaway from this book: the existence of a subconscious mind is not theory, it is a proven fact. And so is its influence on conscious thinking.
There’s this concept in Hinduism of the “lotus dream”–that our world isn’t really the true world, that it’s the result of a divine dream on a cosmic time scale. This book doesn’t get into that at all, but it does discuss the idea that our conscious understanding of the world is a mere model, processed by inputs in our conscious mind and broad influences observed by our subconscious. In a mind blowing example, our brain gets hit with the equivalent of 11 million bits of information every second, and our conscious mind processes only 16 to 50 bits of that. The rest is filtered, categorized, and discarded by our subconscious.
There are a few areas that I want to explore further. One: the actual neuroscience and biology of the human brain. Which regions do what? How do they interact? Two: the impact of categorization. How does the subconscious automatically categorizes sensory information and how is our conscious mind subsequently influenced? Three: the remnant artifact of the subconscious mind. Forgotten experiences do not always disappear; they remain in your cognition long after you forget them. Book example: lullabies sung to babies. You don’t remember them when you grow older, but the emotional impact remains in your subconscious long after your conscious mind forgets the melody. And four: the evolutionary conditions that lead to the biological change in human cognition. Specifically, what happened 50,000 years ago when our brain chemistry changed so suddenly?
LONG SUMMARY:
Started 10/21/2017:
-Wow, you can judge a book by its cover. Because the cover of this book is cool. See image above.
-The introduction to the book states the underlying premise. The subliminal mind or subconscious mind is an actual thing. It’s not something of theory. It has been proven to exist. And it affects behavior of the conscious mind.
-Fun fact: neuro-scientists estimate that 11 million bits of sensory information are sent to the brain every second. But the conscious mind is able to process only 16 to 50 bits of sensory information per second.
-1/3 of the brain’s cerebral processing is dedicated to visual perception. Visual processing occurs on two levels–the conscious and unconscious level.
-The book discusses the concept of “blindsight”: where people who are visually blind (i.e., their conscious mind cannot perceive vision) can never the less process visual information in their unconscious mind.
The book talks about two experiments to explain this. The first experiment was with a patient who had damage to the portions of the left and right side of the brain responsible for processing vision. They took this guy down a hall filled with obstacles, and though he couldn’t see any of them, he was able to avoid all of them. When asked how, he couldn’t explain. Likewise, there is a story about a soldier who had his optical senses damaged by a bullet during war. Though he cannot see, he can still perceive motion when it occurs. The Wikipedia summary of the concept of blindsight describes it as people responding to visual stimuli that they cannot see.
This is an interesting concept, a theme that I imagine will repeat itself throughout the book. The perceived world is a model constructed by our brain from the combination of conscious processing and unconscious processing. As I was listening to this, it made me realize that in some ways, the world we perceive is an illusion or an approximation by our brain of the world that actually exists. And thus, we live in not just one world, but every person sees a different worldly illusion based on their sensory perceptions, conscious and unconscious processing. Kind of trippy to think about. It reminds me of concepts in Vedanta Yoga of the conscious and unconscious mind and perception. I’ll have to find a way to write about linking these concepts.
-A long discussion about memory recall. It’s well known that human memory recall works in the following way: people can remember the thematic and broad details of an event; people almost always fill in the smaller details, often times making them up; people are convinced that these smaller details are real memories.
-Studies show that in police line-ups, between 20 to 25% of the time, a wrong person is identified. Author says that this is an interesting fact — 1 out of 4 or 5 times you’re going to pick the wrong person, and the police often know it because the “wrong” person identified is planted by them. But when someone identifies someone thought to be a suspect, then that evidence is taken as almost iron-clad evidence.
-Human conscious memory is easily tricked into believing memories that are made up. Author says that this gives him a measure of humility. Memories may not always be how you remember.
-Conscious memory recall fades as you age. Author says that it seems as if humans evolved with their conscious memory not not retain it all but rather as a survival mechanism to prioritize what to remember and how to fill the gaps.
-Another interesting point, though your conscious memory fades with time your unconscious still holds on to emotional artifacts. So while you may slowly forget memories of loved ones, their inconscious effect is still with you.
-Discussion of neofrontal cortex and it’s correlation to group size. Author says that you can look at the neofrontal cortex of primates and correlate the size of groups that they associate with. For humans, this is about 150 people.
-Author makes an interesting point about human evolution. That our brain chemistry and structure actually changed about 50,000 years ago even though we’ve been evolving as species in the “homo” genus for 2 million years and that homo sapiens have been around for 200,000 years.
-Theory of mind: the ability that humans have to understand the cognitive thinking, motivations, emotional responses of other humans. This is hugely powerful, as it enables us to build vast networks and organizations beyond our 150 neofrontal cortex limit.
-Three levels of human brain: reptilian brain, limbic system, neocortex
Reptilian brain controls base survival responses, including fear, hunger, fight or flight response.
Limbic system controls emotion, behavior, motivation and long term memory.
Neocortex: governs complex social interactions, language, advanced planning. Our neocortex has grown.
-I kind of zoned in and out to the end, but there was a good discussion on the notion of cognitive categorization. The idea is that the ability to categorize things certainly aided in our survival as a species. But it also negative effects for modern social interactions. As an example, if someone asked you to state what you thought the temperature difference would be on June 30 when compared to June 1, your answer would probably different significantly compared to a time frame defined from June 15 to July 15. Even though the time segment is the same, the fact that we have mentally categorized it in a certain way lends us to think differently about the results.
The big take away is that (1) our subconscious inertia is to put most of our experiences (including people) into categories; (2) that elements within one category are viewed to be very similar, and differences in entries between categories are viewed to be very different; (3) subconscious and conscious cultural cues can influence how we categorize traits per category (or how we even define categories themselves); and (4) actual, experiential interactions can break down preconceived or subconscious characteristics based on categorizing.
So in a real world example, it’s easy to lump people into categories by race, to group members of one race as very similar and people in different races as different, that cultural cues can influence how we define those categories and characteristics, and personal interactions with people can change the rules and associations we have with categories.
It’s important to note that the categorization happens on a subconscious level mostly. So while your conscious mind may think that you do not hold any categorization bias, it is important to understand that your subconscious mind does, and the awareness of that can insulate your conscious mind from being unknowingly influenced by your subconscious category break downs.