Posts Tagged ‘Daniel Levitin’

The Raising of Children in a Digital Age

October 23, 2018

The title of this post is identical to the title of a letter in “READER COME HOME: The Reading Brain in the Digital World” by Maryanne Wolf. Wolf refers to her chapters as letters. Wolf writes: “The tough questions raised in the previous letters come to roost like chickens on a fence in the raising of our children. They require of us a developmental version of the issues summarized to this point: Will time-consuming, cognitively demanding deep-reading processes atrophy or be gradually lost within a culture whose principle mediums advantage speed, immediacy, high levels of stimulation, multitasking and large amount of information?”

She continues, “Loss, however, in this question implies the existence of a well-formed, fully elaborated circuitry. The reality is that each new reader—that is, each child—must build a wholly new reading circuit. Our children can form a very simple circuit for learning to read and acquire a basic level of decoding, or they can go on to develop highly elaborated reading circuits that add more and more sophisticated intellectual processes over time.”

These not-yet-formed reading circuits present unique challenges and a complex set of questions: First, will the early-developing cognitive components of the reading circuit be altered by digital media before, while, and after children learn to read. What will happen to the development of their attention, memory, and background knowledge—processes known to be be affected in adults by multitasking, rapidity, and distraction? Second, if they are affected, will such changes alter the makeup of the resulting expert reading circuit and/or the motivation to form and sustain deep reading capacities? Finally, what can we do to address the potential negative effects of varied digital media on reading without losing their immensely positive contributions to children and to society?

The digital world grabs children. A 2015 RAND study reported the average amount of time spent by three-to-five year old children on digital devices was four hours a day, with 75% of children from zero to eight years old having access to digital devices. This figure is up from 52% only two years earlier. The use of digital devices increased by 117% in just one year. Our evolutionary reflex, the lovely bias pulls our attention immediately toward anything new. The neuroscientist Daniel Levitin says, “Humans will work just as hard to obtain a novel experience as we will to get a meal or a mate…In multitasking, we unknowingly enter an addiction loop as the brain’s novelty centers become rewarded for processing tiny new stimuli, to the detriment of our prefrontal cortex, which wants to stay on task and gain the rewards of sustained effort attention. We need to train ourselves to go for the long reward and forgo the short one.”

Levitin claims that children can become so accustomed to a continuous stream of competitors for their attention that their brains are for all purposes being bathed in hormones such as cortisol and adrenaline, the hormones more commonly associated with fight, flight, and stress. Children three, or four, or sometimes even two and younger—but they are first passively receiving and then, ever so gradually requiring the levels of stimulation of much older children on a regular basis.

The Stanford University neuroscientist Poldrack and his team has found that some digitally raised youth can multitask if they have been trained sufficiently on one of the tasks. Unfortunately, not enough information is reported to evaluate this claim, other than to leave it open and look to further research to see how these skills can develop.

Wolfe raises legitimate concerns. Much research is needed. But the hope is that damaging effects can be eliminated or minimized. Perhaps even certain types of training with certain types of individuals can be done to minimize the costs of multitasking.

A Field Guide to Lies

January 16, 2017

A Field Guide to Lies is a recent book by Daniel J. Levitin.  The  subtitle is “Critical Thinking in the Information Age.”  This information age is embedded in an age of lies.  Hence Levitin’s book is most timely.  One of Levitin’s previous books is “The Organized Mind.”  This book was reviewed in previous healthy memory blog posts.  To find relevant posts enter “Levitin” into the search box of the healthy memory blog.

The importance of being able to think critically in this age of lies cannot be overestimated.  The first part of  “A Field Guide to Lies”  is titled “Evaluating Numbers.”  Here he discusses the role of plausibility in the assessment of numerical values.  They should be read critically and subjected to sanity checks.  He has a section titled “Fun with Averages” which illustrates how averages can be used to mislead.  Similar tricks can be done with graphs, which he addresses in a section titled “Axis Shenanigans.”  There are hijinks in how numbers are reported that need to be understood if one is to think critically.  Shenanigans and hijinks can occur early on when the numbers are collected.  As virtually all information is probabilistic, probabilities need to be understood.  People need to be able to think probabilistically, and Levitin provides advice as to how to proceed.

Part Two is titled “Evaluating Words.”  It begins by discussing how we know.  Particularly in this age of misinformation and of organizations whose mission it is to mislead, it is important to identify expertise.  It is also important to identify potential motivation behind a given expertise.  A common failure is not to consider alternative explanations, and when they are considered, to undervalue them.  The final section in Part Two is titled Counterknowledge.  HM thinks that this section might have the wrong title.  Although most certainly there is legitimate counterknowledge, today counterknowlede is often a set of well-conceived and well-designed lies.  Very frequently, these lies are outlandish, but yet they are still believed.

Part Three is titled “Evaluating the World.”  The best way of evaluating the world is with science.  Consequently, “How Science Works” is the title of the first section.  The section on logical fallacies is HM’s  favorite.  For many years HM has been annoyed at Dr. Watson’s asking Holmes how did he deduce something or other.  Apparently, Arthur Conan Doyle did not understand what deduction is.  Deduction is drawing a correct conclusion from a set of premises.  But this is not what Holmes did.  Holmes used abduction to solve crimes.  That is, he came up with a conjecture or hypothesis, which he then proved through evidence.

Knowing what you don’t know is another subsection of Evaluating the World.  Remember Rumsfield, “…as we know, there are known knowns;  there are things we know we know.  We also know that there are known unknowns; that is to say we know there are some things that we do not know.  But there are also unknown unknown’s—the ones that we don’t know we don’t know.”  To these statements Levitin adds, “A final class that Secretary Rumsfeld didn’t talk about are incorrect knowns—things  that we think are so, but aren’t.  Believing false claims falls into this category.  One of the biggest causes of bad, even fatal, outcomes is belief in things that are untrue.”     To this, HM would add, that most of what we know is probabilistic, not absolute, and this complicates the thinking processing further.

Bayesian thinking is needed.  Levitin discusses Bayesian thinking in Science and Court, and illustrates this thinking with Four Case Studies.  However, Bayesian thinking is not restricted to just Science and Court.  It should be part of our daily thinking.  Fortunately Levitin dedicates an appendix to the Application of  Bayes’ Rule.

Levitin’s book provides a good introduction to critically thinking.  Unfortunately we live in an era where lying is epidemic and lying has become a business.  The next post is titled “Lies Incorporated.”

© Douglas Griffith and healthymemory.wordpress.com, 2016. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Douglas Griffith and healthymemory.wordpress.com with appropriate and specific direction to the original content.

The 10,000 Hour Rule and the Growth Mindset

January 21, 2016

In “The Future of the Mind:  The Scientific Quest to Understand, Enhance, and Empower the Mind” Dr Kaku reviews the vast amount of research regarding what makes a person a genius or an expert.  He quotes the neurologist Daniel Levitin, “The emerging picture from these studies is that ten thousand hours of practice is required to achieve the level of mastery associated with being a world-class expert—in anything…In study after study, of composers, basketball players, fiction  writers, ice skaters, concert pianists, chess players, master criminals, and what have you, this number comes up again and again.” Malcom Gladwell called this the “10,000” hour rule in his book, “Outliers.”  I need to add that this number of hours alone will not guarantee expertise.  Practice needs to be what is called deliberate practice, which is aimed at improving performance.

So what is meant by 10,000 hours?  Dividing  10,000 hours by the 24 hour day rounds to 417 days.  Of course, no one can study/practice for 24 hours.  An 8 hour day would be about 1250 days or about 3.4 years.  A more likely 4 hour day would yield about 2500 days  or about 6.8 years.

Anyone willing to expend this amount effort needs to enjoy doing whatever it is, and also obviously has a growth mindset.  Charles Darwin once wrote, “I have always maintained that, excepting fools, men did not differ much in intellect, only in zeal and hard work.”

Although a growth mindset is key to a healthy memory,  this growth need not be targeted at a single area.  The growth can be dispersed over many interests.  However, becoming expert at a particular skill or in a particular area does require sacrifices.  We mere mortals are limited in terms of both time and energy.

© Douglas Griffith and healthymemory.wordpress.com, 2015. Unauthorized use and/or duplication of this material without express and written permission from this blog’s author and/or owner is strictly prohibited. Excerpts and links may be used, provided that full and clear credit is given to Douglas Griffith and healthymemory.wordpress.com with appropriate and specific direction to the original content.