Category Archives: Thinking

Cognition

Measuring and Increasing Hope to Improve Performance, Health

Hope shifts focus from the present moment to action paths (“pathways”) required to achieve future goals and motivation to follow these goal routes (“agency”).

Some advocates of mindful attention to the present moment question cultivating hope because it focuses on the future instead of the present, despite abundant empirical evidence that hope is positively associated with academic achievement, health outcomes, and more.

Benjamn Franklin

Benjamn Franklin

Buddhist thinkers argued that hope is illusory and prolongs human suffering and even America’s sage, Benjamin Franklin, noted that one who lives on hope will die fasting.

C. RIck Snyder

C. RIck Snyder

In contrast, hope investigator University of Kansas’s Charles “Rick” Snyder substantiated the health and performance benefits of hope and distinguished hope from learned optimism, self-efficacy, and self-esteem.

He developed and validated measures of hope as a trait and as a state, evaluating “pathways” and “agency” beliefs, with collaborators Cheri Harris, John R Anderson, Sharon A. Holleran, Lori M Irving, Sandra T. Sigmon, Lauren Yoshinobu, June Gibb, Charyle Langelle, and Pat Harney.

Snyder and team reported that children and adults across ethnic and gender groups who scored higher in hope demonstrated:

He offered tips for setting goals and enhancing “pathways” and “agency” toward goals, including:

  • Prioritizing self-selected goals
  • Developing multiple paths for each goal
  • Expecting positive outcomes while designing ways to remove potential obstacles.
Pam Omidyar

Pam Omidyar

One practical application of Snyder’s Hope Theory is Re-Mission,video game for cancer patients, developed by HopeLab’s Pam Omidyar, Pam Kato, and UCLA’s Steven Cole.

Pam Kato

Pam Kato

Adolescent patients in remission with acute leukemia, lymphoma, and soft-tissue sarcoma are required to continue daily chemotherapy treatments for up to several years.
Those who miss even 20% of their daily treatments increase their mortality risk by 200%.

Steve Cole

Steve Cole

Kato collaborated with Cole, West Virginia University’s Andrew Bradlyn and Brad Pollock of University of Texas to evaluate video-game interventions to improve young people’s medication adherence.

 They conducted a randomized trial with baseline and 1 month and 3 month assessments at 34 medical centers in the United States, Canada, and Australia.

Brad Pollock

Brad Pollock

Volunteers were 375 males and females between 13 to 29 years old undergoing chemotherapy for at least 4 months.
Participants in the video game tailored to young cancer patient increased adherence to chemotherapy by 50%, and showed increased self-efficacy and knowledge, compared with those who played commercial video games or no video games.

fMRI studies showed that their brains were most active when they played the game instead of observing the game interface.
Most active areas were:

  • Limbic structures including caudate, putamen, and nucleus accumbens, measuring anticipatory excitement before securing a reward
  • Thalamus, “the internet of the brain”
  • Hippocampus, the link between experience and long-term memory

Cole further evaluated Re-Mission and Zamzee, a motivational system to promote physical activity among young people, and now leads HopeLab’s Re-Mission 2 to further amplify positive health behavior and resilience.

-*How do you leverage hope to improve your work performance and health behaviors?

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Your Brain in Court: Cognitive Privacy, US Constitution and Neuroimaging

Amanda Pustilnik

Amanda Pustilnik

Neuroimaging techniques, like fMRI, present constitutional dilemmas for criminal law and criminal procedure, according to University of Maryland‘s Amanda Pustilnik.

These technologies raise questions about “cognitive privacy” in relation to “compelled, self-incriminating speech” under the United States Constitution’s Fifth Amendment and “unreasonable search and seizure” under the Fourth Amendment.

Neuroimagery technologies can measure brain blood flow to determine whether the person is making false statements, and can evaluate whether waveform brain activity indicates a person is familiar with an object like a face or weapon.

In addition, these measurement devices can alter brain processes, such as exposing the brain to powerful magnets, resulting in greater or lesser likelihood of offering truthful statements.

Recent Eighth Amendment challenges to execution by lethal injection and legislative restrictions on abortion based on putative fetal pain are additional examples of legal questions informed by neuroimaging technology.

In these cases, neuroimagery measurements can provide evidence of presence and degree of physical pain.
Previously, this subjective state has not been directly observable until pain neuroimaging procedures were developed and admitted as legal evidence.

Pustilnik proposed “embodied morality” to explain how moral concepts of legal rights and duties are informed by human physicality and constrained by observers’ limitations in empathic identification with the pain sufferer’s experience.

U.S. law applies unrealistic criteria to determining defendants’ mental states for criminal trials in light of neuroscientific evidence, she argued, noting that the law maintains “a false trichotomy” among cognition, emotion, and volition to determine whether a defendant was “capable of moral agency” in committing an illegal act.

This decision is based upon whether the admissible evidence demonstrates that the defendant acted with “purpose,” suggested by planning the act in advance and “knowledge” of the act, typically determined by the defendant’s statements.

Pustilnik cited examples of disorders in which emotional impairments and volitional impairments can modify cognition, including temporal lobe injury, drug addiction, and obsessive-compulsive disorder.

Jean Macchiaroli Eggen

Jean Macchiaroli Eggen

In these situations, the defendant may provide an intelligible “explanation” of the act, yet may not be able to control the behavior, as in obsessive-compulsive disorder or drug addiction.
If the criteria of “intent” and “knowledge” are not fulfilled, a defendant may claim to have acted under “diminished capacity.”

To remedy this disconnect, Pustilnik recommends investigating whether the defendant  “understands the wrongfulness of the act.”

Eric Laury

Eric Laury

Widener University’s Jean Macchiaroli Eggen and Eric Laury of Minor and Brown echo Pustilnik’s observations and propose applying neuroimaging evidence to elements of tort law including knowledge, intent, negligence, and recklessness.

Bernard Baertschi

Bernard Baertschi

Critics of the admissibility of neuroimaging evidence like Bernard Baertschi of University of Geneva raise concerns that neuroimagery evidence injecting a systemic bias that influences jurors’ evaluations of defendants.

To test this claim, Nick Schweitzer and Michael Saks
 of Arizona State University investigated decisions by nearly 1200 volunteers in a mock trial involving psychological, neuropsychological, neuroscientific, and neuroimage expert evidence.
Participants evaluated the defendant’s claim of Not Guilty by Reason of Insanity (NGRI).

Nick Schweitzer

Nick Schweitzer

Volunteers said neuroscience evidence was more persuasive than psychological and anecdotal family history evidence, but there was no significant effect for neuroimaging evidence.

The researchers also asked participants to apply different insanity standards, and neuroscience evidence remained most influential across all standards.

Michael Saks

Michael Saks

Mock jurors who were not provided with a neuroimage said they believed neuroimagery would have been the most helpful evidence in evaluating the defendant, although those who actually received neuroimagery data did not judge this evidence as most valuable.
This is another example of forecasted judgments not correlating with actual judgments.

Neuroimaging skeptic Bernard Baertschi evaluated whether Functional Magnetic Resonance Imaging (fMRI) is more reliable than the polygraph to determine whether a person is providing truthful statements.

He outlined technical, methodological, conceptual and legal issues that obscure the conclusion, including technical definitions of lying and legal concerns about potentially biasing effects of brain imaging evidence on lawsuits.
He concluded, “Mind-reading using fMRI is not ready for use in the courts.”

-*How much weight do you give neuroimaging data in evaluating a person’s behavior, credibility, and motivations?

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Improving Visual Information Processing for Better Performance – Boston Subway Map and More

Transit maps are one example of graphic displays that require the viewer to rapidly process visual information to make quick decisions in often crowded and noisy conditions.

MBTA Map 2013

MBTA Map 2013

Cognitive scientists have studied this type of challenging task load in human performance, but seem not to have been consulted when Boston’s Massachusetts Bay Transportation Authority (MBTA) sponsored a contest to redesign the system map in Spring 2013.

Michael Kvrivishvili

Michael Kvrivishvili

Michael Kvrivishvili, a graphic designer at Moscow’s Art Lebedev Studio, submitted the winning design, which was judged by aesthics and presumed usability.

MIT’s Ruth Rosenholtz, Lavanya Sharan, and Shaiyan Keshvari empirically scrutinized Kvrivishivili’s design using computational modeling to analyze the design’s potential visual clutter and its impact on peripheral vision.

Ruth Rosenholtz

Ruth Rosenholtz

Team Rosenholtz’s model generated “mongrels,” or  alternate representations of Kvrivishvili’s redesigned subway map, that abbreviate and abstract visual elements like color, text, space, line orientation before processing in the visual cortex.

Lavanya Sharan

Lavanya Sharan

Mongrels can account for peripheral vision’s generalized synthesis of information outside direct line-of-sight, which provides an overall impression while sacrificing details to speed information processing.

Shaiyan Keshvari

Shaiyan Keshvari

Their analysis recognized the many positive elements of Kvrivishvili’s design and noted opportunities for design optimization.

Amal Dorai

Amal Dorai

Rosenholtz’s earlier collaboration with MIT colleague Amal Dorai and Rosalind Freeman of Skidmore College evaluated the effectiveness of Dorai’s DesignEye tool to assist designers with this type of human factors optimization.

MBTA 2013 by Behr-Harnot

MBTA 2013 by Behr-Harnot

DesignEye tool enables A/B comparisons between designs and judgments about the quality of a design through simple design visualization.

Design optimization seeks to remedy effects of visual clutter, or excessive and disorganized items that can cause:

  • Crowding
  • Masking
  • Reduced recognition due to occlusion
  • Decreased ability to segment scenes
  • Poorer visual search performance.

 Rosenholtz’s group investigated reliable measures of visual clutter to help designers optimize displays for more effective information processing.

Jeremy Wolfe

Jeremy Wolfe

Among them are Jeremy Wolfe of Harvard’s Guided Search metrics, which measure reaction time (RT), errors, and distinguishing a single item in a crowded visual field provided an alternative to an earlier measure, “set size.”

Yuanzhen Li

Yuanzhen Li

Rosenholtz’s MIT colleagues Yuanzhen Li, Jonathan Mansfield, and Zhenlan Jin evaluated a revised version of her earlier Feature Congestion metric that focused on color and luminance contrast to consider the a new item’s distinctiveness in a crowded display to draw attention.

Michael Mack

Michael Mack

They also assessed Subband Entropy, a measure of visual information in the display, and Edge Density, used by University of Texas’s  Michael Mack and Aude Oliva of MIT to evaluate subjective visual complexity.

Aude Oliva

Aude Oliva

Cognitive science research focused on visual and auditory processing can be applied to optimize human performance through improved usability in many technology and graphic user interfaces.

Eric Johnson

Eric Johnson

Eric Johnson of EMC Computer Systems and a veteran of several Silicon Valley high tech companies, builds on these empirical findings and addresses the challenge of reducing visual clutter with a the ancient practice of feng shui in the workplace.

-*How do you reduce visual clutter in your work environment?

MBTA-Emily Marsh-*What cues do you seek when navigating complex systems like subway systems?

MBTA-Kate Reed

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How the Brain Perceives Time So You Can Manage Time Demands, not Time

Many daily actions like perceiving through the senses, speaking, and walking require accurate timing, often to milliseconds.

These underlying brain mechanisms are crucial to determining causality, decoding temporal patterns, and managing “time demands,” a commitment to complete a task in the future.

Francis Wade

Francis Wade

Francis Wade suggests conducting a systemic diagnostic assessment of current time demand management practices to identify effective approaches, and those that can benefit from fine-tuning.
This leads to a plan that requires external support from people and technology.

But these processes depend on the brain’s accurate time perception.
-*How does the brain perceive time?

David Eagleman

David Eagleman

Baylor College of Medicine’s David M. Eagleman summarized extensive research that answers this question, with collaboration from Peter U. Tse of Dartmouth, UCLA’s Dean Buonomano, Peter Janssen of Katholieke Universiteit Leuven, University of Oxford’s Anna Christina Nobre, and Alex O. Holcombe of Cardiff University.

Peter Tse

Peter Tse

One recent change to the prevailing view that the basal ganglia and cerebellar systems are the brain’s main timekeepers comes from University of New Mexico’s Deborah L. Harrington and Kathleen Y. Haaland.

Kathleen Haaland

Kathleen Haaland

They built on this finding in work with Robert T. Knight of University of California, Davis, investigating the cerebral cortex’s role in perceptual timekeeping by studying task performance of volunteers with focal left (LHD) or right hemisphere (RHD) lesions compared with uninjured participants.

Robert T. Knight

Robert T. Knight

The groups performed a time duration perception task and a frequency perception task, which controlled for non-time processes in both tasks.
Only people with right hemisphere cerebral cortex lesions showed time perception deficits, suggesting that this area also contributes to perceptual timekeeping

People with this damage who accurately perceived time were also able to switch nonspatial attention, implying that time perception and attention switching are linked.
This group had no damage in the premotor and prefrontal cortex, in contrast to those who performed poorly on the time perception.
These results indicate that premotor and prefrontal cortex areas also contribute to accurate time perception.

Richard Ivry

Richard Ivry

Neural systems underlying timing processes may point to remedies for brain injuries that involve motor timing irregularities such as Parkinson’s disease, according to UC Berkeley’s Richard Ivry and Rebecca Spencer of UMass.  

Rebecca Spencer

Rebecca Spencer

Medical University of South Carolina’s Catalin V. Buhusi and
 Warren H. Meck of Duke University suggest that subjective time perception or psychological time is represented by multiple “internal clocks” that judge duration relative to the relevant time context.

Catalin V. Buhusi

Catalin V. Buhusi

Richard Ivry reported that the cerebellum can be considered as operating multiple “internal clocks,” suggesting a physiological basis for Buhusi and Meck’s multi-clock construct.

-*How do you manage time demands for future performance?

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Want to Remember Something You Read? Skip the Underlining – Exploding Learning Technique Myths

-*Were you always told to underline key points in textbooks to reinforce recall for future examinations?

If so, you may have adopted a low-value practice.

John Dunlosky

John Dunlosky

Kent State University’s John Dunlosky and Katherine Rawson collaborated with Duke’s Elizabeth J. Marsh to investigate the validity of frequently recommended learning and recall strategies.

Katherine Rawson

Katherine Rawson

They were joined in the evaluation by University of Wisconsin’s Mitchell Nathan and Daniel Willingham of University of Virginia. 

The team evaluated ten learning techniques:

  • Practice testing
  • Distributed practice
  • Elaborative interrogation
  • Self-explanation
  • Interleaved practice
  • Summarization
  • Highlighting or underlining text
  • Keyword mnemonic
  • Imagery for text learning
  • Rereading 
Elizabeth J. Marsh

Elizabeth J. Marsh

Dunlosky’s team assessed the effectiveness of each approach according to their impact across four domains:

      • Learning conditions, such as solo or group efforts
      • Learner characteristics, including age, ability, and level of prior knowledge
      • Learning materials, ranging from simple to complex
      • Criterion tasks for outcome measures of memory, problem solving, and comprehension and related skills.
Mitchell Nathan

Mitchell Nathan

The team debunked the value of many frequently-recommended practice, but validated several of the more challenging and least enjoyable approaches:

  • Practice testing.  All testing, whether practice testing or high-stakes performance testing, can increase performance and recall, sometimes up to 100% improvement in free recall.
    The most effective practice tests go beyond multiple-choice recognition question to require more detailed, process-oriented inquiries created by the learner.
    Besides its effectiveness, practice testing is also the less time-consuming than other approaches, even the less effective techniques.
Daniel Willingham

Daniel Willingham

Open Source, no-cost Anki software provides flash-card reviews and Walter Pauk of Cornell’s note-taking system enable users to list questions in the column next to notes to speed development of practice tests.

The most powerful learning approach combines both strategies in self-tests over time.

->Moderately helpful learning and retention techniques:

  • Self-explanation documents how to solve problems while providing rationales for choices during learning.
    This approach is nearly twice as time consuming as its similarly-rated peer technique, elaborative interrogation explanation, so has a less effective “Return on Investment” of time and attention.
  • Interleaved practice involves shifting study from one related topic to another, and appears to enhance motor learning and mastering cognitive tasks like mathematical problems up to 43% and augment longer-term skill retention.

->Lowest utility practices:

  • Summarization requires succinctly describing content of every text.
    Like note-taking, it was helpful in preparing for written exams but less useful for recognition tasks like multiple choice tests.
    This method was more useful than the most common techniques of highlighting, underlining and rereading, but still had low efficacy for performance enhancement.
     
  • Highlighting or underlining is the most frequently-used practice but has low value as a performance, learning, and recall practice because it requires little critical thinking beyond reading.
  • Keyword mnemonic advocates linking words to meanings by word sounds and imagery.
    This approach is helpful to trigger short-term recall for people’s names and occupations, scientific terms and foreign words but not English word definitions.
    Keyword practice appears effective in limited instances when the material includes easily memorized keywords, but is less effective than rote learning for long-term recall.
  • Imagery for text learning requires imagining visual images while reading texts.
    This approach is somewhat effective for short texts and when the text is heard rather than read, but much less useful for longer text learning.
  • Rereading was much less effective than other techniques.
    Massed rereading immediately after reading was more effective than outlining and summarizing but spaced rereading was more beneficial than massed rereading, echoing the consistent finding that spaced practice enhances performance and retention.

Dunlosky’s team provided a critical evaluation of frequent learning practices and advocates adopting only those that have proven impact on learning, performance, and retention.
Their analysis suggests that leading practices are:

  • Scheduling practice spaced over time to increase retention and to reinforce skill acquisition
  • Creating practice why questions while reading
  • Writing detailed explanations of the why, how, and what of the topic.

-*How do you enhance your ability to learn, retain information, and perform new skills?

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Body Language Conveys Emotions more Intelligibly than Facial Expressions

Paul Ekman

Paul Ekman

Numerous studies, pioneered by Paul Ekman of University of California, San Francisco, argue that facial expressions provide an accurate, consistent, universal “tell” to underlying emotions.

However, body language more accurately conveys intense emotions than facial Ekman Emotion Stock photoexpressions, according to Hebrew University’s Hillel Aviezer,Yaacov Trope of NYU, and Princeton University’s Alexander Todorov.

Three groups of 15 people judged intense emotions, including pain, pleasure, victory, defeat, grief and joy, portrayed in stock photographs of:

  • facial expressions alone or
  • body language alone or
  • both facial and body expressions.
Hillel Aviezer

Hillel Aviezer

Volunteers assigned more accurate inferences of pictured emotion based on body language, alone or combined with facial expressions, than judgments based on facial context alone.

These results challenge presumption that the face best communicates feeling, yet most participants believe that they rely on facial expression was their most important cue in making inferences.

Yaacov Trope

Yaacov Trope

More than half the volunteers reported that they use facial expression to judge underlying emotions, a bias labeled “illusory facial affect” by Aviezer and team.

Some participants did not view the photos, but heard a description of the content.
The vast majority – 80 percent – said they “would” rely solely on the face when determining the emotion.
The remainder said they would consider the face and body together, yet not one participant indicated that body language alone would be the most important guide to emotion.

Alexander Todorov

Alexander Todorov

Another experiment presented volunteers with altered photos that combined one intense emotional expressed in the face with an opposing “peak” emotion portrayed by the body language.
Volunteers more often judged the emotion associated with the body, although they thought that facial expression was more indicative of underlying emotional experience.

A different condition demonstrated that most participants provided inaccurate judgments of six emotional states portrayed by faces alone:  They judged positive facial expressions as negative more frequently than the actual negative expressions.

Aviezer, Trope, and Todorov argue that facial expressions can be ambiguous and subjective when viewed without the context of body, particularly during intense emotional expressions.

Jamin Halberstadt

Jamin Halberstadt

Jamin Halberstadt of University of Otago explained Team Aviezer’s findings by noting “…bodily context is the expression of emotion…the face reveals a general intensity of feeling but doesn’t communicate what the person is feeling exactly. The body is where the valid information comes from during intense feelings.”

Piotr Winkielman

Piotr Winkielman

His expertise is based on earlier research with University of California at San Diego’s Piotr Winkielman, Paula Niedenthal of University of Wisconsin and University of Clermont-Ferrand’s Nathalie Dalle.
They demonstrated the important role of expectancy in reading, experiencing, and recalling emotions expressed by ambiguous facial photographs.

Paula Niedenthal

Paula Niedenthal

Halberstadt’s team used electromyography (EMG) to evaluate volunteers’ muscle mimicry responses and memory of photos portraying ambiguous faces when associated with emotion labels like “angry” or “happy”, and when the same photos were presented without labels.

Nathalie Dalle

Nathalie Dalle

Participants displayed more EMG activity associated with smiling when they viewed faces labeled “happy” than “angry,” and remembered faces labeled “happy” as happier than faced coded “angry” even though the photographed expressions were ambiguous.

When participants spontaneously mimicked emotions labeled with a specific affect label, they were more likely to remember this emotion.
Since the photos were ambiguous, this recall represents memory bias, based on expecting, then mirroring an expected emotion. 

SPOT-Dept Homeland SecBody language’s greater accuracy than facial expression as a measure of emotion, has important implications for mission critical interrogation and security-screening techniques.

One example is the U.S. Transportation Security Administration’s Screening of Passengers by Observation Techniques (SPOT) program, which was based on Ekman’s facial expression research, but did not account for bodily expression as an indicator of underlying emotion.

Team Aviezer’s findings argue that emotion-screening procedures, as well as everyday workplace interactions, should evaluate both cues from both the body and the face to form most accurate judgments of others’ likely emotional states.  

-*Which cues do you find most helpful in judging other people’s emotional states when interacting with them?

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Buying Happiness: Satisfaction and Material Purchases vs. Experiential “Investments”

-*Does acquiring possessions lead to happiness and satisfaction?

Leaf Van Boven

Leaf Van Boven

“Not so much,” according to University of Colorado’s Leaf Van Boven and Thomas Gilovich of Cornell, who reported that material purchases are less satisfying than experiential purchases.

Thomas Gilovich

Thomas Gilovich

They suggest that experiences make people happier because experiences are:

  • Subject to positive reinterpretation
  • Central to one’s identity
  • More positively valued by others as having “social value.”
Travis Carter

Travis Carter

Gilovich collaborated with Travis Carter of University of Chicago to survey diverse respondents from various demographic groups.
These two cross-sections of the public reported that purchases to acquire a life experience made them happier than “hedonic” or “utilitarian” material purchases.

In Gilovich and Carter’s related lab experiment, volunteers said they had more positive feelings after recalling an experiential purchase than after thinking about a material purchase.

Eunice Kim

Eunice Kim

Participants also expected that experiences would make them happier than material possessions when they adopted a future, “big picture” perspective in contrast to a present-oriented view.
This finding echoes Eunice Kim Cho and team’s decision-making conclusions highlighted in the last blog postReframing Non-Comparable Choices to Make Them Simpler, More Satisfying

Volunteers reported that material purchases are less satisfying because they can lead to focusing on unchosen options, and comparing to other people’s choices, which contributes to doubt and rumination about alternate choices.

Russell Belk

Russell Belk

In addition, most people “maximize” when they make material purchases in an exhaustive, time-consuming process of considering all possible options, then selecting the optimal-seeming alternative.

Marsha Richins

Marsha Richins

In contrast, most people “satisfice” when selecting experiences by setting a minimum standard for decision quality, then selecting the first option.
This more rapid approach typically leads to less regret.

Scott Dawson

Scott Dawson

People who strongly agree with statements like “Some of the most important achievements in life include acquiring material possessions” and “Buying things gives me a lot of pleasure” report lower levels of life satisfaction according to York University’s Russell Belk as well as to University of Missouri’s Marsha Richins and Scott Dawson of Portland State University, in separate studies.

Many people intuitively sense that possessions don’t buy happiness, and these studies confirm that life experiences tend to be more satisfying than material objects.

-*How do you choose among “utilitarian” items, experiences, and “hedonic” possessions when making purchases?

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Symbolic Practice Improves Memorization, Performance

Edward Warburton

Edward Warburton

Expert ballet dancers are skilled performing artists with strong non-verbal communication competencies.
In addition, they are efficient learners of complex three-dimensional sequences, who master cognitively-challenging novel tasks under time constraints and with high expectations of quality performance.

Margaret Wilson

Margaret Wilson

Symbolic practice of these demanding tasks through “marking” can improve performance and reduce the mental strain of learning, mastering, and performing at an expert level, and may be applicable to enhancing other types of performance.

Molly Lynch

Molly Lynch

Former professional ballet dancer Edward Warburton of University of California, Santa Cruz collaborated with UCSC colleague Margaret Wilson  and their counterparts at University of California, Irvine, Molly Lynch and Shannon Cuykendall to investigate the impact of dancers performing an abbreviated version of  choreography during rehearsal by “marking” to conserve energy and to aid recall of complex routines.
One example is marking using a finger rotation to represent a turn.

Shannon Cuykendall

Shannon Cuykendall

Warburton and team compared the quality of performances by dancers who rehearsed by “marking” and by performing the full choreography.

Guided by the “embodied cognitive-load hypothesis,” they reasoned that if marking provided only reduced physical effort, then there should be no difference in the quality of performance between marking and full-effort rehearsals.

In contrast, they found that the performances rehearsed by “marking” were superior, suggesting that marking’s symbolic practice provides cognitive as well as physical benefits.
Marking reduced the cognitive load during rehearsal to allow more effective memory encoding.

David Kirsh

David Kirsh

David Kirsh, University of California San Diego further investigated the assertion that “dance is embodied thought” and that the body is an instrument of cognition by collecting video and interview data as University of Cambridge research fellow Wayne McGregor’s Random Dance company developed a new choreographic sequence.

Wayne McGregor

Wayne McGregor

Kirsh reported that marking was more effective than mental simulation without symbolic movement in enhancing performance.
He noted that marking is “physical thinking,” a simplified representational vehicle for thought, and a form of thinking because it is a:

  • Gestural language for encoding aspects of a target movement
  • Way to prime neural systems involved in the target movement
  • Method to increase precision in mentally projecting aspects of the target movement.

External representations like marking, diagrams, illustrations, instructions reinforce memory through other sensory channels like vision or audition, providing “scaffolding” to enhance recall.

These varied symbolic representations also enhance cognitive power because they:

  • Reduce the “costs” of making inferences and thoughts
  • Are a shared thought “object”
  • Create lasting referents
  • Facilitate repeat representation at other times and places
  • May be more intuitive than cognitive representations
  • Enable information encoding and “projection” to form complex thought structures

Warburton and team suspect that other symbolic rehearsal techniques like whispering, gesturing, and sub-vocalizing could provide similar performance improvements in other areas such as language learning, and are currently investigating these applications.

-*How effective have you found symbolic representations in reducing “cognitive load” and improving performance?

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Biased Time Perception – Mind Time, Clock Time, and Einstein

Albert Einstein

Albert Einstein

Eminent physicist and everyone’s favorite genius, Albert Einstein, suggested that most people have a biased perception of time: “The distinction between past, present and future is an illusion, although a persistent one.”

Molly Harrower

Molly Harrower

More than half a century after Einstein’s groundbreaking theories of relativity a pioneering psychologist   Rorschach expert Molly Harrower illustrated the emotional component of time perception in a poem she wrote during a time of personal transition and loss:

Molly Harrower-Therapy of poetryAccording to Einstein,
The faster we travel
The slower time passes
But the loneliness factor
Is constant

Wilhelm Wundt

Wilhelm Wundt

By the time that Harrower published her The Therapy of Poetry in 1972, experimental psychologists from Wilhelm Wundt to Paul Fraisse and Kurt Lewin measured the psychophysics of time perceptions.

Philip Zimbardo

Philip Zimbardo

Stanford’s Philip Zimbardo with John Boyd extended this work to demonstrate how time perspective – whether past, present or future and tinged with negative or positive emotion – is related to differences in school completion, health behaviors including smoking, drinking, drug use, contraception and driving, coping with homelessness and job search.

John Boyd

John Boyd

Zimbardo became well-known following the disturbing results of the Stanford Prison Experiment, and later began investigating subjective Time Perspective (TP) using a self-report inventory

They identified six time perspectives:

  • Positive Past
  • Negative Past
  • Hedonistic Present
  • Fatalist Present
  • Future
  • Transcendental Future

Philip Zimbardo - Ideal Time PerspectiveZimbardo and Boyd suggested an optimal orientation to time includes a calibrated perspective across the six time orientations.

Citing his own childhood in the South Bronx, Zimbardo argued that schools convert Present Hedonists into Future-oriented time perceivers, and increase opportunities for economic advancement.

Robert Levine

Robert Levine

Robert Levine of California State University, Fresno, differentiated among measured time and subjective time by defining:

  • Clock time
  • Event time
  • Natural time

He asked how people use time in different regions, and the impact of these choices on relationships and health.
Like Zimbardo and Boyd, he advocates developing the ability to move across time orientations and time-related behaviors.

Claudia Hammond

Claudia Hammond

Some of these time perspectives can include subjective biases, including an “elastic” experience of time – sometimes shorter or longer than clock time, according to the BBC’s Claudia Hammond.

She identified several biases in time perception, such as overestimating elapsed time during a frightening experience and shortening of perceived time during a pleasant experience or as one ages.

Douwe Draaisma

Douwe Draaisma

One explanation for the feeling like time accelerates as one gets older is the “proportionality theory“, according to University of Groningen’s Douwe Draaisma.

In this view, a year – 365 days most years – can feel brief when one is 40 years old and has already lived almost 14,600 days.
The same year might feel longer to an 8 year old who had lived almost 2920 days, because it is a larger proportion of experienced time.

Vincent Prohaska

Vincent Prohaska

Another time perception bias is “forward telescoping,” the feeling that past events occurred more recently than they actually did, according to Lehman College’s Vincent Prohaska with colleagues Norman Brown and Robert Belli.
Reverse telescoping” refers to past events of the same elapsed time that seem to have taken place even longer ago.

The Holiday Paradox is another time perception anomaly in which time away from one’s usual routine feeling like it passed both quickly and occurred over a long period of time, perhaps due to the concentration of new experiences and the need to concentrate on processing novel information.

Similarly, “Reminiscence Bump” enables many people to recall experiences between 15 and 25, including prominent news events and cultural trends including music, attire, interests.

University of Chicago’s Norman Bradburn suggested that these distortions may occur because many experiences during memorable or “critical” developmental periods are usually novel, distinctive, personally-involving, and emotionally-tinged.

Because these events were memorable, they may seem to have occurred more recently because people often associate clearer memories with more recent occurrences.
This “inner chronometry” of time tracking can be distorted by emotions, attention, expectations, task demands, and even ambient temperature, according to “the Clarity Hypothesis” to explain these perceptual biases.

-*How do you mitigate time biases?
-*How have you seen these time biases affect and relate to other areas of life?

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