Beyond Zoom Fatigue: Re-energize Yourself and Improve Learning

Erik Peper and Amber Yang

“Instead of zoning out and being on my phone half the time. I felt more engaged in the class and like I was actually learning something.”    -21 year old college student

Before the pandemic, roughly, two-thirds of all social interactions were face-to-face—and when the shelter-in-place order hit our communities, we were all faced with the task of learning how to engage virtually. The majority of students reported that taking online classes instead of in person classes is (“taking online classes” is singular) significantly more challenging.  It is easier to be distracted and multitask online—for example, looking at Instagram, Facebook, Twitter, TikTok, texting, surfing the internet,  responding to notifications, listening to music, or drifting to sleep. Hours of watching TV and/or streaming videos have conditioned many people to sit and take in information passively, which discourages them from actively responding or initiating. The information is rapidly forgotten when the next screen image or advertisement appears. Effectively engaging on Zoom requires a shift from passively watching and listening to being an active, creative participant.

Another barrier to virtual engagement is that communicating online does not engage all senses. A considerable amount of our communication is nonverbal—sounds, movement, visuals, physical structures, touch, and body language. Without these sensory cues, it can be difficult to feel socially connected on Zoom, to sustain attention and to focus. Another challenge to virtual learning is that without the normal environment of a classroom, many students across the country are forced to learn in emotionally and/or physically challenging environments, which gets in the way of maintaining attention and focus. The Center for Disease Prevention (CDC) reported that anxiety disorder and depressive disorder have increased considerably in the United States during the COVID-19 pandemic (Leeb et al, 2020).  Social isolation, stay-at-home orders, and coping with COVID-19 are contributing factors affecting mental health especially for minority and ethnic youth. Stress, anxiety and depression can greatly affect students’ ability to learn and focus.

The task of teaching has also become more stressful since many students are not visible or appear still-faced and non-responsive.  Teaching to non-responsive faces is significantly more stressful since the presenter receives no social feedback.  The absence of social feedback during communication is extremely stressful. It is the basis of Trier Social stress test in which a person presents for five minutes to a group of judges who provide no facial or verbal feedback (Allen et al, 2016; Peper, 2020).

The Zoom experience especially in a large class can be a no win situation for the presenter and the viewer. To help resolve this challenge, we explored a strategy to increase student engagement and reduce social stress of the teacher.  In this exploration, we asked students to rate their subjective energy level, attention and involvement during a Zoom conducted class. For the next Zoom class, they were asked to respond frequently with facial and body expressions to the presentation. For example, students would expressively shake their head no or yes and/or use facial expressions to signal to the teacher that they were engaged and listening. Other strategies included giving thumbs up or thumbs down, making sounds, and changing your body posture as a response to the presentation. Watch the superb non-judgmental instructions adapted for high school students by Amber Yang.

When college students purposely implement animated facial and body responses during a Zoom class, they report a significant increase in energy level, attention and involvement (p<0.002) as compared just attending normally in class as shown in Figure 1.

Figure 1.  Change in subjective energy, attention and involvement when the students significantly increase their facial and body animation by 108% as compared to their normal non-expressive class behavior (from: Peper, Martin, Rosegard, & Harvey, unpublished).

 “I never realized how my expressions affected my attention. Class was much more fun”        -22 year old college student

“I can see how paying attention and participation play a large role in learning material. After trying to give positive facial and body feedback I felt more focused and I was taking better notes and felt I was understanding the material a bit better.”       –28 year old medical student

These quotes are a few of the representative reports by more than 80% of the students who observed that being animated and responsive helped them to stay present and learn much more easily and improve retention of the materials. For a few students, it was challenging to be animated as they felt shy, self-conscious and silly and kept wondering what other students would think of them.

Having students compare two different ways of being in Zoom class is a useful assignment since it allows students to discover that being animated and responsive with facial/body expression improves learning.  So often we forget how our body impacts our thoughts and emotions. For example, when students are asked to sit in a slouched position, they reported that it was much easier to recall hopeless, helpless, powerless and defeated memories and more difficult to perform mental math in the slouched position. While in the upright position it was easier to access positive empowering memories and easier to perform mental math (Peper et al, 2017; Peper et al, 2018). 

Experience how body posture affects emotional recall and feeling (adapted from Alda, 2018).

1) Stand up and configure your body in a position that signals defeat, hopelessness and depression (slouching with the head down). While holding this position, recall a memory of hopelessness and defeat. Notice any negative emotions that arise from this.

2) Shift and configure your body into a position that signals joy, happiness and success (standing tall, looking up with a smile).  While holding this position, recall a memory of joy and happiness. Notice any positive emotions that arise from this.

3) Configure your body in a position that signals defeat, hopelessness and depression (slouching with the head down). While holding this position, recall a joy, happiness and success. Do not change your body position.  End this configuration after holding it for a little while.

4) Shift and your body in a position that signals joy, happiness and success (standing tall, looking up with a smile).  While holding this position, recall a memory of hopelessness and defeat. Do not change your body position.  End this configuration after holding it for a little while.

When body posture and expression are congruent with the evoked emotion, it is almost always easier to experience the emotions. On the other hand, when the body posture expression is the opposite of the evoked emotion (e.g., the body in a positive empowered stance while recalling hopeless defeated memories) it is much more difficult to evoke and experience the emotion. This same concept applies to learning.  When slouching and lying on the bed while in a Zoom class, it is much more difficult to stay present and not drift off.  On the other hand, when sitting erect and upright and actively responding to the presentation, the body presence/posture invites the brain to focus for optimized learning.

Conclusion

In a Zoom environment, it is easy to slouch, drift away, and become non-responsive—which can exacerbate zoom fatigue symptoms and also decrease our capacity to learn, focus, and feel connected with the people around us on Zoom. Actively participating in class by sitting up, maintaining an empowered posture, and using nonverbal facial and body expressions to communicate helps us take charge of optimizing our learning experience as we face the day-to-day challenges of the pandemic and beyond.

I noticed I was able to retain information better as well as enjoy the class more when I used facial-body responses. At times, where I would try to wonder off into bliss, I would catch myself and try to actively engage in the class with body movements even if there is no discussion. Animated face/body was a better learning experience.          –21-year old college student. 

References

Alda, A. (2018). If I Understood You, Would I Have This Look on My Face?: My Adventures in the Art and Science of Relating and Communicating. New York: Random House.

Allen, A. P., Kennedy, P. J., Dockray, S., Cryan, J. F., Dinan, T. G., & Clarke, G. (2016). The Trier Social Stress Test: Principles and practice. Neurobiology of stress, 6, 113–126.

Leeb, R.T., Bitsko, R,H,, Radhakrishnan. L., Martinez, P., Njai, R., & Holland, K.M. (2020). Mental Health–Related Emergency Department Visits Among Children Aged <18 Years During the COVID-19 Pandemic — United States, January 1–October 17, 2020. MMWR Morb Mortal Wkly Rep, 69,1675–

Peper, E. (October 13, 2020). Breaking the social bond: the immobilized face.  The Peper Perspective.

Peper, E., Harvey, R., Mason, L., & Lin, I.-M. (2018). Do better in math: How your body posture may change stereotype threat response. NeuroRegulation, 5(2), 67–74.

Peper, E., Lin, I-M., Harvey, R., & Perez, J. (2017). How posture affects memory recall and mood.  Biofeedback.45 (2), 36-41.

Peper, E., Martin, M., Rosengard, E., & Harvey, R. (unpublished). Be present and productive–Take charge of screen lethargy and zoom exhaustion


Breaking the social bond: The immobilized face

After teaching for hours on Zoom, I feel exhausted. Zoom fatigue is real.

While talking to a close friend, all of a sudden his attention shifted from listening to me to looking his cellphone as he heard a notification.  At that moment, I felt slightly left and hurt.

Students report that when they are are talking with friends and their friends look at their cellphone or responds to a notification they feel hurt and slightly dismissed. Even though most experience this break in social bonding, almost all do this with others. The looking at the phone is the conditioned stimuli to which we automatically respond when we feel it vibrate or even when we see it.  We respond by shifting our attention to the phone in the same way that Pavlov’s dogs would salivate when they heard the bell that was conditioned with the food.  On the average we now check our phones 96 times a day—that is once every 10 minutes and an increase of 20% as compared to two years ago (Asurion Research, 2019).

To feel SAFE is essential for growth and developing intimacy.  We interpret being safe through the process of neuroception.  Without conscious awareness our brain processes facial cues to identify if the interactions are safe or not safe.  If safe, vigilance and sympathetic arousal is reduced and better communication is supported (Porges, 2017). On the other hand, if a person’s face is flat and non-responsive during a conversation, it may signal danger and trigger fight/flight in the person seeing the non-reactive face. This unconscious stress reaction to a non-responsive face is the basis of the Tier Social Stress Test.  In this stress assessment, participants are asked to give a presentation and are also given an unexpected mental arithmetic test  in front of an panel of judges who do not provide any feedback or encouragement (Allen et al, 2016)). Not receiving social feedback while communicating is one of the most stressful events –it is being stuck in social quicksand as there are no cues to know what is going on.

We wonder if the absence of confirmative facial feedback is a component of Zoom fatigue when presenting to a larger group in which you see multiple faces as small postage stamps or no face at all.  In those cases, the screen does not provide enough covert facial and body feedback to know what is going on as you are communicating.  The audience non-responsive faces may covertly signal DANGER, The decrease visual and auditory signals is compounded by:

  • Technical issues due to signal bandwidth and microphone (freezing of the screen, pixilation of the display, breakup in sound, warbling of voice, etc.).
  • Viewers sitting still and facially immobilized without reacting as they watch and listen.
  • Time delay caused by participants turning on the microphone before speaking may be negatively evaluated by the listener (Roberts, Margutti, & Takano, 2011).
  • Non-recognizable faces because the face and upper torso are not illuminated and blacked out by backlighting or glare.
  • Lack of eye and face contact because the speaker or participant is looking at the screen and their camera is to the side, below or above their face.
  • Multi-tasking by the speaker who simultaneously presents and monitors and controls the Zoom controls such as chat or screen share.

In normal communication, nonverbal components comprise a significant part of the communication (Lapakko, 2007; Kendon, 2004).  We use many nonverbal cues (lip, eye, face, arm, trunk, leg and breathing movements) as well as olfactory cues to understand the message. In most group zoom meeting we only see the face and shoulders instead of an integrated somatic body response in a three-dimensional space as we look near and far. On the other hand, in front of the computer, we tend to sit immobilized and solely look at a two-dimensional screen at a fixed distance.  As we look at the screen we may not process the evolutionary nonverbal communication patterns that indicate safety. Similarly, when child does not receive feedback as it reaches out, it often becomes more demanding or withdraws as the social bond is disconnected.  

Parents captured by their cell phone while their child is demanding attention. 
From: https://live.staticflickr.com/3724/11180721716_1baa040430_b.jpg

Communication is an interactive process that supports growth and development. When the child or a person reaches out and there is no response. The detrimental effect of interrupting facial responsiveness is demonstrated by the research of University of Massachusetts’s Distinguished University Professor of Psychology Edward Tronick (Goldman, 2010; Tronick et al, 1975).

How to maintain build social bonds

Recognize that being distracted by cellphone notifications and not being present are emotional bond breakers, thus implement behaviors that build social connections.

Zoom recommendations

  • Arrange your camera so that your face and upper torso is very visible, there is no backlight and glare, and you are looking straight at the camera.
  • Provide dynamic visual feedback by exaggerating your responses (nod your head for agreement or shake your head no for disagreement).
  • When presenting, have a collaborator monitor Chat and if possible have them shift back and forth between share screen and speaker view so that the speaker can focus on the presentation.
  • Use a separate microphone to improve sound.
  • If the screen freezes or the sound warbles often an indication of insufficient bandwidth, turn off the video to improve the sound quality.

Social bonding recommendations

  • Share with your friends that you feel dismissed when they interrupt your conversation to check their cell phone.
  • When meeting friends, turn off the cell phone or put them away in another room so not to be distracted.
  • Schedule digital free time with your children.
  • During meal times, turn off cell phones or put them in another room.
  • Attend to the baby or child instead of your cellphone screen.

For a detailed perspective how technology impacts our lives and what you can do about it, see our book, TechStress-How Technology is Hijacking our Lives, Strategies for Coping and Pragmatic Ergonomics (Peper, Harvey, & Faass, 2020).  Available from: https://www.penguinrandomhouse.com/books/232119/tech-stress-by-erik-peper-phd/ 

References:

Allen, A. P., Kennedy, P. J., Dockray, S., Cryan, J. F., Dinan, T. G., & Clarke, G. (2016). The Trier Social Stress Test: Principles and practice. Neurobiology of stress6, 113–126.

Asurion Research (November 19, 2019).Americans Check Their Phones 96 Times a Day.

Goldman, J.G. (2010). Ed Tronick and the “Still Face Experiment.” Scientific American, Oct 18.

Kendon, A. (2004). Gesture: Visible Action as Utterance. Cambridge, England: Cambridge University Press  ISBN-13 : 978-0521835251 

Lapakko, D. (2007). Communication is 93% Nonverbal: An Urban Legend Proliferates. Communication and Theater Association of Minnesota Journal, 34, 7-19.

Peper, E., Harvey, R., & Faass, N. (2020). TechStress-How Technology is Hijacking our Lives, Strategies for Coping and Pragmatic Ergonomics.  Berkeley, CA: North Atlantic Books. ISBN-13: 978-1583947685 

Porges, S.W. (2017). The pocket guide to the polyvagal theory: The transformative power of feeling safe. New York: W. W. Norton & Co. ISBN-13 : 978-0393707878 

Roberts F., Margutti P., Takano S. (2011). Judgments concerning the valence of inter-turn silence across speakers of American English, Italian, and Japanese. Discourse Process. 48 331–354. 10.1080/0163853X.2011.558002 

Tronick, E., Adamson, L.B., Als, H., & Brazelton, T.B. (1975, April). Infant emotions in normal and pertubated interactions. Paper presented at the biennial meeting of the Society for Research in Child Development, Denver, CO.

 

 

 

 


Resolve Eyestrain and Screen Fatigue

Adapted from: Peper, E., Harvey, R. & Faass, N. (2020). TechStress: How Technology is Hijacking Our Lives, Strategies for Coping, and Pragmatic Ergonomics. Berkeley: North Atlantic Books.

eyes
Forty percent of adults and eighty percent of teenagers report experiencing significant visual symptoms (eyestrain, blurry vision, dry eyes, headaches, and exhaustion) during and immediately after viewing electronic displays. These ‘technology-associated overuse’ symptoms are often labeled as digital eyestrain or computer vision syndrome (Rosenfield, 2016; Randolph & Cohn, 2017). Even our distant vision may be affected— after working in front of a screen for hours, the world looks blurry. At the same time, we may experience an increase in neck, shoulders and back discomfort. These symptoms increase as we spend more hours looking at computer screens, laptops, tablets, e-readers, gaming consoles, and cellphones for work, taking online classes, watching streaming videos for entertainment, and keeping connected with friends and family (Borhany et al, 2018; Turgut, 2018; Jensen et al, 2002).

Eye, head, neck, shoulder and back discomfort are partly the result of sitting too long in the same position and attending to the screen without taking short physical and vision breaks, moving our bodies and looking at far objects every 20 minutes or so.  The obvious question is, “Why do we stare at and are captured by, the screen?”  Two answers are typical: (1) we like the content of what is on the screen; and, (2) we feel compelled to watch the rapidly changing visual scenes.

From an evolutionary perspective, our sense of vision (and hearing) evolved to identify predators who were hunting us, or to search for prey so we could have a nice meal.  Attending to fast moving visual changes is linked to our survival.  We are unaware that our adaptive behaviors of attending to a visual or auditory signals activate the same physiological response patterns that were once successful for humans to survive–evading  predictors,  identifying food, and discriminating between friend or foe. The large and small screen (and speakers) with their attention grabbing content and notifications have become an evolutionary trap that may lead to a reduction in health and fitness (Peper, Harvey & Faass, 2020).

Near vision stress

To be able to see the screen, the eyes need to converge and accommodate. To converge,  the extraocular muscles of the eyes tighten; to focus (accomodation), the ciliary muscle around the lens tighten to increase the curvature of the lens.  This muscle tension is held constant as long as we look at the screen. Overuse of these muscles results is near vision stress that contributes to computer vision syndrome, development of myopia in younger people, and other technology-associated overuse syndromes (Sherwin et al, 2012; Enthoven et al, 2020).

Continually overworking the visual muscles related to convergences increases tension and contributes to eyestrain. While looking at the screen, the eye muscles seldom have the chance to relax.  To function effectively, muscles need to relax /regenerate after momentary tightening. For the eye muscles to relax, they need to look at the far distance– preferably objects green in color. As stated earlier, the process of  distant vision occurs by relaxing the extraocular muscles to allow the eyes to diverge along with relaxing the ciliary muscle to allow the lens to flatten.  In our digital age, where screen of all sizes are ubiquitous, distant vision is often limited to the nearby walls behind a screen or desk which results in keeping the focus on nearby objects and  maintaining muscular tension in the eyes.

As we evolved, we continuously alternated between between looking at the far distance and nearby areas for food sources as well as signals indicating danger. If we did not look close and far, we would not know if a predator was ready to attack us.  Today we tend to be captured by the screens.  Arguably, all media content is designed to capture our attention such as data entry tasks required for employment, streaming videos for entertainment, reading and answering emails, playing e-games, responding to text notifications, looking at Instagram and Snapchat photos and Tiktok videos, scanning Tweets and using social media accounts such as Facebook. We are unaware of the symptoms of visual stress until we experience symptoms. To illustrate the physiological process that covertly occurs during convergence and accommodation, do the following exercise.

Sit comfortably and lift your right knee a few inches up so that the foot is an inch above the floor.  Keep holding it in this position for a minute…. Now let go and relax your leg.

A minute might have seemed like  a very long time and you may have started to feel some discomfort in the muscles of your hip.  Most likely, you observed that when you held your knee up, you most likely held your breath and tightened your neck and back. Moreover, to do this for more than a few minutes would be very challenging. 

Lift your knee up again and notice the automatic patterns that are happening in your body. 

For muscles to regenerate they need momentary relaxation which allows blood flow and lymph flow to occur. By alternately tensing and relaxing muscles, they can work more easily for longer periods of time without experiencing fatigue and discomfort (e.g., we can hike for hours but can only lift our knee for a few minutes).

Solutions to relax the eyes and reduce eye strain 

  • Reestablish the healthy evolutionary pattern of alternately looking at far and near distances to reduce eyestrain, such as:
    • Look out through a window at a distant tree for a moment after reading an email or clicking link.
    • Look up and at the far distance each time you have finished reading a page or turn the page over.
  • Rest and regenerate your eyes with palming. While sitting upright, place a pillow or other supports under our elbows so that your hands can cover your closed eyes without tensing the neck and shoulders.palming
    • Cup the hands so that there is no pressure on your eyeballs, allow the base of the hands to touch the cheeks while the fingers are interlaced and resting your forehead.
    • Close your eyes, imagine seeing black. Breathe slowly and diaphragmatically while feeling the warmth of the palm soothing the eyes. Feel your shoulders, head and eyes relaxing. Palm for 5 minutes while breathing at about six breaths per minute through your nose.  Then stretch and go back to work.

Palming is one of the many practices that improves vision. For a comprehensive perspective and pragmatic exercises to reduce eye strain, maintain and improve vision, see the superb book by Meir Schneider, PhD., L.M.T., Vision for Life, Revised Edition: Ten Steps to Natural Eyesight Improvement.

Increased sympathetic arousal

Seeing the changing stimuli on the screen evokes visual attention and increases sympathetic arousal. In addition, many people automatically hold their breath when they see novel visual or hear auditory signals; since, they trigger a defense or orienting response. At the same time, without awareness,  we may tighten our neck and shoulder  muscles as we bring our nose literally to the screen.  As we attend and concentrate to see what is on the screen, our blinking rate decreases significantly.  From an evolutionary perspective, an unexpected movement in the periphery could be a snake, a predator, a friend or foe and the body responds by getting ready: freeze, fight or flight. We still react the same survival responses. Some of the physiological reactions that occur include:

  • Breath holding or shallow breathing. These often occur the moment we receive a text notification, begin concentrating and respond to the messages, or start typing or mousing.  Without awareness,  we activate the freeze, flight and fight response. By breath holding or shallow breathing, we reduce or limit our body movements, effectively becoming a non-moving object that is more difficult to see by many animal predators.  In addition, during breath holding, hearing become more acute because breathing noises are effectively reduced or eliminated.
  • Inhibition of blinking. When we blink it is another movement signal that in earlier times could give away our position. In addition, the moment we blink we become temporarily blind and cannot see what the predator could be doing next.
  • Increased neck, shoulder and back tension. The body is getting ready for a defensive fight or avoidance flight.

Experience some of these automatic physiological responses described above by doing the following two exercises.

Eye movement neck connection:  While sitting up and looking at the screen, place your fingers on the back of the neck on either side of the cervical spine just below the junction where the spine meets the skull.

neck

Feel the muscles of neck along the spine where they are attaching to the skull. Now quickly look to the extreme right and then to the extreme left with your eyes. Repeat looking back and forth with the eyes two or three times.

What did you observe?  Most likely, when you looked to the extreme right, you could feel the right neck muscles slightly tightening and when you looked the extreme left, the left neck muscles slightly tightening.  In addition, you may have held your breath when you looked back and forth.

Focus and neck connection:  While sitting up and looking at the screen, place your fingers on the back of the neck as you did before. Now focus intently on the smallest size print or graphic details on the screen.  Really focus and concentrate on it and look at all the details.

What did you observe?  Most likely, when you focused on the text, you brought your head slightly forward and closer to the screen, felt your neck muscles tighten,  and possibly held your breath or started to breathe shallowly.

As you concentrated, the automatic increase in arousal, along with the neck and shoulder tension and reduced blinking contributes to developing discomfort. This can become more pronounced after looking at screens to detailed figures, numerical data, characters and small images for hours (Peper, Harvey & Tylova, 2006; Peper & Harvey, 2008; Waderich et al, 2013).

Staying alert, scanning  and reacting to the images on a computer screen or notifications from text messages, can become exhausting. in the past, we scanned the landscape, looking for information that will help us survive (predators, food sources, friend or foe)  however today, we react to the changing visual stimuli on the screen. The computer display and notifications have become evolutionary traps since they evoke these previously adaptive response patterns that allowed us to survive.

The response patterns occur mostly without awareness until we experience discomfort. Fortunately, we  can become aware of our body’s reactions with physiological monitoring which makes the invisible visible as shown in the figure below (Peper, Harvey & Faass, 2020).

biofeedback

Representative physiological patterns that occur when working at a computer, laptop, tablet or cellphone are unnecessary neck and shoulder tension, shallow rapid breathing, and an increase in heart rate during data entry. Even when the person is resting their hands on the keyboard, forearm muscle tension, breathing and heart rate increased.

Moreover, muscle tension in the neck and shoulder region also increased, even when those muscles were not needed for data entry task.  Unfortunately, this unnecessary tension and shallow breathing contributes to exhaustion and discomfort (Peper, Harvey & Faass, 2020).

With biofeedback training, the person can learn to become aware and control these dysfunctional patterns and prevent discomfort (Peper & Gibney, 2006; Peper et, 2003).  However, without access to biofeedback monitoring, assume that you respond similarly while working. Thus, to prevent discomfort and improve health and performance, implement the following.

Finally, for a comprehensive overview based on an evolutionary perspective that explains why TechStress develops, why digital addiction occurs. and what can be done to prevent discomfort and improve health and performance, see our new book by Erik Peper, Richard Harvey and Nancy Faass, Tech Stress-How Technology is Hijack our Lives, Strategies for Coping and Pragmatic Ergonomics.

book cover

References

Borhany, T., Shahid, E., Siddique, W. A., & Ali, H. (2018). Musculoskeletal problems in frequent computer and internet users. Journal of family medicine and primary care7(2), 337–339. 

Enthoven, C. A., Tideman, W.L., Roel of Polling, R.J.,Yang-Huang, J., Raat, H., & Klaver, C.C.W. (2020). The impact of computer use on myopia development in childhood: The Generation R study. Preventtive Medicine, 132, 105988.

Jensen, C., Finsen, L., Sogaard, K & Christensen, H. (2002). Musculoskeletal symptoms and duration of computer and mouse use,  International Journal of Industrial Ergonomics, 30(4-5), 265-275.

Peper, E. & Gibney, K. (2006). Muscle Biofeedback at the Computer- A Manual to Prevent Repetitive Strain Injury (RSI) by Taking the Guesswork out of Assessment, Monitoring and Training. The Biofeedback Federation of Europe. Download free PDF version of the book:  http://bfe.org/helping-clients-who-are-working-from-home/

Peper, E. & Harvey, R. (2008). From technostress to technohealth.  Japanese Journal of Biofeedback Research, 35(2), 107-114.

Peper, E., Harvey, R. & Faass, N. (2020). TechStress: How Technology is Hijacking Our Lives, Strategies for Coping, and Pragmatic Ergonomics. Berkeley: North Atlantic Books.

Peper, E., Harvey, R. & Tylova, H. (2006). Stress protocol for assessing computer related disorders.  Biofeedback. 34(2), 57-62. 

Peper, E., Wilson, V.S., Gibney, K.H., Huber, K., Harvey, R. & Shumay. (2003). The Integration of Electromyography (sEMG) at the Workstation:  Assessment, Treatment and Prevention of Repetitive Strain Injury (RSI). Applied Psychophysiology and Biofeedback, 28 (2), 167-182.

Randolph, S.A. & Cohn, A. (2017).  Computer vision syndrome. Workplace, Health and Safety, 65(7), 328.

Rosenfield, M. (2016). Computer vision syndrome (a.k.a. digital eye strain). Optometry in Practice, 17(1), 1 1 – 10. 

Schneider, M. (2016). Vision for Life, Revised Edition: Ten Steps to Natural Eyesight Improvement. Berkeley: North Atlantic Books. https://self-healing.org/shop/books/vision-for-life-2nd-ed

Sherwin, J.C., Reacher, M.H., Keogh, R. H., Khawaja, A. P., Mackey, D.A.,& Foster, P. J. (2012). The association between time spent outdoors and myopia in children and adolescents. Ophthalmology,119(10), 2141-2151.

Turgut, B. (2018). Ocular Ergonomics for the Computer Vision Syndrome. Journal Eye and Vision, 1(2).

Waderich, K., Peper, E., Harvey, R., & Sara Sutter. (2013). The psychophysiology of contemporary information technologies-Tablets and smart phones can be a pain in the neck. Presented at the 44st Annual Meeting of the Association for Applied Psychophysiology and Biofeedback. Portland, OR.