Posture affects memory recall and mood

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

When I sat collapsed looking down, negative memories flooded me and I found it difficult to shift and think of positive memories. While sitting erect, I found it easier to think of positive memories.               -Student participant

Charlie BrownThe link between posture and mood is embedded in idiomatic phrases such as walking tall, standing proud, and an upstanding citizen, versus collapsed, defeated, or in a slump–Language suggests that posture and mood/emotions are connected. Slumped posture is commonly observed in depression (Canales et al., 2010; Michalak et al., 2009) and adapting an upright posture increases positive affect, reduces fatigue, and increases energy in people with mild to moderate depression (Wilkes et al., 2017; Peper & Lin, 2012).

This blog describes in detail our research study that demonstrated  how posture affects memory recall  (Peper et al, 2017). Our findings may explain why depression is increasing the more people use cell phones. More importantly,  learning posture awareness and siting more upright  at home and in the office may be an effective somatic self-healing strategy to increase positive affect and decrease depression.

Background

Most psychotherapies tend to focus on the mind component of the body-mind relationship. On the other hand, exercise and posture focus on the body component of the mind/emotion/body relationship. Physical activity in general has been demonstrated to improve mood and exercise has been successfully used to treat depression with lower recidivism rates than pharmaceuticals such as sertraline (Zoloft) (Babyak et al., 2000). Although the role of exercise as a treatment strategy for depression has been accepted, the role of posture is not commonly included in cognitive behavior therapy (CBT) or biofeedback or neurofeedback therapy.

The link between posture, emotions and cognition to counter symptoms of depression and low energy have been suggested by Wilkes et al. (2017) and Peper and Lin (2012),  . Peper and Lin (2012) demonstrated that if people tried skipping rather than walking in a slouched posture, subjective energy after the exercise was significantly higher. Among the participants who had reported the highest level of depression during the last two years, there was a significant decrease of subjective energy when they walked in slouched position as compared to those who reported a low level of depression. Earlier, Wilson and Peper (2004) demonstrated that in a collapsed posture, students more easily accessed hopeless, powerless, defeated and other negative memories as compared to memories accessed in an upright position. More recently, Tsai, Peper, and Lin (2016) showed that when participants sat in a collapsed position, evoking positive thoughts required more “brain activation” (i.e. greater mental effort) compared to that required when walking in an upright position.

Even hormone levels also appear to change in a collapsed posture (Carney, Cuddy, & Yap, 2010). For example, two minutes of standing in a collapsed position significantly decreased testosterone and increased cortisol as compared to a ‘power posture,’ which significantly increased testosterone and decreased cortisol while standing. As  Professor Amy Cuddy pointed out in herTechnology, Entertainment and Design (TED) talk, “By changing posture, you not only present yourself differently to the world around you, you actually change your hormones” (Cuddy, 2012).  Although there appears to be controversy about the results of this study, the overall findings match mammalian behavior of dominance and submission. From my perspective, the concepts underlying Cuddy’s TED talk are correct and are reconfirmed in our research on the effect of posture.  For more detail about the controversy, see the article by Susan Dominusin in the New York Times,  “When the revolution came for Amy Cuddy,”, and Amy Cuddy’s response (Dominus, 2017;Singal and Dahl, 2016).

The purpose of our study is to expand on our observations with more than 3,000 students and workshop participants. We observed that body posture and position affects recall of emotional memory. Moreover, a history of self-described depression appears to affect the recall of either positive or negative memories.

Method

Subjects: 216 college students (65 males; 142 females; 9 undeclared), average age: 24.6 years (SD = 7.6) participated in a regularly planned classroom demonstration regarding the relationship between posture and mood. As an evaluation of a classroom activity, this report of findings was exempted from Institutional Review Board oversight.

Procedure

While sitting in a class, students filled out a short, anonymous questionnaire, which asked them to rate their history of depression over the last two years, their level of depression and energy at this moment, and how easy it was for them to change their moods and energy level (on a scale from 1–10). The students also rated the extent they became emotionally absorbed or “captured” by their positive or negative memory recall. Half of the students were asked to rate how they sat in front of their computer, tablet, or mobile device on a scale from 1 (sitting upright) to 10 (completely slouched).

Two different sitting postures were clearly defined for participants: slouched/collapsed and erect/upright as shown in Figure 1. To assume the collapsed position, they were asked to slouch and look down while slightly rounding the back. For the erect position, they were asked to sit upright with a slight arch in their back, while looking upward.

Figure 1 body positionFigure 1. Sitting in a collapsed position and upright position (photo by Jana  Asenbrennerova). Reprinted by permission from Gorter and Peper (2011).

After experiencing both postures, half the students sat in the collapsed position while the other half sat in the upright position. While in this position, they were asked to recall/evoke as many hopeless, helpless, powerless, or defeated memories as possible, one after the other, for 30 seconds.

After 30 seconds they were reminded to keep their same position and let go of thinking negative memories. They were then asked to recall/evoke only positive, optimistic, or empowering memories for 30 seconds.

They were then asked to switch positions. Those who were collapsed switched to sitting erect, and those who were erect switched to sitting collapsed. Then they were again asked to recall/evoke as many hopeless, helpless, powerless, or defeated memories as possible one after the other for 30 seconds. After 30 seconds they were reminded to keep their same position and again let go of thinking of negative memories. They were then asked to recall/evoke only positive, optimistic, or empowering memories for 30 seconds, while still retaining the second posture.

They then rated their subjective experience in recalling negative or positive memories and the degree to which they were absorbed or captured by the memories in each position, and in which position it was easier to recall positive or negative experiences.

Results

86% of the participants reported that it was easier to recall/access negative memories in the collapsed position than in the erect position, which was significantly different as determined by one-way ANOVA (F(1,430)=110.193, p < 0.01) and 87% of participants reported that it was easier to recall/access positive images in the erect position than in the collapsed position, which was significantly different as determined by one-way ANOVA (F(1,430)=173.861, p < 0.01) as shown in Figure 2.

Figure 2 emotional recallFigure 2. Percent of respondents who reported that it was easier to recall positive or negative memories in an upright or slouched posture.

The difficulty or ease of recalling negative or positive memories varied depending on position as shown in Figure 3.

Figure 3 access to memoriesFigure 3. The relative subjective rating in the ease or difficulty of recalling negative and positive memories in collapsed and upright positions.

The participants with a high level of depression over the last two years (top 23% of participants who scored 7 or higher on the scale of 1–10) reported that it was significantly more difficult to change their mood from negative to positive (t(110) = 4.08, p < 0.01) than was reported by those with a low level of depression (lowest 29% of the participants who scored 3 or less on the scale of 1–10). It was significantly easier for more depressed students to recall/evoke negative memories in the collapsed posture (t(109) = 2.55, p = 0.01) and in the upright posture (t(110) = 2.41, p ≦0.05 he) and no significant difference in recalling positive memories in either posture, as shown in Figure 4.

Figure 4 least most depressedFigure 4. Differences is in memory access for participants with a history of least or most depression.

For all participants, there was a significant correlation (r = 0.4) between subjective energy level and ease with which they could change from negative to positive mood. There were no significance differences for gender in all measures except that males reported a significantly higher energy level than females (M = 5.5, SD = 3.0 and M = 4.7, SD = 3.8, respectively; t(203) = 2.78, p < 0.01).

A subset of students also had rated their posture when sitting in front of a computer or using a digital device (tablet or cell phone) on a scale from 1 (upright) to 10 (completely slouched). The students with the highest levels of depression over the last two years reporting slouching significantly more than those with the lowest level of depression over the last two years (M = 6.4, SD = 3.5 and M = 4.6, SD = 2.6; t(46) = 3.5, p < 0.01).

There were no other order effects except of accessing fewer negative memories in the collapsed posture after accessing positive memories in the erect posture (t(159)=2.7, p < 0.01). Approximately half of the students who also rated being “captured” by their positive or negative memories were significantly more captured by the negative memories in the collapsed posture than in the erect posture (t(197) = 6.8, p < 0.01) and were significantly more captured by positive memories in the erect posture than the collapsed posture (t(197) = 7.6, p < 0.01), as shown in Figure 5.

Figure 5 Posture dependent ratingFigure 5. Subjective rating of being captured by negative and positive memories depending upon position.

Discussion

Posture significantly influenced access to negative and positive memory recall and confirms the report by Wilson and Peper (2004). The collapsed/slouched position was associated with significantly easier access to negative memories. This is a useful clinical observation because ruminating on negative memories tends to decrease subjective energy and increase depressive feelings (Michi et al., 2015). When working with clients to change their cognition, especially in the treatment of depression, the posture may affect the outcome. Thus, therapists should consider posture retraining as a clinical intervention. This would include teaching clients to change their posture in the office and at home as a strategy to optimize access to positive memories and thereby reduce access or fixation on negative memories. Thus if one is in a negative mood, then slouching could maintain this negative mood while changing body posture to an erect posture, would make it easier to shift moods.

Physiologically, an erect body posture allows participants to breathe more diaphragmatically because the diaphragm has more space for descent. It is easier for participants to learn slower breathing and increased heart rate variability while sitting erect as compared to collapsed, as shown in Figure 6 (Mason et al., 2017).

Figure 6 collapse and physiologyFigure 6. Effect of posture on respiratory breathing pattern and heart rate variability.

The collapsed position also tends to increase neck and shoulder symptoms This position is often observed in people who work at the computer or are constantly looking at their cell phone—a position sometimes labeled as the i-Neck.

Implication for therapy

In most biofeedback and neurofeedback training sessions, posture is not assessed and clients sit in a comfortable chair, which automatically causes a slouched position. Similarly, at home, most clients sit on an easy chair or couch, which lets them slouch as they watch TV or surf the web. Finally, most people slouch when looking at their cellphone, tablet, or the computer screen (Guan et al., 2016). They usually only become aware of slouching when they experience neck, shoulder, or back discomfort.

Clients and therapists are usually not aware that a slouched posture may decrease the client’s energy level and increase the prevalence of a negative mood. Thus, we recommend that therapists incorporate posture awareness and training to optimize access to positive imagery and increase energy.

References

Babyak, M., Blumenthal, J. A., Herman, S., Khatri, P., Doraiswamy, M., Moore, K., … Krishnan, K. R. (2000). Exercise treatment for major depression: maintenance of therapeutic benefit at 10 months. Psychosomatic Medicine, 62(5), 633–638. 

Canales, J. Z., Cordas, T. A., Fiquer, J. T., Cavalcante, A. F., & Moreno, R. A. (2010). Posture and body image in individuals with major depressive disorder: A controlled study. Revista brasileira de psiquiatria, 32(4), 375–380.

Carney, D. R., Cuddy, A. J., & Yap, A. J. (2010). Power posing brief nonverbal displays affect neuroendocrine levels and risk tolerance. Psychological Science, 21(10), 1363–1368.

Cuddy, A. (2012). Your body language shapes who you are. Technology, Entertainment, and Design (TED) Talk, available at:  www.ted.com/talks/amy_cuddy_your_body_language_shapes_who_you_are

Dominus, S. (2017, October 18). When the revolution came for Amy Cuddy. New York Times Magazine, https://www.nytimes.com/2017/10/18/magazine/when-the-revolution-came-for-amy-cuddy.html?_r=0

Gorter, R. & Peper, E. (2011). Fighting Cancer-A Non Toxic Approach to Treatment. Berkeley, CA: North Atlantic Books

Guan, X., Fan, G., Chen, Z., Zeng, Y., Zhang, H., Hu, A., … He, S. (2016). Gender difference in mobile phone use and the impact of digital device exposure on neck posture. Ergonomics59(11), 1453–1461.

Mason, L., Joy, M., Peper, E., & Harvey, R, A. (2017). Posture Matters. Poster presented at the 48th Annual Meeting of the Association for Applied Psychophysiology and Biofeedback, Chicago, IL March, 2017. Abstract published in Applied Psychophysiology and Biofeedback, 42(2), 148.

Michalak, J., Troje, N. F., Fischer, J., Vollmar, P., Heidenreich, T., & Schulte, D. (2009). Embodiment of sadness and depression: Gait patterns associated with dysphoric mood. Psychosomatic Medicine, 71(5), 580–587.

Michl, L. C., McLaughlin, K. A., Shepherd, K., & Nolen-Hoeksema, S. (2013). Rumination as a mechanism linking stressful life events to symptoms of depression and anxiety: Longitudinal evidence in early adolescents and adults. Journal of Abnormal Psychology122(2), 339.

Peper, E. & Lin, I-M. (2012). Increase or decrease depression: How body postures influence your energy level. Biofeedback, 40(3), 126–130.

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

Singal, J. and Dahl, M. (2016, Sept 30 ) Here Is Amy Cuddy’s Response to Critiques of Her Power-Posing Research. https://www.thecut.com/2016/09/read-amy-cuddys-response-to-power-posing-critiques.html

Tsai, H. Y., Peper, E., & Lin, I. M. (2016). EEG patterns under positive/negative body postures and emotion recall tasks. NeuroRegulation, 3(1), 23–27.

Wilkes, C., Kydd, R., Sagar, M., & Broadbent, E. (2017). Upright posture improves affect and fatigue in people with depressive symptoms. Journal of Behavior Therapy and Experimental Psychiatry, 54, 143–149.

Wilson, V.E. and Peper, E. (2004). The effects of upright and slumped postures on the generation of positive and negative thoughts. Applied Psychophysiology and Biofeedback, 29(3), 189–195.

We thank Frank Andrasik for his constructive comments.

 


Do you blank out on exams? Improve school performance with breathing* **

lec03a-breathing-part-1-intro“I opened the exam booklet and I went blank.”

“When I got anxious, I took a slow breath, reminded myself that I would remember the material. I successfully passed the exam.”

“I was shocked, when I gasped, I could not remember my girlfriend’s name and then I could not remember my mother’s name. When breathed slowly, I had no problem and easily remembered both”

Blanking out the memorized information that you have studied on an exam is a common experiences of students even if they worked hard (Arnsten, Mazure, & Sinha, 2012).    Fear and poor study habits often contribute to forgetting the material (Fitkov-Norris, & Yeghiazarian, 2013). Most students study while listening to music, responding to text message, or monitoring social network sites such as, Facebook, twitter, Instagram, or Pinterest (David et al., 2015).. Other students study the material for one class then immediately shift and study material from another class. While at home they study while sitting or lying on their bed. Numerous students have internalized the cultural or familial beliefs that math is difficult and you do not have the aptitude for the material—your mother and father were also poor in math (Cherif, Movahedzadeh, Adams, & Dunning, 2013). These beliefs and dysfunctional study habits limit learning (Neal, Wood, & Drolet, 2013).

Blanking out on an exam or class presentation is usually caused by fear or performance anxiety which triggers a stress response (Hodges, 2015; Spielberger, Anton, & Bedell, 2015). At that moment, the brain is flooded with thoughts such as, I can’t do it,”  “I will fail,” “I used to know this, but…”, or “What will people think?” The body responds with a defense reaction as if you are being threatened and your survival is at stake.  The emotional reactivity and anxiety overwhelms cognition, resulting in an automatic ‘freeze’ response of breath holding or very shallow breathing. At that moment, you blank out (Hagenaars, Oitzl, & Roelofs, 2014; Sink et al., 2013; Von Der Embse, Barterian, & Segool, 2013).

Experience how your thinking is affected by your breathing pattern.  Do the following practice with another person.

Have the person ask you a question and the moment you hear the beginning of the question, gasp as if you are shocked or surprised.  React just as quickly and automatically as you would if you see a car speeding towards you.  At that moment of shock or surprise, you do not think, you don’t spend time identifying the car or look at who is driving. You reflexively and automatically jump out of the way. Similarly in this exercise, when you are asked to answer a question, act as if you are as shocked or surprised to see a car racing towards you.

Practice gasping at the onset of hearing the beginning of a question such as,  “What day was it yesterday?” At the onset of the sound, gasp as if startled or afraid. During the first few practices, many people wait until they have heard the whole phrase before gasping.  This would be similar to seeing a car racing towards you and first thinking about the car, at that point you would be hit. Repeat this a few times till it is automatic.

Now change the breathing pattern from gasping to slow breathing and practice this for a few times.

When you hear the beginning of the question breathe slowly and then exhale.” Inhale slowly for about 4 seconds while allowing your abdomen to expand and then exhale softly for about 5 or six seconds.  Repeat practicing slow breathing in response to hearing the onset of the question until it is automatic.

Now repeat the two breathing patterns (gasping and slow breathing) while the person asks you a subtraction or math questions such as, “Subtract 7 from 93.” 

In research with more than 100 college students, we found that students had significantly more self-reported anxiety and difficulty in solving math problems when gasping as compared to slow breathing as shown Figure 1 (Lee et al, 2016; Peper, Lee, Harvey & Lin, 2016).

math-and-anxiety-gasping-db

Fig 1. The effect of breathing style on math performance.  Diaphragmatic breathing significantly increased math performance and decreased anxiety (from: Peper, Lee, Harvey & Lin, 2016).

As one 20 year old college student said, “When I gasped, my mind went blank and I could not do the subtraction. When I breathed slowly, I had no problem doing the subtractions. I never realized that breathing had such a big effect upon my performance.”

When you are stressed and blank out, take a slow diaphragmatic breath to improve performance; however, it is only effective if you have previously studied the materials effectively. To improve effective learning incorporate the following concepts when studying.

  1. Approached learning with a question. When you begin to study the material or attend a class, ask yourself a question that you would like to be answered.  When you have a purpose, it is easier to stay emotionally present and remember the material (Osman, & Hannafin, 1994).
  2. Process what you are learning with as many sensory cues as possible. Take hand written notes when reading the text or listening to your teacher. Afterwards meet with your friends in person, on Skype and again discuss and review the materials.  As you discuss the materials, add comments to your notes.  Do not take notes on your computer because people can often type almost as quickly as someone speaks. The computer notes are much less processed and are similar to the experience of a court or medical transcriptionist where the information flows from the ears to the fingers without staying in between.  College students who take notes in class on a computer or tablets perform worse on exams than students who write notes. When you write your notes you have to process the material and extract and synthesis relevant concepts.
  3. Review the notes and material before going to sleep. Research has demonstrated that whatever material is in temporary memory before going to sleep will be more likely be stored in long term memory (Gais et al., 2006; Diekelmann et al., 2009).  When you study material is stored in temporary memory, and then when you study something else, the first material tends to displaced by the more recent material. The last studied material is more likely stored in long term memory. When you watch a movie after studying, the movie content is preferentially stored in permanent memory during sleep. In addition, what is emotionally most important to you is usually stored first. Thus, instead of watching movies and chatting on social media, discuss and review the materials just before you go to sleep.
  4. Learning is state dependent. Study and review the materials under similar conditions as you will be tested.  Without awareness the learned content is covertly associated with environmental, emotional, social and kinesthetic cues.  Thus when you study in bed, the material is most easily accessed while lying down. When you study with music, the music become retrieval trigger.  Without awareness the materials are encoded with the cues of lying down or the music played in the background.  When you come to the exam room, none of those cues are there, thus it is more difficult to recall the material (Eich, 2014).
  5. Avoid interruptions. When studying each time you become distracted by answering a text message or responding to social media, your concentration is disrupted (Swingle, 2016). Imagine that learning is like scuba diving and the learning occurs mainly at the bottom. Each interruption forces you to go to the surface and it takes time to dive down again. Thus you learn much less than if you stayed at the bottom for the whole time period.
  6. Develop study rituals.  Incorporate a ritual before beginning studying and repeat it during studying such as three slow breaths.  The ritual can become the structure cue associated with the learned material. When you come to exam and you do not remember or are anxious, perform the same ritual which will allow easier access to the memory.
  7. Change your internal language. What we overtly or covertly say and believe is what we become. When you say, “I am stupid”, “I can’t do math,” or “It is too difficult to learn,” you become powerless which increases your stress and inhibits cognitive function.  Instead, change your internal language so that it implies that you can master the materials such as, “I need more time to study and to practice the material,”  “Learning just takes time and at this moment it may take a bit longer than for someone else,” or “I need a better tutor,”

When you take charge of your study habits and practice slower breathing during studying and test taking, you may experience a significant improvement in learning, remembering, accessing, and processing information.

References

Arnsten, A., Mazure, C. M., & Sinha, R. (2012). This is your brain in meltdown. Scientific American, 306(4), 48-53.

Cherif, A. H., Movahedzadeh, F., Adams, G. E., & Dunning, J. (2013). Why Do Students Fail?. Higher Learning, 227, 228.

David, P., Kim, J. H., Brickman, J. S., Ran, W., & Curtis, C. M. (2015). Mobile phone distraction while studying. new media & society, 17(10), 1661-1679.

Diekelmann, S., Wilhelm, I., & Born, J. (2009). The whats and whens of sleep-dependent memory consolidationSleep medicine reviews13(5), 309-321.

Eich, J. E. (2014). State-dependent retrieval of information in human episodic memory. Alcohol and Human Memory (PLE: Memory)2, 141.

Fitkov-Norris, E. D., & Yeghiazarian, A. (2013). Measuring study habits in higher education: the way forward?. In Journal of Physics: Conference Series (Vol. 459, No. 1, p. 012022). IOP Publishing.

Gais, S., Lucas, B., & Born, J. (2006). Sleep after learning aids memory recall. Learning & Memory13(3), 259-262.

Hagenaars, M. A., Oitzl, M., & Roelofs, K. (2014). Updating freeze: aligning animal and human research. Neuroscience & Biobehavioral Reviews, 47, 165-176.

Hodges, W. F. (2015). The psychophysiology of anxiety. Emotions and Anxiety (PLE: Emotion): New Concepts, Methods, and Applications, 12, 175.

Lee, S., Sanchez, J., Peper, E., & Harvey, R. (2016). Effect of Breathing Style on Math Problem Solving. Presented at the 47th Annual Meeting of the Association for Applied Psychophysiology and Biofeedback, Seattle WA, March 9-12, 2016

Neal, D. T., Wood, W., & Drolet, A. (2013). How do people adhere to goals when willpower is low? The profits (and pitfalls) of strong habits. Journal of Personality and Social Psychology, 104(6), 959.

Osman, M. E., & Hannafin, M. J. (1994). Effects of advance questioning and prior knowledge on science learning. The Journal of Educational Research,88(1), 5-13.

Peper, E., Lee, S., Harvey, R., & Lin, I-M. (2016). Breathing and math performance: Implication for performance and neurotherapy. NeuroRegulation, 3(4),142–149.

Spielberger, C. D., Anton, W. D., & Bedell, J. (2015). The nature and treatment of test anxiety. Emotions and anxiety: New concepts, methods, and applications, 317-344.

Sink, K. S., Walker, D. L., Freeman, S. M., Flandreau, E. I., Ressler, K. J., & Davis, M. (2013). Effects of continuously enhanced corticotropin releasing factor expression within the bed nucleus of the stria terminalis on conditioned and unconditioned anxiety. Molecular psychiatry, 18(3), 308-319.

Swingle, M. (2016). i-Minds: How cell phones, computers, gaming and social media are changing our brains, our behavior, and the evolution of our species. Gabriola Island, BC, Canada: New Society Publishers.

Von Der Embse, N., Barterian, J., & Segool, N. (2013). Test anxiety interventions for children and adolescents: A systematic review of treatment studies from 2000–2010. Psychology in the Schools, 50(1), 57-71.

*I thank Richard Harvey, PhD. for his constructive feedback and comments and Shannon Lee for her superb research.

** This blog was adapted from: Lee, S., Sanchez, J., Peper, E., & Harvey, R. (2016). Effect of Breathing Style on Math Problem Solving. Presented at the 47th Annual Meeting of the Association for Applied Psychophysiology and Biofeedback, Seattle WA, March 9-12, 2016