Francine Shapiro Library - EMDR Bibliography Links
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1. Christman, S., & Garvey, K. (2001, June). Bilateral eye movements reduce cortical activation asymmetries. Presentation at the 2001 EMDR International Association Conference, Austin, TX.
Language: English
Format: Conference
Abstract:
Alternating left-right eye movements (EMs) have been shown to enhance episodic memory recall (Christman & Garvey, 2000). In turn, enhanced recall of episodic, or autobiographical, memories has been linked to increased interhemispheric interaction (Christman & Propper, 2001; Propper & Christman, 1997). Since leftward versus rightward EMs induce right versus hemisphere activation, respectively (Bakan & Svorad, 1969), bilateral EMs may facilitate interhemispheric interaction by balancing hemispheric activation levels. In other words, asymmetries in cortical activation may impair interhemispheric communication. Christman and Garvey (2000), however, demonstrated only that bilateral EMs enhance episodic memory performance; they did not directly measure hemispheric activation. To test this hypothesis directly, participants were administered two behavioral tests that are sensitive to variations in hemispheric activation. The Chimeric Faces Test (Levy, Heller, Banich, & Burton, 1983) involves mirror-image pairs of faces, with one smiling hemiface and one neutral hemiface, presented under conditions of free viewing. Participants are asked to judge which member of a pair looks happier. Right versus left hemiface biases are associated with relative increases in left versus right hemispheric activation. Line bisection tasks also tap into hemispheric activation, with leftward versus rightward bisection errors reflecting increased right versus left hemisphere activation. Bisection tasks, however, are also influenced by premotor asymmetries (e.g., Luh, 1995), and thus represent a less pure measure of hemispheric activation.
METHODS Participants performed blocks of chimeric face and line bisection trials. They then engaged in 30 seconds of alternating left-right saccades (2 eye movements per second). Participants then performed a second block of trials for both tasks.
RESULTS Results showed that behavioral asymmetries in the chimeric face task were significantly reduced after the EMs (p<.029). This supports the hypothesis that bilateral EMs reduce hemispheric activation asymmetries. Performance on line bisection task, however, was unaffected by EMs (F<1), perhaps reflecting the fact that this task is a less direct measure of hemispheric activation.
DISCUSSION These results provide further insight into mechanisms underlying EMDR therapy used for PTSD patients. Reduction in hemispheric activation asymmetry arising from bilateral EMs employed in the current study (and in EMDR) may enhance interhemispheric communication. This interpretation is consistent with Ramachandran (1995), who showed that vestibular stimulation (inducing optokinetic nystagmus and resulting in involuntary left-right EMs) reduces the denial of deficit found in anosagnosia patients.
Ramachandran (1995) suggested that the procedure benefits the hypoaroused right hemisphere, bringing its activation level up to par with the left hemisphere. Similarly, EMs used in EMDR may balance hemispheric activation levels, in turn enhancing interhemispheric communication and retrieval of episodic memories.
Keywords: Bilateral Stimulation Eye Movements
Accuracy Verified: Yes
2. Nieuwenhuis, S., Elzinga, B. M., Ras, P., Berends, F., Duijs, P., Samara, Z., & Slagter, H. (2013, February). Bilateral saccadic eye movements and tactile stimulation, but not auditory stimulation, enhance memory retrieval. Brain & Cognition, 81(1), 52-56. doi:10.1016/j.bandc.2012.10.003.
Language: English
Format: Journal
Abstract:
Recent research has shown superior memory retrieval when participants make a series of horizontal saccadic eye movements between the memory encoding phase and the retrieval phase compared to participants who do not move their eyes or move their eyes vertically. It has been hypothesized that the rapidly alternating activation of the two hemispheres that is associated with the series of left–right eye movements is critical in causing the enhanced retrieval. This hypothesis predicts a beneficial effect on retrieval of alternating left–right stimulation not only of the visuomotor system, but also of the somatosensory system, both of which have a strict contralateral organization. In contrast, this hypothesis does not predict an effect, or a weaker effect, on retrieval of alternating left–right stimulation of the auditory system, which has a much less lateralized organization. Consistent with these predictions, we replicated the horizontal saccade-induced retrieval enhancement (Experiment 1) and showed that a similar retrieval enhancement occurs after alternating left–right tactile stimulation (Experiment 2). Furthermore, retrieval was not enhanced after alternating left–right auditory stimulation compared to simultaneous bilateral auditory stimulation (Experiment 3). We discuss the possibility that alternating bilateral activation of the left and right hemispheres exerts its effects on memory by increasing the functional connectivity between the two hemispheres. We also discuss the findings in the context of clinical practice, in which bilateral eye movements (EMDR) and auditory stimulation are used in the treatment of post-traumatic stress disorder. [Copyright &y& Elsevier].
Keywords: Bilateral Stimulation Memory Retrieval Saccadic Eye Movements Saccades Tactile Stimulation
Accuracy Verified: Yes
3. Barfoot, K. M., Casey, M. C., & Callaway, A. J. (2012, July). Combined EEG and eye-tracking in sports skills training and performance analysis. Presentation at the World Congress of Performance Analysis of Sport IX, University of Wooster.
Language: English
Format: Conference
Abstract:
The use of mobile EEG brainwave monitoring and eye-tracking recorded synchronously
during the training of sports skills offers significant opportunities but creates challenges.
Opportunities:
¨ Measuring neurocognitive activity and visual focus in real time which can be used to
provide immediate feedback to the coach, in ‘real world’ settings, for optimising training
protocols for the individual athlete.
¨ Use of sound output (‘sonification’) in proportion to EEG regions of interest as a
neurofeedback mechanism for athlete self-training.
¨ Application of visualisation protocols and ‘EEG-driven’ PC games where game feedback
based on state of mind is used to optimise mental state prior to performance.
¨ Examining the relationship between eye movement and neuro activity (e.g. saccades and
gamma waves) and in athlete coaching interventions such as sports visual scanning
strategies, Eye Movement Desensitisation & Reprocessing (EMDR) therapy, focussed
relaxation, etc.
Challenges:
¨ The recording of EEG during gross motor behaviour is subject to non-brain artefacts in
the raw (time-domain) EEG, due to the much larger (than EEG) electrical voltages
arising from muscle and eye movements. Practical approaches and signal processing
(frequency domain spectrum) techniques to address these problems will be discussed.
¨ The synchronisation of data recorded on different types of equipment (e.g. EEG, eyetracker,
video, sound, EMG, etc.) with different ‘clocks’ and diverse data formats is
difficult – both in terms of time-stamping the original recordings across all the systems
and playing them back synchronously for subsequent performance analysis. Progress on
creating real-time data export methods which allow synchronous data recording and
playback will be reported.
Examples of studies carried out in archery, golf, motorsport, football and skiing will be
discussed, with a focus on archery where:
¨ Measurements were taken from intermediate, county level, near elite and elite archers.
¨ Archery was chosen to demonstrate the real-time and in-situ quantification of neural
activity compared with target-based measures of performance that archery provides, over a
range of time-spans and skills.
¨ Results demonstrate that there are significant and measurable changes in EEG patterns
during a shot with evidence suggesting that the patterns vary as a function of skill level,
but not simply as a function of score.
Significance of each of these studies for goal-directed learning and performance enhancement
are discussed.
Keywords: EEG Eye Tracking Performance Analysis Sports Skills
Accuracy Verified: Yes
4. Becich, H. A. (1995). The effect of varying the rate of the eye movements in eye movement desensitization reprocessing (EMDR) with battered women. California School of Professional Psychology, Los Angeles, CA. AAT 9531596.
Language: English
Format: Dissertation/Thesis
Abstract:
The rapid saccades used in eye movement desensitization reprocessing (EMDR) have been reputed to be critical to its efficacy. To evaluate this hypothesis, the rate of the eye movements was varied in this study. Subjects included 27 battered women who were rated PTSD-positive by a modified version of the Symptom Checklist (MSC). Participants were randomly assigned to one of three groups: EMDR Fast, EMDR Slow or Control.Prior to treatment, subjects completed the Revised Impact of Events Scale (IES). Treatment involved one experimental session lasting up to 90 minutes. Dependent variables included the Subjective Units of Distress (SUDs) (derived from the Subjective Units of Disturbance Scale), the Validity of Cognition (VOC) and the Vividness of Traumatic Image (VTI) Scales as well as the Intrusion subscales of the MSC and the IES. At post-treatment one week later, subjects again provided responses to the five dependent variables and, for ethical reasons, were provided another session of treatment at the EMDR Fast rate if their SUDs were 2 or greater. Results of the mixed, two factor analyses indicated no differences between the groups. Hence, the outcomes showed that the rapid eye movements did not provide a differential treatment effect as hypothesized. All groups experienced improvement on the SUDs and VTI Scales and the MSC Intrusion subscale, supporting occurrence of an exposure effect. This investigation was the first controlled EMDR study conducted with battered women, as well as the first experiment on this procedure using a clinical population in which the rate of the eye movements was varied. [Author Abstract]
Dissertation Abstracts International: Section B: The Sciences and Engineering. 56(5-B), Nov 1995, pp. 2854
Keywords: Adults Americans Battery Empirical Study Follow-up Study Females Posttraumatic Stress DIsorder PTSD Spouse Abuse Survivors Treatment Effectiveness Treatment Outcome/Clinical Trial
Accuracy Verified: Yes
5. Becker, L. (2000). Effect size. Lee Becker, Ph.D..
Language: English
Format: Other
Abstract:
Effect size (ES) is a name given to a family of indices that measure the magnitude of
a treatment effect. Unlike significance tests, these indices are independent of sample
size. ES measures are the common currency of meta-analysis studies that summarize
the findings from a specific area of research. See, for example, the influential metaanalysis
of psychological, educational, and behavioral treatments by Lipsey and
Wilson (1993).
There is a wide array of formulas used to measure ES. For the occasional reader of
meta-analysis studies, like myself, this diversity can be confusing. One of my
objectives in putting together this set of lecture notes was to organize and summarize
the various measures of ES.
In general, ES can be measured in two ways:
a) as the standardized difference between two means, or
b) as the correlation between the independent variable classification and the
individual scores on the dependent variable. This correlation is called the "effect size
correlation" (Rosnow & Rosenthal, 1996).
These notes begin with the presentation of the basic ES measures for studies with two
independent groups. The issues involved when assessing ES for two dependent groups
are then described.
The psychotherapies include: behavioral treatments (primarily different forms of
exposure therapies), eye movement desensitization and reprocessing (EMDR),
relaxation therapy, hypnosis, and psychodynamic therapy.
The control conditions include: pill placebo (used in the drug treatment studies), wait
list controls, supportive psychotherapy, and no saccades (a control for eye movements
in EMDR studies).
Keywords: Effect Size
Accuracy Verified: Yes
6. Kapoula, Z. (2010, April). EMDR effects on pursuit eye movements. In Research. Symposium conducted at the annual meeting of the EMDR Europe Association, Hamburg, Germany.
Language: English
Format: Conference
Abstract:
This study aimed to objectivize the quality of smooth pursuit eye movements in a standard laboratory task before and after Eye Movement Desensitization and Reprocessing (EMDR) session. EMDR was applied on subject’s autobiographic worries causing moderate distress. The EMDR session was complete in 5 out of 7 cases; distress measured by SUDS (Subjective Units of Disturbance scale) decreased to near zero value. Smooth pursuit eye movement was recorded by Eyelink II video system before and after EMDR. For these five subjects, pursuit eye movement improved after EMDR session, namely the number of CUS (Catch-up saccades) decreased and reciprocally, the gain of the smooth components of the pursuit increased. Such improvement of the smoothness of the pursuit presumably reflects better employment of visual attention needed to follow the target accurately. Perhaps EMDR reducing distress activates a cholinergic effect known to improve ocular pursuit. This approach is novel, Eye movement semiology is known to be a great tool for exploring brain function and plasticity. This preliminary study might be a starting point for further studies of other types of eye movements bringing together neuroscience and psychotherapy.
Learning objectives: Learn the physiologic correlates of EMDR. During EMDR practice observation of the quality of eye movement (smooth and saccadic) can provide to the practitioner valuable, non-verbal feedback.
EMDR can stimulate different types of research, including laboratory research.
Keywords: Eye Movements Research Symposium
Accuracy Verified: Yes
7. Kapoula, Z., Yang, Q., Bonnet, A., Bourtoire, P., & Sandretto, J. (2010, May). EMDR effects on pursuit eye movements. PLoS ONE, 5(5), 1-11, e10762. doi:10.1371/journal.pone.0010762.
Language: English
Format: Journal
Abstract:
This study aimed to objectivize the quality of smooth pursuit eye movements in a standard laboratory task before and after an Eye Movement Desensitization and Reprocessing (EMDR) session run on seven healthy volunteers. EMDR was applied on autobiographic worries causing moderate distress. The EMDR session was complete in 5 out of the 7 cases; distress measured by SUDS (Subjective Units of Discomfort Scale) decreased to a near zero value. Smooth pursuit eye movements were recorded by an Eyelink II video system before and after EMDR. For the five complete sessions, pursuit eye movement improved after their EMDR session. Notably, the number of saccade intrusions—catch-up saccades (CUS)—decreased and, reciprocally, there was an increase in the smooth components of the pursuit. Such an increase in the smoothness of the pursuit presumably reflects an improvement in the use of visual attention needed to follow the target accurately. Perhaps EMDR reduces distress thereby activating a cholinergic effect known to improve ocular pursuit.
Keywords: Eye Movements Mechanism of Action
Accuracy Verified: Yes
8. Stickgold, R. (2002, January). EMDR: A putative neurobiological mechanism of action. Journal of Clinical Psychology, 58(1), 61-75. doi:10.1002/jclp.1129.
Language: English
Format: Journal
Abstract:
Numerous studies have provided evidence for the efficacy of eye movement desensitization and reprocessing therapy (EMDR) in the treatment of PTSD, including recent studies showing it to be more efficient than therapist-directed flooding. But few theoretical explanations of how EMDR might work have been offered. Shapiro, in her original description of EMDR, proposed that its directed eye movements mimic the saccades of rapid eye movement sleep (REM), but provided no clear explanation of how such mimicry might lead to clinical improvment. We now revisit her original proposal and present a complete model for how EMDR could lead to specific improvement in PTSD and related conditions. We propose that the repetitive redirecting of attention in EMDR induces a neurobiological state, similar to that of REM sleep, which is optimally configured to support the cortical integration of traumatic memories into general semantic networks. We suggest that this integration can then lead to a reduction in the strength of hippocampally mediated episodic memories of the traumatic event as well as the memories' associated, amygdala-dependent, negative affect. Experimental data in support of this model are reviewed and possible tests of the model are suggested. [Author Abstract]
Keywords: Cognitive Processes Mechanism of Action Neurobiology Posttraumatic Stress Disorder Psychophysiology PTSD Review Sleep Behavior Treatment Effectiveness
Accuracy Verified: Yes
9. Leone, J., & Dayton, J. (1994). Enhance EMDR outcome through additional saccades: Case study. EMDR Network Newsletter, 4(1), 5-6.
Language: English
Format: Newsletter
Abstract:
A 47-year-old, self-employed businessman, referred for treatment after a near fatal heart attack, was treated with EMDR 6 months after the trauma, and 4 months following his introduction to psychotherapy. though financially successful, he continued to be "driven" toward seeking acclamation from his colleagues. The physician who made the referral did so on the assumption that this client required a significant life style change to decrease stress and workaholic behavior.
Keywords: Saccades
Accuracy Verified: Yes
10. Foster, S., Lendl, J., & Wilson, D. (1992, July). Eye movement desensitization useful against anxiety, trauma. The California Psychologist, 20.
Language: English
Format: Magazine
Abstract:
The Eye Movement Desensitization
and Reprocessing (EMDR)
procedure, developed by Francine
Shapiro, Ph.D., was introduced as a
new rapid treatment for anxiety and
related traumata. Dr. Shapiro
serendipitously discovered that
lateral eye movements (saccades)
produced a decrease in distress
associated with dysfunctional
thoughts. The basic protocol for
integrating EMDR into clinical work
involves the client performing sets
of saccades (usually when tracking
the therapist's finger) while visualizing
a disturbing image, thinking a
disconcerning thought or focusing
on an unpleasant affect. The result is
- often a rapid working through of
even strong negative feelings, a
disappearance of the upsetting
images and a facilitation of cognitive restructuring of dysfunctional
thoughts.
Accuracy Verified: Yes
11. Kapoula, Z., Misset, P., Poncet, S., Bruneau, S., & Bucci, M. P. (2007, June). Eye movement patterns during the Rorschach test: Implications for EMDR. Poster presented at the annual meeting of the EMDR Europe Association, Paris, France.
Language: English
Format: Conference
Abstract:
It is hypothesized that eye movements used in EMDR practice influence both memory and emotional state, some laboratory studies provide evidence for such influence (Christman et al, 2003, Neurobiology; Barrowcliff et al., J. Forensic Psychiatry and Psychology, 2004). From a neurophysiological point of view, it is also interesting to examine to what extent some eye movement parameters may be modulated by memory and emotions. For instance, it is well established that memory driven saccades in simplified laboratory tests, present different characteristics (longer preparation time, lower accuracy, lower velocity) than visually guided movement. During EMDR the eye movements (mostly pursuit) are elicited externally by the therapist, yet at the same time the patient is in touch mentally with the traumatic image and related negative emotions. The physiology of such movements might be different and this could be explored with specific studies. Another important issue is to what extent movements of the eyes are helpful in coding and retrieving visual images. Accordingly to scanpath theory, eye movements are cognitively driven by sensory and motor representation; repetitive eye movements to the same area of an image are attributed to checking if the image corresponds to what the observer imagines (Noton & Stack, 1971; Brandt & Stark, 1997). Future laboratory research could bring together such theories and EMDR psychotherapy, e.g., by examining spontaneous eye movements related to negative image.
In this conference, we will present preliminary data from a laboratory study on eye movement patterns during the Roschach test. Eight healthy students conducted the experiment. Seated in front of a computer screen, subjects were equipped with a binocular video eye tracker (Chronos) sampling eye position images from each eye every 4 msec. Instantaneous eye position data were stored on a computer and analyzed afterwards with laboratory software. Each are of the Roschach test was presented for 30 sec., after which, the experimenter (a psychologist) recorded the response given by the subject.
Analysis of eye movement patterns were examined in relation to subjective verbal reports.
Results: The first question asked was to what extent the eye movement pattern reflected the imaged projected by the subject or by the visual properties of the Rorschach image itself. To gain some insight, we concentrated on the cards for which our subjected gave no standard responses, thus very different from one subject to the other (e.g., card IX). Eye movement exploration (the surface of the image explored, its patiaol composition e.g. the resprctive proportion of horizontal versus vertical movements) was correlated with the verbal report and the specific mental imagery (larger surface, multiple focusing points when several personages or objects were imaged). This provides evident for top-down influence; the eyes are exploring the projective interpretative image; repetitive movements back and forth to same points which help in turn consolidate this mental imagery.
Psychological analysis of eye movements (saccades and fixation) was also made. Saccades are found to be as fast as when looking reflexively to single visual targets; during fixations, however, between saccades, the eyes were more instable, particularly the visual uses were crossing at different depths from one fixation to another. Further ongoing analysis will correlate fixation duration and depth instability to spatial and emotional content of the subjective report.
Keywords: Eye Movements Mechanism of Action Neurobiology Poster Rorschach Test
Accuracy Verified: Yes
12. Martinez, R. (1992, May). Innovative uses. EMDR Network Newsletter, 2(1), 14-15.
Language: English
Format: Newsletter
Abstract:
Jessie Rappaport, R.C.S.W. of Eugene
Oregon, sent in this observation:
He states, "for clients with persistent
negative cognitions such as,
'I don't deserve to be loved', where
EMDR saccades, cognitive interweave,
and all other variations fail to
effectively shift the cognition, he tells
the client, 'I would like you to notice,
if you would, how you fee1 when I
take over the voicing of that belief
and say it to you ...." [An example of
this would be 'you don't deserve to be
loved'.] He does this with eye movements
induced and often at this point
reports that the client will dramatically
shift the polarity when the belief has
been externalized by his voice.
The response is often from the positive
polarity, such as, 'I have every
right to 'be loved' or 'the heck with
you, I'm tired of hearing that', etc.
He states that with particularly fragile
clients, this intervention must be
carefully framed, such as, 'I am taking
over the negative voice that is in
you.'"
Keywords: Cognitions Innovative Uses
Accuracy Verified: Yes
13. Koppel, R. H. (2009, May). Rapid eye movement effects on traumatic memories: A test of the working memory hypothesis. The College of William and Mary, Williamsburg, VA.
Language: English
Format: Dissertation/Thesis
Abstract:
Eye Movement Desensitization and Reprocessing therapy (EMDR) is a psychotherapy that uses
rapid eye movements to alleviate traumatic memories. This experiment examined two working
memory hypotheses proposed to explain how performing rapid eye movements can affect the
vividness, emotionality and completeness of traumatic memories. Participants (N=25) recalled
three traumatic memories and rated them on vividness, emotionality and completeness before
and after performing rapid eye movements. Participants also completed six working memory
tasks to see if a correlation existed between working memory and the effect of rapid eye
movements on memory rating variables. Findings illustrate that there was a significant decrease
pre-test to post-test in vividness. Additionally, the factor underlying the reading span operation
task and the Sternberg item order task significantly correlated with the effect of rapid eye
movements for all memory ratings. The results of the current study support the central executive
hypothesis explanation more than the visuospatial sketchpad storage hypothesis for EMDR.
3
Rapid Eye Movement Effects on Traumatic Memories: A Test of the Working Memory
Hypothesis
In 1987, Francis Shapiro discovered that performing horizontal eye saccades while
holding a traumatic event in mind helped her alleviate the negative symptoms she experienced
from that memory. She developed this intuition into a psychotherapy that is called Eye
Movement Desensitization and Reprocessing (EMDR). This therapy is now a widely-used
technique to treat victims of trauma, people suffering from post-traumatic stress disorder
(PTSD), and people suffering from phobias and other anxiety disorders (Muris & Meckleberger,
1999). Shapiro (2001) describes EMDR as an eight-phase treatment method that includes history
taking, client preparation, assessment, desensitization, installation, body scan, closure and reevaluation.
An important, and distinguishing, component of the EMDR procedure involves the
patient performing rapid bilateral eye movements while thinking about their traumatic memory
and communicating any negative cognition associated with that memory. The horizontal saccadic
eye movements generally involve watching the therapist’s quickly moving finger for 15-20
seconds/set (Shapiro, 2001). Eye saccade sets continue until the patient begins to report that
negative aspects of the memory are being alleviated, and that positive self-cognitions have
replaced the negative self-cognitions associated with the memory (Shapiro, 2001).
Keywords: Hypotheses Rapid Eye Movements REM Traumatic Memories
Accuracy Verified: Yes
14. Morton, B. E., & Paulsen, S. L. (1993). Stress disorders: Cortical plasticity, eye saccades, and multiple personalities. Paper presented at the University of Hawaii School of Medicine and Pacific Institute for Behavioral Medicine. Honolulu, HI.
Language: English
Format: Other
Abstract:
Origin and Nature of Stress Disorders:
The Defense Response occurs as part of the switch from fearful flight (Ego) to cornered, fearless fight (Id) whereby the individual attempts to obtain freedom from restraint through the violence of defensive attack. The activation of the hypothalamic-pituitary-adrenal (HPA) axis is part of this response. Stress Disorders are pathological states resulting in inappropriate, repeated activation of the Defense Response. They appear to be produced from a maladaptive cortical plasticity that occurred whenever the Defense Response failed to protect the organism from trauma.
Keywords: Cortical Plasticity Defense Response Eye Saccades HPA Hypothalamic-Pituitary-Adrenal Multiple Personalities Stress Disorders
Accuracy Verified: Yes