Tag: SMU Department of Psychology

Children’s sense of threat from parental fighting determines trauma symptoms

Post author By Margaret Allen
Post date March 24, 2010

If children feel threatened by even very low levels of violence between their parents, they may be at increased risk for developing trauma symptoms, new research suggests.

A study by psychologists at SMU found that children who witness violence between their mother and her intimate partner report fewer trauma symptoms if they don’t perceive the violence as threatening.

The research highlights the importance of assessing how threatened a child feels when his or her parents are violent toward one another, and how that sense of threat may be linked to symptoms of trauma.

Children’s perception of threat determines any trauma
“Our results indicated a relation between children’s perception of threat and their trauma symptoms in a community sample reporting relatively low levels of violence,” said Deborah Corbitt-Shindler, a doctoral candidate in the psychology department at SMU. “The results of the study suggest that even very low levels of violence, if interpreted as threatening by children, can influence the development of trauma symptoms in children.”

The researchers presented their findings February 24 at the “National Summit on Interpersonal Violence and Abuse Across the Lifespan: Forging a Shared Agenda” in Dallas. The scientific conference was sponsored by the National Partnership to End Interpersonal Violence Across the Lifespan.

Family violence experts estimate that more than half of children exposed to intimate partner violence experience trauma symptoms, such as bad dreams, nightmares and trying to forget about the fights.

SMU study surveyed Dallas area families
The SMU study of 532 children and their mothers looked at the link between intimate partner violence and trauma symptoms in children. The families were recruited from communities in the urban Dallas area. The National Institute of Mental Health funded the research.

In the study, mothers were asked to describe any violent arguments they’d had with their intimate partners, and they were asked about trauma symptoms they may have experienced because of the violence.

Similarly, the children in the study, age 7 to 10 years old, were asked to appraise how threatened they felt by the violence they witnessed, and about trauma symptoms they may have experienced because of the violence. The researchers defined “threat” as the extent to which children are concerned that: a family member might be harmed, the stability of the family is threatened, or a parent won’t be able to care for them.

Trauma: Nightmares, bad dreams, trying to forget
To assess trauma, children were asked questions such as if they’ve had bad dreams or nightmares about their mom’s and dad’s arguments or fights; if thoughts of the arguments or fights ever just pop into their mind; if they ever try to forget all about the arguments and fights; and if they ever wish they could turn off feelings that remind them of the arguments and fights.

The SMU researchers found that even when mothers reported an episode of intimate partner violence, their children reported fewer trauma symptoms when they didn’t view the episode as threatening. Although a mother’s emotions sometimes affect their children’s emotions, in this study the mothers’ trauma symptoms were unrelated to the children’s traumatic responses to the violence.

Corbitt-Shindler conducted the study in conjunction with her faculty advisers — Renee McDonald, associate professor, and Ernest Jouriles, professor and chair of the SMU Psychology Department. Additional co-authors of the study were SMU clinical psychology doctoral candidates Erica Rosentraub and Laura Minze; and Rachel Walker, SMU psychology department research assistant. — Margaret Allen

Tags Deborah Corbitt-Shindler, Dedman College, Erica Rosentraub, Ernest Jouriles, Laura Minze, Rachel Walker, Renee McDonald, SMU Department of Psychology

Health & Medicine Mind & Brain SMU In The News Student researchers

SMU’s Tart presents research linking antidepressants and obesity

Post author By Margaret Allen
Post date March 9, 2010

Candyce D. Tart

The research of Candyce D. Tart, a doctoral candidate in the SMU Psychology Department’s Anxiety Research and Treatment Program, was featured on Medscape.com.

Tart presented the research recently at the Anxiety Disorders Association of America 30th Annual Conference. Tart collaborated on the research with principal investigator Jitender Sareen M.D., associate professor and director of research in the Psychiatry Department at the University of Manitoba, Winnipeg, Canada.

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According to the Medscape.com article, the researchers “found that the obesity rate among individuals taking antidepressants during the past 12 months was 1.5 times greater compared with individuals not taking the medications. In addition, the obesity rate among subjects taking antipsychotics was more than double.”

The study relied on a large, nationally representative sample of 36,984 participants who were participants in the Canadian Community Health Survey Mental Health and Well-being.

Tart is quoted in the article as saying: “There are issues that haven’t really been addressed in a population that already is at risk for unhealthy behaviors, since the risk for obesity is added on top of their mental illness.”

Excerpt:

By Crina Frincu-Mallos, PhD
Medscape.com
March 8, 2010 (Baltimore, Maryland) — Psychotropic medications, specifically antidepressants and antipsychotics, are associated with higher rates of obesity, new national data suggest.

The research, presented here at the Anxiety Disorders Association of America 30th Annual Conference, shows that the obesity rate among individuals taking antidepressants during the past 12 months was 1.5 times greater compared with individuals not taking these medications. In addition, the obesity rate among subjects taking antipsychotics was more than double.

A collaboration between researchers from the United States and Canada, the study examined the relationship between obesity and specific classes of psychotropic medications, including antidepressants, antipsychotics, anxiolytics, hypnotics, and mood stabilizers, in a large, nationally representative sample of 36,984 participants.

Study subjects were participants in the Canadian Community Health Survey Mental Health and Well-being.

Read “Psychotropic Medications Linked to Increased Rates of Obesity“ at Medscape.com. Free registration is required to access the article.

Related links:
SMU Psychology Department’s Anxiety Research and Treatment Program

Tags Candyce D. Tart, Dedman College, SMU Department of Psychology

Health & Medicine Mind & Brain

Breathing technique can reduce frequency, severity of asthma attacks

Post author By Margaret Allen
Post date August 14, 2009

Mueret10%2C-9-09%2Clr.jpg As the health care reform debate turns to cutting costs and improving treatment outcomes, two SMU professors are expanding a study that shows promise for reducing both the expense and suffering associated with chronic asthma.

Thomas Ritz and Alicia Meuret, both of SMU’s Psychology Department, have developed a four-week program to teach asthmatics how to better control their condition by changing the way they breathe.

With the help of a four-year, $1.4 million grant from the National Institutes of Health, they plan to engage 120 Dallas County patients in four weeks of breathing training by the study’s projected end in July 2012. Their co-investigators include David Rosenfield, also of SMU’s Psychology Department, and Mark Millard, M.D., of Baylor University Medical Center.

Mueret8%2C-9-09%2Clr.jpg More than 22 million Americans suffer from asthma at an estimated annual economic cost of more than $19 billion, according to the American Lung Association. The number of cases doubled between 1980 and 1995, prompting the U.S. Department of Health and Human Services to classify the disease as an epidemic in 2000.

During an attack, sufferers tend to hyperventilate, breathing fast and deep against constricted airways to fight an overwhelming feeling of oxygen deprivation.

Unfortunately, this makes the problem worse by lowering the body’s carbon dioxide levels, which restricts blood flow to the brain and can further irritate already hypersensitive bronchial passages.

Patients who “overbreathe” on a sustained basis risk chronic CO₂ deficiencies that make them even more vulnerable to future attacks. Rescue medications that relieve asthma symptoms do nothing to correct breathing difficulties associated with hyperventilation.

As part of SMU’s Stress, Anxiety and Chronic Disease Research Program, Ritz and Meuret use their biofeedback-based Capnometry-Assisted Respiratory Training (CART) to teach asthma patients to normalize and reverse chronic overbreathing. A hand-held device called a capnometer measures the amount of CO₂ exhaled. Using this device, patients learn how to breathe more slowly, shallowly and regularly.

Mueret4a%2C-9-09%2Clr.jpg CART techniques could have a positive impact on quality of asthma treatment even as they reduce the need for acute care, Ritz says.

“The research shows that this kind of respiratory therapy can limit both the severity and frequency of asthma attacks,” he says. “That means fewer doctor visits and less frequent use of rescue medications, with the associated savings of both time and money.”

And for those who count any year without a trip to the emergency room as a year with a good treatment outcome, that means a higher quality of life, says Meuret, who lives with asthma herself.

“The training gives patients new ways to deal with acute symptoms, and that helps them to feel more in control,” she says. — Kathleen Tibbetts

(Photos: SMU Professor Alicia Meuret uses biofeedback data to demonstrate the relationship between oxygen and carbon dioxide levels in hyperventilation.)

News coverage:
ScienceDaily
physorg.com
Health.am
e! Science News
RTMagazine.com
medindia.net
Bio-Medicine.org
medicalnewstoday.com

Tags Alicia E. Meuret, Dedman College, SMU Department of Psychology, Thomas Ritz

Health & Medicine Learning & Education Mind & Brain

Déjà Vu research pushes around memory, creates illusion of past encounter

Post author By Margaret Allen
Post date June 19, 2009

Brown%2C%20Alan2%206-19-09%20photoshopped.jpg

A new study by research psychologists Alan S. Brown of SMU and Elizabeth Marsh of Duke University provides new clues about déjà vu, that eerie sense of experiencing a moment for the second time.

These clues, in turn, could help unlock the secrets of the human brain.

“Déjà vu is inappropriate behavior by the brain,” says Brown, professor in SMU’s Department of Psychology and a leading researcher on memory. “By shedding light on this odd phenomenon, we can better understand normal memory processes.”

Published in the May issue of “Psychological Science,” the study significantly extends research on the déjà vu theory of “double perception,” which suggests that a quick glance at a scene can make it appear strangely familiar when it is fully perceived moments later.

“This is easy to imagine in today’s distracted society,” Brown says. “Let’s say you enter a new museum, glancing at artwork while talking on your cell phone. Upon hanging up, you look around and sense you’ve been there long ago.”

According to double perception theory, the initial glance created a mushy memory without time-space context, Brown says. “When you then consciously register the scene, the brain connects the two memories — and you get that spooky feeling.”

Brown and Marsh re-created this experience in the laboratory using unique symbols. In their trials, a symbol was flashed at a subliminal level on a computer screen, followed by a longer view of the same or a different symbol, or no symbol.

When a flash was followed by its identical symbol, participants were five times more likely to say they had seen that symbol sometime before the experiment.

“We pushed memory around,” Brown says. “We changed people’s views of their personal past by instilling a false sense of a previous encounter.”

In pushing its participants’ memories to a time and place outside the laboratory, the new study goes beyond the few previous studies of double perception that have been conducted in the past 100 years. Those studies used words or names, rather than symbols.

“Words and names are contaminated because study participants actually could have encountered them before the experiment,” Brown says, “but it’s extremely unlikely that they ever had encountered our symbols. Our study more closely parallels a quick glance at an unfamiliar object in the real world.”

In addition to double perception, researchers have other theories about the cause of déjà vu, which is French for “already seen.” These theories include a brief dysfunction in the brain, such as a seizure, and “episodic familiarity,” when a forgotten memory connects with part of the present experience.

Brown and Marsh tested episodic familiarity in a 2008 study published in “Psychonomic Bulletin & Review,” in which participants were quickly shown photos of college campuses they had never visited. Upon returning to the laboratory several weeks later, they viewed a series of new and old campus photos and judged whether they had been to the locations. The study showed that the initial brief exposure increased participants’ beliefs that they had visited these colleges — when, in fact, they hadn’t.

“Déjà vu is such a rare event, with potentially numerous causes,” Brown says. “If we can nudge people a little bit in that direction, we can learn the mechanisms behind it.” — Sarah Hanan

Tags Alan S. Brown, Dedman College, Elizabeth Marsh, SMU Department of Psychology

Culture, Society & Family Health & Medicine Learning & Education Mind & Brain

Psychological discomfort discourages eating disorders

Post author By Margaret Allen
Post date November 1, 2008

Popular culture’s image of the 21st-century woman is tall, large-breasted, narrow-hipped and ultra-slender. Like cultural standards of beauty throughout history, today’s “thin ideal” is unattainable for most women; for many, it also can be destructive.

Katherine Presnell, assistant professor of psychology, is helping at-risk teens challenge this ideal with the Body Project, an eating disorder prevention program that she helped develop with psychology professor Eric Stice at the University of Texas at Austin, where she earned her doctorate in 2005.

Since Stice conducted the first trial in 1998, more than 1,000 high school and college women, including 62 SMU students, have completed the program, including a research trial led by SMU Ph.D. students.

Independent studies conducted at universities nationwide and a recent analysis have shown that the Body Project significantly outperforms other interventions in promoting body acceptance, discouraging unhealthy dieting, reducing the risk of obesity and preventing eating disorders. And these results have persisted for three years.

Prevention is critical because about 10 percent of late-adolescent and adult female Americans experience eating disorder symptoms.

Katherine Presnell

Less than a third seek treatment, and less than half of those experience lasting results, says Presnell, director of SMU’s Weight and Eating Disorders Research Program in the Department of Psychology in SMU’s Dedman College.

While traditional interventions focus on education about anorexia, bulimia and binge eating, the Body Project is based on cognitive dissonance, which is the 1957 theory that inconsistent beliefs and behaviors create a psychological discomfort that motivates individuals to change their beliefs or behaviors.

While working with a patient who had anorexia during his postdoctoral studies at Stanford University, UT’s Stice says he asked her “to talk me out of being anorexic, and it was a very powerful exercise. Arguing against her own arguments caused her to rethink her perspective on her illness.”

Pictured right: Eric Stice

Body Project participants, recruited through fliers and mailings, argue and act against the thin ideal during four small-group sessions with a trained leader. They write letters to hypothetical girls about its emotional and physical costs, and challenge negative “fat talk” while affirming strong, healthy bodies.

“Many girls don’t question the messages we get from the media, the fashion industry, our peers and parents that it’s important to achieve the thin ideal at any cost,” Presnell says. “We have the girls critically evaluate the ideal, and that creates the dissonance they work to resolve.”

The Body Project includes a four-session weight management intervention that helps participants make small lifestyle changes to gain control over eating, such as scheduling time for daily exercise and a nutritious breakfast, and rewarding themselves with a book or bath rather than food.

“These little tweaks help participants maintain a healthy body weight and ward off unhealthy behaviors such as extreme dieting, fasting and self-induced vomiting to lose weight,” Presnell says. — Sarah Hanan

Tags Dedman College, Eric Stice, Katherine Presnell, SMU Department of Psychology