Tags Posts tagged with "Hyunsik Kim"

Hyunsik Kim

Hyunsik Kim and Erin Kang. Photo from Matthew Lerner’s lab

By Daniel Dunaief

This is the second half of a two-part series on autism research conducted by Hyunsik Kim and Erin Kang.

 Last week we focused on the work of Stony Brook University graduate student Hyunsik Kim, who used three criteria to diagnose autism. This week we will feature the work of another SBU graduate student in the Department of Psychology, Erin Kang, who specifically explored the types and severity of communication difficulties autistic children have. 

Words and the way people use them can offer clues about autism. Looking closely at pronoun reversals, speech delays, perseveration and 10 other characteristics, Kang determined that the number of features was a “powerful predictor of an autism spectrum disorder diagnosis.” 

In a paper published online in the Journal of Clinical Child & Adolescent Psychology, Kang grouped children from 6 to 18 years old into different subgroups based on their communication patterns and used a statistical method that allows the data to “speak for itself,” in terms of finding groups based on the patterns of how the communication difficulties are associated and to classify them.

According to Kang, heterogeneity is an important feature of autism spectrum disorder. “There has been a greater effort into understanding whether subgroups exist in ASD populations,” she explained in an email. By examining the atypical communication characteristics, she found four subgroups. These groups differed from each other, not only with autism, but on multiple measures, including the occurrence of anxiety or depression and with intellectual disabilities.

The communication difficulties occur at different rates within the autism children throughout Long Island that Kang studied.

Kang said her work has been “building on the previous literature,” although many of the previous studies focused on characterizing autism for children who were younger than 6.

“There are few studies on specific symptoms (e.g., stereotyped speech) across the body of literature,” she explained, adding that she’s passionate about exploring the trajectory of development over time with or without intervention. 

She and her co-authors, Ken Gadow and Matthew Lerner, who are also at Stony Brook University, are working on a follow-up paper that attempts to explore how changes in the pattern of communication challenges examined in the paper relate to other clinical aspects and outcomes.

Kang believes her results have clinical implications that will help in understanding autism. Atypical communication features are a good predictor of diagnostic status. “This can provide an advantage in assessing social communication profiles in autism,” she said. “It’s hopefully valuable in a low-resource setting.”

Parents might be asked 13 questions on a checklist, which could serve as an initial screening for more comprehensive autism evaluations, rather than a multiple checklist that could take a while for parents to complete. The different categories had specific features that distinguished them. 

“There’s been quite a bit of work in the speech and language field,” said Lerner, an associate professor of psychology, psychiatry and pediatrics in the Department of Psychology at Stony Brook University and Kang’s mentor. “This approach allowed us to ask about some of the specific types of language differences we often see.”

Lerner said what Kang found is that specific characteristics do tend to cluster together in “interesting and unique ways that can tell us more about the communicative phenotype of autism.”

One of the groups, which she called “little professors,” had speech patterns with considerable perseveration. In perseveration, a person repeats a word or phrase, even when a question or stimulus that might elicit that phrase no longer continues. As an example, Dustin Hoffman in the movie “Rain Man” frequently repeated the number of minutes until Judge Wapner was on TV.

“These kids would benefit more from a group-based social skills intervention that specifically integrated interacting with peers,” Kang said. People in this group had the highest percentage of wanting a friend, but difficulty with relating to peers.

“They will benefit especially from interventions that help them build skills in interacting with peers,” she explained.

She also suggested that the best way to make a reliable diagnosis is to collect as much information as possible, which could include observations and electrophysiological data.

Kang acknowledged that some of the responses from the parents or teachers of people with autism contain bias. “There can be a lot of potential especially in terms of these subjective measures,” she said.

Indeed, through Lerner’s lab, Kang has been trying to include more uses of neurological measures and other methodology that is less subject to biases.

“Hopefully, by looking at these more objective measures, we can help integrate information from these different levels,” she said.

A resident of East Northport, Kang lives with her husband, musician Sungwon Kim, who works as a freelancer on Broadway musicals. The couple, who have a young son, met in Boston when she was working at Boston Children’s Hospital and he was a student at Berklee College of Music. 

Kang’s first experience with autism was in high school, when she acted as a mentor to a second grader. When she entered college at the University of California at Berkeley, she studied molecular and cellular biology and psychology.

Lerner said that Kang is a “truly remarkable young scholar” and is “among the best I’ve seen at her stage to be able to look at her clinical experiences, which drive the questions that strike at the core of how we understand and treat autism.”

Lerner appreciates how she is driven to understand autism from neurons in the brain all the way up to the classification and treatment.

“She is somebody who is completely undaunted by taking on new questions or methodologies because she has an idea of what they’re going to mean,” Lerner said. “She has worked with [autistic children] and has tried to understand where they are coming from.”

Kang questions assumptions about what autism is, while also exploring its development.

“She is able to see and discover clinical strengths that manifest in the kinds of questions she asks,” explained Lerner. “She is a part of the next generation of where my field is going, and I hope we can catch up to her.”

Kang appreciates the work-life balance she has struck on Long Island, where she feels like the pace of life is “quiet and calm during the week,” while it’s close enough to New York City to enjoy the cultural opportunities.

From left, Hyunsik Kim, Associate Professor Matthew Lerner and Erin Kang. Photo from Lerner’s lab

By Daniel Dunaief

This is part one of a two-part series on autism research conducted by Hyunsik Kim and Erin Kang.

If someone in a family behaves in ways that are difficult to understand, the family might look for a support group of people with similar characteristics, visit a doctor or seek to document and understand patterns.

Finding a doctor who has seen these types of behaviors, speech patterns or actions before could provide comfort, as the physician may either engage in a course of treatment or provide context and understanding for the current behaviors. The doctor may also offer advice about any likely changes in behaviors in the near or distant future.

For researchers, understanding a range of symptoms, some of which might be below the threshold to meet a specific diagnosis, can lead to a more specific awareness of a condition, which could help guide patients toward an effective treatment.

Hyunsik Kim and Erin Kang, graduate students in the Department of Psychology at Stony Brook University, recently published papers examining autism, hoping to get a more specific understanding of subtle differences and symptoms.

Kim was looking for a better way to conceptualize autism. He used advanced statistical methods to compare three theoretical perspectives to find the one that best characterized the symptoms.

“According to my study, autism is not an all-or-nothing phenomenon, but is dimensional [and is] comprised of three related spectra of behaviors,” he explained. 

Researchers can characterize everyone’s autism symptoms through a combination of levels in each domain.

Each of these three areas can range from very mild to severe.         As an analogy, Kim suggested considering the quality of being introverted. A person can be mildly, moderately or highly introverted, which offers a continuum for the dimension of introversion.

In a dimensional approach that involves exploring these three different categories, researchers can get a better understanding of the symptom profiles.

“For decades, people thought of autism as purely categorical,” said Matthew Lerner, an associate professor of psychology, psychiatry and pediatrics in the Department of Psychology at Stony Brook University. “You either have it or you don’t. In fact, autism was thought of as the easiest diagnosis to make.”

Kim, however, has “a goal of answering the fundamental question: what are we talking about when we’re talking about autism?” Lerner said. “Slowly, autism has morphed from the most categorical to the most dimensional. Literally, people talk about the spectrum when they talk about autism.”

With a dimensional approach based on levels of the three major domains for diagnosing autism, Kim suggested that researchers and doctors could better understand people who fall just below the current diagnosis for autism.

“It’s especially important to identify individuals who show a borderline range of symptoms, who barely fail to meet the diagnostic criteria of a given disorder, and provide them with appropriate treatments,” Kim explained.

Ideally, he hopes a dimensional approach incorporates the severity of symptoms into the current diagnostic system to promote better treatment procedures and outcomes.

Kim recognized that he could have just as easily created a dimensional approach that incorporates a greater number of criteria. His statistical analysis, however, revealed that the three dimensions provide the parsimonious explanation about autism symptoms.

Kim analyzed data from a parent questionnaire. He recognized that self-reporting by parents may underestimate or overestimate the severity of symptoms. He believed the over and under estimate of symptoms likely “evened out.”

Lerner suggests this multidimensional approach has numerous implications. For starters, it can help capture more of the types of symptoms in a diagnosis. It can also highlight the specific area of autism a clinician might want to target.

“We should be focusing on the factors that are most relevant for the individual and which are getting in their way,” Lerner said.

Treating autism broadly, instead of focusing on specific symptoms, may be “misguided,” Lerner added. A more specific characterization of autism could also help advance the field of neurogenetic research. “With more contemporary genetic analysis, we can use findings like this as a road map for what those genetic differences mean,” he said.

For his next step, Kim hopes to expand this work to observational data, adding that to the existing pool of information from parental questionnaires.

“People go on a home visit and take video of autistic kids interacting with others,” Kim said. “We can have some people code their behavior.”

More broadly, Kim would like to answer fundamental questions about the classification and conceptualization of mental disorders by using advanced quantitative modeling and other data-driven approaches. He believes a factor may represent a person’s vulnerability to developing a specific mental disorder.

A high level of this factor, combined with life stressors or adversity, would make it more likely that a person develops a disorder. As someone who studies psychology, Kim said he is well aware of his own emotional patterns and he tries to use his training to help himself cope.

He is not particularly comfortable doing public speaking, but he tells himself that whatever anxiety he feels is normal and that his practice, knowledge and expertise should allow him to succeed.

A resident of Middle Island, Kim lives with his wife Jennifer. The couple has two young children. Kim describes his wife as a “really good” amateur baker, who bakes cakes, muffins, cookies, macaroons, chiffon cakes and more. He has encouraged her to start her own YouTube channel and one day they hope to open a bakery that is online and offline.

As for his autism work, he hopes the dimensional approach is “incorporated into the assessment stage so that individuals do not merely receive a diagnosis, but are informed of their unique symptom profiles, so that clinicians can take them into consideration.”