Newsletter: Executive Function
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Q. What is Executive Function?
Executive function (EF) is an overarching or “umbrella” term that covers a number of very different but related cognitive functions, some broad and some specific.
EFs emerge at different times in the course of a child’s early development, beginning in infancy and continuing to develop throughout childhood and into young adulthood.
EFs are linked to different or overlapping regions in the brain. There are close associations between different EFs and the frontal lobes - the large portions of the front part of the human brain. For example, EFs may be designated as to whether they are “Hot” or “Cold” aspects of cognition:
“Cold” EFs, such as working memory, executive attention, and organizational skills, are often mediated by one region of the frontal lobe (dorsolateral prefrontal cortex).
“Hot” EFs, such as impulse control, response inhibition, and social cognition, are related to emotional and social skills, and often mediated by other frontal lobe areas (orbitofrontal or dorsomedial regions).
The influence of EF on a person’s overall functioning is arguably more important and fundamental to cognitive efficiency and real-world success than is an individual’s IQ. For example, very intelligent individuals can have very poor EFs and thus fail to succeed in important ways personally and in society, while less intelligent individuals who have exceptionally good EFs can function and succeed better than someone who has higher measured intelligence.
There are a number of commonly researched EFs that are also an important part of a clinical neuropsychological evaluation. Examples of some types of EF that are easily measurable using specific tests and experimental paradigms include:
Inhibitory Control: ability to hold back and not demonstrate a behavior inappropriate to the situation, and the ability to avoid distraction
Working Memory: ability to briefly hold information in mind briefly in order to take some action using that information. Working memory capacity and executive function share a common underlying executive attention component that is strongly predictive of higher-level cognition
Cognitive Flexibility: ability to shift ideas and actions in response to immediate circumstances
Verbal Fluency: ability to retrieve words on command from one’s internal dictionary of words
Planning and Organization: These later developing EFs enable a person to demonstrate a higher level of efficient processing and overall integration of information from all sensory modalities and deeper emotional circuits in the brain
Application of EF: A Real-world Example
Let’s imagine you have reserved a seat on an airplane and you are at the airport working on your laptop device while you wait to board when you hear an announcement that your flight has been cancelled. The EFs you must enlist to help you through this scenario include the following:
Inhibitory Control: the ability to refrain from inappropriate behavior in order to take appropriate and constructive action
Emotional Control: the ability to not lose your temper and argue with an unhelpful gate agent who will not assign you to another flight
Shifting Mental Set: the ability to make the change from working on your laptop to taking active and effective next steps that will enable you to reach an alternative solution and make the trip
Initiation of Action: the ability to begin a logical search for a customer service representative or ticket agent who can re-book your flight on the next available plane
Plan/Organize: the ability to take steps in an appropriate order, and efficiently pack up your laptop and move your luggage to the new departure gate
Working Memory: Once given new flight departure information, the ability to retain the new flight and gate numbers as you run to catch a plane just about to leave
Self-Monitor: the ability to keep track of your emotional and behavioral responses despite the unexpected stress
Introducing A PETIT STUDY Research Team Member!
Brandi A. Weiss, Ph.D. is the methodologist of the PETIT (Prematurity’s Effects on Toddlers, Infants and Teens) Study
Dr. Brandi A. Weiss is an Assistant Professor of Quantitative Research Methods in the Department of Educational Leadership at the George Washington University Graduate School of Education and Human Development (GSEHD). Dr. Weiss holds a Ph.D. in Measurement, Statistics and Evaluation, from the University of Maryland, College Park. She also holds an M.A. in Assessment, Measurement, and Statistics and a B.S. in Psychology from James Madison University. Her research interests involve methodological issues in latent variable modeling with a specific focus on structural equation modeling (SEM), data-model fit, scale development, and investigating methods of testing for interaction effects and non-linear relations.
Dr. Weiss has over a decade of experience working as a psychometric and statistical consultant. She has worked with clients across a wide array of disciplines including: audiology, business marketing, education, exercise science, human development, marine biology, medical sciences, neuropsychology, psychology, social work, and student affairs. Additionally, she has worked with a wide variety of assessment types ranging from large-scale University wide assessments, to item banking for computer-adaptive tests (CATs), to instrument and survey design, to conducting small-scale program evaluations.
“I first became interested in quantitative methodology when studying psychology as an undergraduate student. During this time I read many scholarly research articles that were published based on ‘marginal significance’, poorly measured constructs, and analyses that were inconsistent with research questions. The quality of research is extremely important for all stakeholders because it directly impacts the conclusions that can be drawn from that research. As a methodologist, I aim to improve the validity of research studies and to bridge the gap between methodological approaches and applied research.
I have been working with FNA and the PETIT study since October 2011. I greatly enjoy working with this wonderful team of researchers to help investigate longitudinal preterm outcomes.”
Advance online publication this month:
Gerner, G. and Baron, I. S. (online) Pregnancy Complications and Neuropsychological Outcomes: A Review. Child Neuropsychology. DOI: 10.1080/09297049.2014.910301.
Pregnancy complications elevate risk of associated adverse medical, socioenvironmental, and behavioral outcomes in children and have a substantial impact on neuropsychological functioning and mental health across the child’s lifespan. This review summarizes prevalent pregnancy complications and the associated psychological and neuropsychological findings, highlighting methodological challenges that have restricted investigations of these outcomes and identifying opportune areas for future study. The common pregnancy complications reviewed are: hypertensive disorders, diabetes, infection, and behavioral and environmental risk factors such as obesity and nutritional factors.
A PETIT Study poster entitled “Phonological Processing and Rapid Naming Differences in Late-Preterm Children at Age 6” first-authored by one of our student research volunteers, Kaitlin Riegler, is to be presented this month at the 12th Annual American Academy of Clinical Neuropsychology Conference in New York, NY.