Featured Post from University of Delaware

Exploring the ripple effect: How teachers' emotions impact student engagement and learning outcomes

In a new study, about 10% of teachers displayed notable amounts of negative emotions — as much as 80% of their instructional time. The students of these teachers reported reduced enjoyment and engagement in class.

Mar 4, 2025

1 min

Leigh McLean

The classroom environment is a dynamic ecosystem where the emotional state of educators can significantly influence students' engagement and learning outcomes. 


In a new article published in Contemporary Educational Psychology, University of Delaware Associate Research Professor Leigh McLean offers a new tool—the Teacher Affect Coding System—for measuring teachers’ emotional expressions and studying how these expressions affect their students’ attitudes toward learning. With co-author Nathan Jones of Boston University, McLean uses this tool to gather new data showing emotional transmission between teachers and their students in fourth-grade classrooms.

CaptionResizeWrap TextRemove


In the study, McLean and Jones, found that teachers displayed far more positive emotions than negative ones. But they also found that some teachers—about 10%—displayed notable amounts of negative emotions, with some showing negativity during as much as 80% of their instructional time. The students of these teachers reported reduced enjoyment and engagement in their ELA classes and reduced engagement in their math classes.


Given the findings of their study, McLean and Jones make several recommendations for teacher preparation and professional learning programs. As a first step, they recommend that teacher preparation and professional learning programs share information about how negative emotions and experiences are a normal part of the teaching experience. As McLean said, “It’s okay to be frustrated!”


McLean is available for interviews on the study, the tool and how teachers can help mitigate this effect. Click on her profile to contact her. 

Connect with:
Leigh McLean

Leigh McLean

Associate Research Professor, Education

Prof. McLean investigates how teachers’ emotions and emotion-related experiences including well-being impact their effectiveness.

Developmental PsychologyInstructional PracticesTeachers and TeachingWell-BeingClassroom Behavior

You might also like...

Check out some other posts from University of Delaware

1 min

Study forecasted deadly flash flooding in Texas years ago

The catastrophic flooding of the Guadalupe River in Kerr County, Texas, took place at lightning speed, catching everyone off guard. But the University of Delaware's Jennifer Horney says the risk of flash flooding in the area has been increasing for more than two decades. Horney, an epidemiologist and disaster researcher at the University of Delaware, studied flash flooding in that specific area while at Texas A&M University. She can discuss the following: • This area of Central Texas was designated as “Flash Flood Alley” in 2005 by the Flood Safety Education Program. It has long had high risk from flash flooding, which have been predicted to increase in intensity. • Flash Flood Alley is the area along the Balcones Escarpment, with river valleys and steep limestone cliffs. Extreme rainfall events – the heaviest 1% of all events – have increased in frequency and magnitude by 30% since 1960. • Urbanization and population growth in this area put more people at risk and the annual number of flood fatalities in Texas typically exceeds that of all other states. Several gaps in public risk perception persist even as risks increase with few understanding the life-threatening risks of these events. To arrange an interview with Horney, visit her profile and click on the "contact" button; or contact UD media relations.

1 min

Pandemic deepened health gaps for people with disabilities, study finds

A new peer-reviewed study published in the American Journal of Preventive Medicine reveals that U.S. adults with disabilities experienced significant declines in preventive cardiovascular screenings during the COVID-19 pandemic — and continued to face cost-related barriers to care, even after accounting for economic disruptions. Using nationally representative data from more than 150,000 adults between 2019 and 2023, the study highlights how routine care like blood pressure, cholesterol and glucose screenings dropped most sharply for those with cognitive, physical, or multiple disabilities. Adults with disabilities were also more likely to report delaying or missing care due to cost. These findings underscore persistent health inequities and the urgent need for inclusive public health strategies, especially for populations already at greater risk for cardiovascular disease. Why it matters: Cardiovascular disease remains the leading cause of death in the U.S. Adults with disabilities face higher risks and more barriers to care — making consistent preventive screenings essential. This study offers the first detailed, post-pandemic national look at how different disability groups were affected, with implications for future policy and healthcare reform. For more information on the study and to speak to experts, contact mediarelations@udel.edu. 

1 min

Food is medicine, and this professor has the research to prove it

For more than 20 years, Dr. Allison Karpyn has worked to understand and address food insecurity in America and beyond — studying how communities access healthy food, how policy shapes those opportunities and how local partnerships can make meaningful change. A professor in the University of Delaware’s College of Education and Human Development and co-director of its Center for Research in Education and Social Policy, Karpyn has published extensively on topics including food deserts, healthy corner store initiatives, school nutrition programs and strategies to bring farmer’s markets to underserved areas. Her work, which blends rigorous research with community-based implementation, has appeared in leading journals such as Pediatrics, Preventive Medicine and Health Affairs. Karpyn has also worked directly with nonprofit organizations, government agencies and retailers to pilot and evaluate programs designed to increase access to high-quality food in low-income neighborhoods. Her focus is on actionable, data-informed solutions to persistent challenges — from childhood hunger to structural barriers in the food supply system. Now, Karpyn’s expertise is being tapped as part of Delaware’s new Food is Medicine Committee, a statewide initiative under the Delaware Council on Farm and Food Policy. The committee seeks to connect nutrition and health care to improve outcomes, lower costs and strengthen local food systems — goals that align closely with Karpyn’s career-spanning mission. For journalists exploring food policy, hunger, public health and the future of food access, Karpyn is a key source of insight, research and real-world perspective. She can be contacted by clicking her profile. 

View all posts
Powered by