Featured Post from Baylor University

Sleep Better, Live Better: Improving Sleep Quality Can Lead to Less Stress and Improved Cognition

Mar 5, 2024

4 min

Michael Scullin, Ph.D.


Research has demonstrated that increased stress and all-night study sessions can lead to lower cognitive functioning and test scores, adding even more pressure on college students. Baylor sleep expert Michael K. Scullin, Ph.D., director of Baylor University’s Sleep Neuroscience and Cognition Laboratory and associate professor of psychology and neuroscience, studies how cognitive and behavioral processes are affected by sleep.


“Sleep deprivation makes life worse. And it makes the person not getting enough sleep worse at life,” Scullin said. “However, if we focus on improving our sleep, life will get better, and we will get better at life.”


Poor sleep is particularly common when students are studying for exams or working on major projects for classes. The combination of staying up late, cramming for tests, increased stress and bright light exposure late at night can lead to variable sleep durations and higher stress levels.


“We know that as you accumulate sleep debt, whether it's from a single all-nighter or from weeks of variable sleep durations, it can exacerbate any pre-existing vulnerability a person may have to stress,” Scullin said. “For instance, if someone has a predisposition to panic attack disorder, sleep deprivation can increase panic attacks by about 40%. This applies to virtually any clinical or subclinical condition, whether it’s stress-related or not – sleep deprivation makes it worse.”


Scullin added that even with a slight sleep deficit, any sort of negative event, such as a bad grade on a test, will feel much worse than it would for someone who is well-rested.


“It becomes a cycle, and the individual begins to focus on what is worse instead of calming down at night and getting ready to fall asleep,” Scullin said.


So how can a student – or any individual – break this cycle? It all starts with developing healthy sleep habits, which reduce stress and improve academic performance.


Scullin suggests students try three Challenges to improve their sleep, mood and stress regulation.


1. Illuminate! Challenge

One class activity that Scullin has used with students for years is called the Illuminate! Challenge, which focuses on students adding more natural sunlight to their lives in the morning hours.


“About 90% of students do not know that we need natural sunlight daily in the morning to tell our internal biological clock when to start ticking. When our biological clock knows it's time to start ticking, it will make us feel more alert, which helps improve our mood,” Scullin said.


Specifically, he suggests:

  • Spending 20 minutes daily outdoors in natural daylight during the morning hours.
  • Be intentional with this time as something aside from walking to class or other daily routines.
  • Take the time when you would normally be inside studying or eating breakfast to go outside instead.


“Almost every one of my students who has taken this challenge has said their mood and alertness improved,” Scullin said.


2. Deluminator Challenge

The Deluminator Challenge eliminates light in your bedroom for a night of better sleep. Scullin said this challenge works by:


  • Turning off all the lights and counting the number of artificial lights that exist in your environment. How many of your plugs have lights? How much light is coming in through your curtains?
  • Cover up every light source (except fire alarms and other safety devices), including any light coming through windows. Blackout curtains are a good investment, or even using blankets to cover windows will help reduce light at night.
  • It’s easy to adopt this challenge as it is sustainable once it is set. You will find that you can fall asleep easier and enjoy sleeping later in the morning because of the darker environment.


“What normally happens is students see their devices are emitting unnatural light, and it is not nearly as dark as it should be,” Scullin said. “A lot of students in my classes report that this is their favorite challenge because it led to the biggest impact on sleep quality.”


3. Anti-Rumination Challenge

Lying in bed thinking about everything you need to do the next day can increase stress levels and interrupt sleep. In a recent study, Scullin found that taking five minutes to write a “to-do” list at bedtime helped student participants fall asleep about 10 minutes faster than others who used that time to chronicle completed activities:


  • Take five minutes to write down a to-do list of everything that needs to be done the next day.
  • The to-do list offloads stress, gives you a good action plan for the next day and helps you feel accomplished as you check off the goals.
  • When people get more sleep – even just one more hour of sleep per night – “they literally become happier,” Scullin said. That extra hour of sleep can improve social relationships, emotional reactions and cognitive functioning. With improved cognitive functioning comes improved academic performance.


“Adding more sleep to your life makes life better, and it's going to make you better at life. It's going to resolve some of the stress, and you're going to better handle events that are inherently stressful. You're going to enjoy life while you're also taking classes. And you know what? Your grades are probably going to improve.”

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Michael Scullin, Ph.D.

Michael Scullin, Ph.D.

Associate Professor of Psychology and Neuroscience

Nationally recognized sleep expert exploring the connections between sleep physiology, memory, education, health & aging

Sleep Neuroscience and CognitionCognitive NeuroscienceSleep Physiology

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