Performance Under Trouble Owing to Sleep Deprivation

Lack of sleep can impact the performance of certain tasks despite how tired you perceive yourself to be, reveals a new study.

"Our team decided to look at how sleep might affect complex visual search tasks, because they are common in safety-sensitive activities, such as air-traffic control, baggage screening, and monitoring power plant operations," explained Jeanne F. Duffy, PhD, MBA, senior author on this study and associate neuroscientist at Brigham and Women's Hospital (BWH).

About Sleep Disorder
Sleep disorders can either be having difficulty in getting sleep or dozing off at inappropriate time.

"These types of jobs involve processes that require repeated, quick memory encoding and retrieval of visual information, in combination with decision making about the information," Duffy said.

Researchers collected and analyzed data from visual search tasks from 12 participants over a one-month study.

In the first week, all participants were scheduled to sleep 10-12 hours per night to make sure they were well-rested. For the following three weeks, the participants were scheduled to sleep the equivalent of 5.6 hours per night, and also had their sleep times scheduled on a 28-hour cycle, mirroring chronic jet lag.

About Sleep Disturbances
The physical, emotional and hormonal changes that occur in women during puberty, menstrual cycle, pregnancy, and menopause can cause Sleep Disturbances

The research team gave the participants computer tests that involved visual search tasks and recorded how quickly the participants could find important information, and also how accurate they were in identifying it.

The researchers report that the longer the participants were awake, the more slowly they identified the important information in the test. Additionally, during the biological night time, 12 a.m. -6 a.m., participants (who were unaware of the time throughout the study) also performed the tasks more slowly than they did during the daytime.

Sleep Disorders in Children - Overview, Types, Diagnosis, Management
Sleep disorders are problems in sleep that meet diagnostic criteria for a disorder. They include insomnia, obstructive sleep apnea, parasomnias and narcolepsy.

"This research provides valuable information for workers, and their employers, who perform these types of visual search tasks during the night shift, because they will do it much more slowly than when they are working during the day," Duffy said.

"The longer someone is awake, the more the ability to perform a task, in this case a visual search, is hindered, and this impact of being awake is even stronger at night," Duffy said.

Sleeping Disorders
How many times have you stayed awake in the dead of the night counting sheep? If it is fairly often then you could be suffering from a sleep disorder!

While the accuracy of the participants stayed the fairly constant, they were slower to identify the relevant information as the weeks went on.

The self-ratings of sleepiness only got slightly worse during the second and third weeks on the study schedule, yet the data show that they were performing the visual search tasks significantly slower than in the first week.

This finding suggests that someone's perceptions of how tired they are do not always match their performance ability, explained Duffy.

This study was recently published in the online edition of The Journal of Vision.

Source-ANI