BLT and Safety
Our tests for human performance are vital tools for ensuring safety in dangerous workplace environments. Used with good shift management and scheduling the BLT test provides another level of protection against fatigue and human impairment.

We have entered the smart phone/tablet world with an application that runs on both the iOS and Android platforms. Please see: Alertometer.

The tests are graphic, non-linguistic exercises designed to be enjoyable. They have been rigorously researched in clinical and field trials.

All BLT systems are patented. Research is funded by the CDC through National Institute for Occupational Safety and Health (NIOSH) and the National Institutes of Health (NIH).

Job Safety News

Nuclear Fatigue and the NRC

Think of the nuclear power industry and you think of controlled risk, of operators in huge control rooms monitoring dials and computer screens, all day every day, until something happens. And nothing much happens – a perfect formula for the conditions that promote fatigue and inattention. The Nuclear Regulatory Commission “NRC” is deeply concerned with […]


I am just going to quote this in full. Thank you DDC. Inattention and Fatigue Primary Causes of Workplace Accidents Jessica Walter, DDC Command Affairs During a recent Defense Distribution Center (DDC) Safety and Occupational Health Council meeting, DDC Safety Manager Dave Mack revealed the root cause of most workplace accidents: inattention and fatigue. According […]

We Don’t Want to Know (!)

We have had many meetings with top safety managers at some of the world’s leading operating companies. These men, and women, are immensely interested in impairment testing. They are well aware of how fatigue and impairment can undermine safety and, incidentally, the bottom line. But, occasionally, we get an astonishing reaction. “We do not want […] is Alive!

We have just introduced AlertnessCentral – our new alertness testing site. (You need a password to access the system.) Before we introduced our alertness system on the web, we wanted to be sure quality would not be compromised. We were concerned about data privacy and with security. We also wanted to be sure that test […]

Overtime Risks

The following is straight from Circadian Technologies’ news email. More Evidence on the Risks of Overtime Research from the University of Massachusetts shows a strong link between working overtime and sustaining a work-related injury. This was found to be true for all occupations, not just those that were physically demanding or in dangerous industries. Of […]