Alertness Testing by BLT

A quick test for alertness? We have that. Let us know what you need for your worksite or group.

That remains true but Bowles-Langley Technology, Inc. has now merged with Predictive Safety, LLC. Together we can offer our customers significant new resources and support. Please check the contacts page for inquiries and support.

Recent News


The Long Drive Home

The case has taken a long time but it is finally reaching its conclusion. The judge’s ruling could initiate significant reforms. Not the best way to change a system, but one way. While we stress the importance of pre work testing, it may be that post work testing is even more important. In some jobs […]


O Rings and Friendly Fire

Does sleep deprivation cause accidents? Of course not. But it is often a contributing cause. Too often. Could testing help reduce these kinds of accidents? In some cases – yes, it certainly could. A culture of awareness and responsible testing could have helped in the Challenger accident. On the battle field, I am not so […]


Shapes Used for a Test

Our entry of 2/5/05 spoke about the use of visual challenges for alertness testing. In response to requests for examples of shapes used in the BLT Alertness Test, here are a few. Obviously, these are very simple images, but they are sufficiently challenging when presented in groups of similar images (each row represents a similar […]


New Tests

The basic BLT Alertness test uses a set of shapes on the white squares of a small checkerboard. The challenge is to determine if all the shapes are the same or not. Since some of the shapes look similar and are randomly rotated, it can be difficult to tell if they are actually all the […]


A Pill for Alertness?

I talk a lot about alertness and its importance to safer work. And we emphasize getting enough sleep and eating properly. But what if it turns out that a simple pill will keep you alert? What if a pill can improve your memory? Well it seems, such medications are not that far away. In a […]

BLT is a unique company dedicated to providing new solutions for assessing human performance. Our technologies draw on a wide range of management experience and scientific knowledge to provide customers with solutions that are practical, understandable and useful.