Effectiveness of computer-based training for improving detection of Improvised Explosive Devices by screeners is highly dependent on the types of IEDS used during training

Several previous studies have shown that threat detection performance of X-ray operators can be increased substantially if computer-based training (CBT) is used. This applies particularly to objects that are never or rarely encountered at a security checkpoint as for example Improvised Explosive Devices (IEDs). However, little is known so far about the importance of using different types of IEDs in CBT such as conventional, unconventional and inert IEDs. Conventional IEDs are made with real explosive and conventional detonators with a primary and secondary charge. Unconventional IEDs are made with real explosive and unconventional detonators that do not contain a primary charge. Inert IEDs are made with explosive stimulants and fake detonators.