## 1 Introduction  
The article aimed to determine the effectiveness of visual confirmation when pointing out prohibited items during the analysis of images overexposed with an X-ray device. Obtaining appropriate effectiveness will allow the system on which airport security control operators work every day to be expanded. As a result of the work, the accuracy of the determined evaluation indicators of security control operators is expected to increase.  
In their day-to-day work, security control operators are tasked with identifying items not authorized for air transportation. The most significant restrictions apply to the carriage of cabin baggage. A detailed list of items that should be determined by screening operators is specified in ref. [1]. For example, items prohibited for carriage in cabin baggage are divided into six main groups:  
* guns, firearms, and other devices that discharge projectiles;
* stunning devices;
* objects with a sharp point or sharp edge;
* workmen's tools;
* blunt instruments;
* explosives and incendiary substances and devices.  
Each group mentioned above has detailed descriptions that specify the scope of restricted items [1].  
The security control operator is evaluated continuously by collecting statistics, which also evaluate the effectiveness of detecting prohibited items. A Threat Image Projection (TIP) system is built into X-ray devices. The concept of the TIP system is to create images with artificial threats that the security control operator must indicate. A library of FTIs (Fictional Threat Images) is used for cabin luggage. FTIs are superimposed by the IT system on actual luggage carried by passengers. When screening checked baggage, a library of CTIs (Combined Threat Images) is deployed. In this case, crafted whole images where a prohibited object is placed are woven into the stream of authentic images. Due to the need for a highly efficient security screening process at airports, X-ray machines only provide the ability to trigger a threat detection alarm by physically pressing a button on the machine's console. Triggering an alarm triggers functions to check whether it is an image containing a CTI or FTI. The operator does not physically indicate the area in the image where he or she believes the prohibited object is located. This results in the operator's effectiveness needing to be evaluated correctly. The operator may consider an image a threat with an object in mind that is not a prohibited object. If a TIP is superimposed on this image, the system will assume the operator's knowledge to be correct. This adversely affects the accuracy of the operator's assessment of the screening's effectiveness. The scientific literature has clearly indicated that there is currently a problem with training and evaluating the work of operators. As a result, an operator for as long as the first 6 months of work may perform his duties without adequate knowledge [2].  
Research in this area has not yet been conducted in the scientific literature. This article presented data to estimate the scale of the problem and point to a potential solution. The use of eye-tracking technology to eliminate this problem was proposed. The paper is a scientific contribution to improving the accuracy of screening operators' assessments and was carried out based on the authors' research using a developed proprietary training simulator.  
The article is structured as follows. Section 2 presents the current state of knowledge about the evaluation models of security control operators and the systems that support their work. Section 3 presents the research results. Section 4 presents a summary of the study conducted.