Computer Based Training
and performance standards. CBT can
also allow trainers to control access to
particular training material, which can
be useful for structuring the training
given.
To that end it is clear that CBT has
a number of benefits over alternative
forms of training and may provide
a cost-effective training solution.
CBT systems have been shown to
reduce the ‘time to competency’
and so reduce costs of training. A
recent study indicated that 3hrs of
CBT training was superior to 8hrs of
conventional training for procedural
and perceptual-motor tasks.
However, it is important to consider
not just the initial outlay but costs of
maintenance and software updates.
Additional costs include training
system administrators and instructors
to use the system, and ensuring that
they are available during training to
deal with any problems encountered.
The relative costs of alternative
training media, the overall value of
the training and staff turnover levels
should be taken into account when
making a decision about the optimum
use of CBT.
ICTS’ Eagle in classroom setup
Features of a Good CBT
System should include links between theory of objects from different angles and
Although the optimal features and practice, for example descriptions with different enhancement functions
of a CBT system will depend on of particular features of X-ray images applied should be provided, with
the specific function for which it is accompanied or followed by an explanations and descriptions
required, there are some principles of X-ray image to illustrate the features. of threat items, advice on how to
best practice which can be applied. Exercises and interactive sessions that spot them, and any information on
As with other training media, the require trainees to actively participate associated concealment strategies.
design of a CBT system should be are all important in achieving required Information on colour representation,
based on a thorough analysis of the competencies. Multiple choice density representation, and the
task, the operating conditions for that questions with explanatory feedback significance of different shapes and
task, and the necessary performance are an effective means of assessing sizes should be available alongside
standards required. and developing knowledge using CBT. information on how to use zoom and
Computer based instruction Dialogue and navigation should be enhancement functions optimally.
should incorporate well organised standardised across the modules and A simulation of the X-ray screening
courseware with menus, modules, easy to use, with accessible help and task should give trainees practice
and units. The sequence of delivered guidance facilities. Instructor controls that incorporates all the operationally
information should build knowledge (if used) and training records also need important aspects of the task. The
in a logical order including adequate to be user friendly. feedback they receive should include
repetition and elaboration of the key An image library on the CBT not just information about whether
facts. At the start of the lessons, system, which should include a range they were right or wrong but also
objectives should be explicitly stated of threat and non-threat items and some explanation of why this was the
to ensure trainees focus on important is accessible to trainees, is a useful case, and information on the location
learning outcomes, and that they are facility. Trainees should be able to and type of threat contained in the
aware of the standard they need to obtain detailed information from image. ‘After Action Review’ (AAR)
achieve as a result of their training. their CBT on components of threats facilities are another useful feature
Computer based instruction lessons and how to spot them, so X-ray views of CBT, as they enable the trainee
December 2009 Aviationsecurityinternational www.asi-mag.com 19
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