With the assistance of Terrace L.Waggoner, Renful has developed PRE-M Pre-Employment & Colour Vision Test for X-ray.
Pre-M addresses the need to pre-select suitable people for X-ray employment, by means of exposure to interactive tests available on the Simfox system. There are currently 8 different tests which will assist in the selection of candidates under a variety of criteria; these consist of the following areas:
Colour blindness deficiency: by displaying a number of visual images, Pre-M can test for people who have this deficiency.
Geometrical Pattern Recognition. In this test, the ability to identify everyday objects displayed under x-ray conditions will be assessed. The candidate will be presented with a number of slides containing everyday objects which must be identified by comparison to a true photograph of the item.
Viewpoint Variation. This tests the ability to identify objects displayed under x-ray conditions and rotated from the 'normal' viewpoint. Candidates are presented with a number of slides containing objects which need to be matched to the same object in a different orientation.
Bag complexity. This test is for the identification of suspicious/ restricted objects contained within complex bag images.
Overlay complexity. This test is for the identification of suspicious/ restricted objects obscured by other objects contained within bag images. The complexity of the bag is gradually reduced by the removal of items over time. The challenge of the test is to identify the object in an opaque or obscure situation.
Colour Blind Facts
Colour blindness (colour vision deficiency) is a condition in which certain colours cannot be distinguished, and is most commonly an inherited condition.
Red/Green colour blindness (distinguishing reds and greens) is the most common form, about 99% of sufferers experience this type. Another colour deficiency Blue/Yellow also exists but is rare, with no commonly available test for it.
Depending on which figures you believe, colour blindness occurs in about 8% - 12% of males of European origin and about 0.5% of females. Total colour blindness (vision in shades of grey) is rare.
There is no treatment for colour blindness, nor is it usually the cause of any significant disability, but it can be very frustrating for effected individuals, and does keep one from performing certain jobs and makes others difficult.
Examples of effected professional tasks: Reading maps: the colour coding on the legends. Bi-color and tri-color LEDs (Light Emitting Diodes): Is that glowing indicator light red, yellow, or green? Traffic lights, and worst of all, Caution lights. Test strips - interpret chemical reactions, litmus paper turned red by acid, swimming pool water test kits , test strips for hard water, soil or water pH tests - all rely on subtle differences between similar colours.
The Test
Students will be presented with a number of slides containing numeric values. To complete the task, the student must enter the number they see in the circle in the entry box provided then click the 'Next' button to proceed.
