Perceptual Blindness, also called Inattentional Blindness, is the common phenomenon of a person failing to perceive objects or actions that are in plain sight. Causes beyond just basic human psychology can include not having a mental framework prepared in advance to perceive the objects or actions (that is, not being ready for the unexpected); wishful thinking or denial (due to cognitive dissonance) that prevents someone from seeing what he or she would like not to exist; intense mental focus on certain features which can cause mental distraction in regards to others; or deliberate misdirection by another person.
Fortunately there are potential—though largely untested—
countermeasures to perceptual blindness. These include choosing one or more inspectors or security guards to be the generalist to examine the general scene without specific assigned detailed observational responsibilities; conducting training to improve observational skills; making relevant personnel aware of perceptual blindness issues and demonstrating perceptual blindness to them; using magicians to demonstrate misdirection and sleight-of-hand techniques; engaging in frequent mental “what if” exercises to better mentally prepare observers for the unexpected; and implementing countermeasures to groupthink, denial, cognitive dissonance, and wishful thinking.
There are serious implications for security guards
& safeguards inspectors, especially those who:
check security badges
watch video monitors
make daily rounds
operate safeguards equipment