The internal mechanisms of locks are generally made of brass or die-cast zinc. The cam, which is the tongue that protrudes from the lock to secure it, is usually made of steel or stainless steel. The outer casing of a lock may be made of brass, chrome, steel, nickel or any other durable metal or alloy.
From Wikipedia, the free encyclopedia. Cognitive tests are assessments of the cognitive capabilities of humans and other animals. Tests administered to humans include various forms of IQ tests; those administered to animals include the mirror test (a test of visual self-awareness) and the T maze test (which tests learning ability).
Researchers say the at-home test could be more effective in detecting early symptoms of cognitive decline than a standard office visit, as doctor's often can't observe subtle cognitive impairments during a brief visit. Missing 6 or more points on the test means there should be additional medical follow-up.