Chimerism is what happens when cells from one twin are present in the other. For example, white blood cells with Y chromosomes would be found in the female twin.
: of, relating to, or involving conscious mental activities (such as thinking, understanding, learning, and remembering). cognitive development/psychology/impairment. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples.
1 Definition. 1  Cognitive tools refer to learning with technology (as opposed to learning through technology). 2  Jonassen (1994) argues that â technologies, from the ecological perspective of Gibson (1979), afford the most meaningful thinking when used as toolsâ . Cognitive tools have two kinds of important cognitive effects, those which are with the technology in terms of intellectual partnerships and those that are of the technology in terms of the cognitive residue that remains after the tools are used.