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Use "externalisation" in a sentence
"A typical form of externalisation is when you select and drag an item on an interface and it shows where you can drop it by highlighting areas as you move over them."
"The poor currently do not benefit from the "externalisation" of electricity prices because they do not use enough electricity."
"They asked users to solve a reasonably complex puzzle involving moving different coloured balls between two boxes using a small dish, and built two versions of the game program, one of which offered more guidance to the user – involved more externalisation – than the other."