[The subject is shown pictures of a a log, a saw, an axe and a hammer and asked to select the one that does not go with the other three] 'They're all alike. I think all of them have to be here. See, if you're going to saw, you need a saw, and if you have to split something you need a hatchet. So they're all needed here.' 'Which of these things could you call by one word?' 'How's that? If you call all three of them a 'hammer', that won't be right either.' 'But one fellow picked three thingsthe hammer, saw, and hatchetand said they were alike.' 'A saw, a hammer, and a hatchet all have to work together. But the log has to be here too.' 'Why do you think he picked these three things and not the log?' 'Probably he's got a lot of firewood, but if we'll be left without firewood, we won't be able to do anything.' 'True, but a hammer, a saw, and a hatchet are all tools.' 'Yes, but even if we have tools, we still need woodotherwise, we can't build anything.' (Luria, 1976) |
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