The "mental step" hypothesis in solving verbal problems: Effects of variations in question-phrasing on a grade school population.
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2000 ◽
Vol 21
(1)
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pp. 88-91
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2002 ◽
Vol 109
(1)
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pp. S210-S210
1977 ◽
Vol 41
(9)
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pp. 573-574
1984 ◽
Vol 48
(4)
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pp. 208-210
2000 ◽
Vol 16
(3)
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pp. 32
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