Valutazione scolastica e fenomeni a doppia soglia

The author proposes a ‘double threshold’ explanation of the persistence of teachers’ evaluation of pupils, based on prior experience, as an alternative to the ‘halo effect’ known in psychology, and describes a simple double threshold mechanical device that illustrates the concept and the analogy.

Numero: Anno XLI - n.1 - gennaio/marzo 2008

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