THE GLASS FILLED TO HALF (April 2002).

This is the more diffused and " puzzling " example about how the same thing, a filled glass to half, as that in the photo below, can be seen as " a half-full glass " from about the 80% of the persons asked to say what they are seeing. To the same question, about 20% remainders, answer to see " a half-empty glass ".

Of course there is nothing of puzzling if we agree the suggestion of the opposite engram presence, into the not dominant half-brain. Moreover, we need also to agree the difficulty some people have in suppressing it, a fact that happens in one person out of five. In this specific case the glass space, as a container, is perceived respectively as "half-full" or "half-empty", confirming how the prevalence of the opposite half-brain may happen, even in not pathological conditions, linked to specific brain areas, or structures, or functions .

The difference in the perceptive stress as for our glass, comes as attributed to the real world, bringing to think as characteristic of the seen object, something that is only an intra-brain event. In our example there is not any emotional connotation, even a negative one, a fact that would more easily explain a prevalence of the not dominant half-brain.

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