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Deploying the Mental Eye

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ABSTRACT

Three observers performed a task designed to quantify their “pictorial relief” in visual awareness for a photograph of a piece of sculpture. In separate sessions, they were instructed to assume one of two “mental viewpoints.” The main objective was to investigate whether human observers have such command. All three observers could redirect their “mental view direction” by up to 20°. These observers experience “paradoxical monocular” stereopsis, whereas a sizable fraction of the population does not. Moreover, they had some experience in assuming various “viewing modes.” Whereas one cannot generalize to the population at large, these findings at least prove that it is possible to direct the mental viewpoint actively. This is of importance to the visual arts. For instance, academic drawings require one to be simultaneously aware of a “viewing” (for the drawing) and an “illumination direction” (for the shading). Being able to mentally deploy various vantage points is a crucial step from the “visual field” to the “visual space.”

No MeSH data available.


Scatterplots for the depths at corresponding locations obtained in the two viewing modes. This is for participant AD; the plots for the other participants look very similar.
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fig6-2041669515607710: Scatterplots for the depths at corresponding locations obtained in the two viewing modes. This is for participant AD; the plots for the other participants look very similar.

Mentions: In Figures 6 and 7, we illustrate the case for participant AD. Similar plots for the other participants look essentially similar. In the raw representation, the correlation for comparisons is low (coefficient of determination .28), whereas it turns out to be quite high (coefficient of determination .83) in a suitable gauge. Notice that the corresponding contour plots for the depth look very different.Figure 6.


Deploying the Mental Eye
Scatterplots for the depths at corresponding locations obtained in the two viewing modes. This is for participant AD; the plots for the other participants look very similar.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2 - License 3
Show All Figures
getmorefigures.php?uid=PMC5016826&req=5

fig6-2041669515607710: Scatterplots for the depths at corresponding locations obtained in the two viewing modes. This is for participant AD; the plots for the other participants look very similar.
Mentions: In Figures 6 and 7, we illustrate the case for participant AD. Similar plots for the other participants look essentially similar. In the raw representation, the correlation for comparisons is low (coefficient of determination .28), whereas it turns out to be quite high (coefficient of determination .83) in a suitable gauge. Notice that the corresponding contour plots for the depth look very different.Figure 6.

View Article: PubMed Central - PubMed

ABSTRACT

Three observers performed a task designed to quantify their “pictorial relief” in visual awareness for a photograph of a piece of sculpture. In separate sessions, they were instructed to assume one of two “mental viewpoints.” The main objective was to investigate whether human observers have such command. All three observers could redirect their “mental view direction” by up to 20°. These observers experience “paradoxical monocular” stereopsis, whereas a sizable fraction of the population does not. Moreover, they had some experience in assuming various “viewing modes.” Whereas one cannot generalize to the population at large, these findings at least prove that it is possible to direct the mental viewpoint actively. This is of importance to the visual arts. For instance, academic drawings require one to be simultaneously aware of a “viewing” (for the drawing) and an “illumination direction” (for the shading). Being able to mentally deploy various vantage points is a crucial step from the “visual field” to the “visual space.”

No MeSH data available.