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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.


Related in: MedlinePlus

The reliefs shown in Figure 7 transformed to the gauge of the other mode. Note that this neatly reproduces the direct measurements. The reliefs from the two modes are fully equivalent and differ only through some mental movement.
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fig8-2041669515607710: The reliefs shown in Figure 7 transformed to the gauge of the other mode. Note that this neatly reproduces the direct measurements. The reliefs from the two modes are fully equivalent and differ only through some mental movement.

Mentions: In Figure 8, we show the results for Modes I and II, observer AD, back transformed. One should compare these plots with the ones in Figure 7. It is evident that the reliefs for the two modes are indeed equivalent and can simply be transformed into each other with a suitable gauge transformation.Figure 8.


Deploying the Mental Eye
The reliefs shown in Figure 7 transformed to the gauge of the other mode. Note that this neatly reproduces the direct measurements. The reliefs from the two modes are fully equivalent and differ only through some mental movement.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

fig8-2041669515607710: The reliefs shown in Figure 7 transformed to the gauge of the other mode. Note that this neatly reproduces the direct measurements. The reliefs from the two modes are fully equivalent and differ only through some mental movement.
Mentions: In Figure 8, we show the results for Modes I and II, observer AD, back transformed. One should compare these plots with the ones in Figure 7. It is evident that the reliefs for the two modes are indeed equivalent and can simply be transformed into each other with a suitable gauge transformation.Figure 8.

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.


Related in: MedlinePlus