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Sigmund Exner ’ s (1887) Einige Beobachtungen ü ber Bewegungsnachbilder (Some Observations on Movement Aftereffects): An Illustrated Translation With Commentary

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ABSTRACT

In his original contribution, Exner’s principal concern was a comparison between the properties of different aftereffects, and particularly to determine whether aftereffects of motion were similar to those of color and whether they could be encompassed within a unified physiological framework. Despite the fact that he was unable to answer his main question, there are some excellent—so far unknown—contributions in Exner’s paper. For example, he describes observations that can be related to binocular interaction, not only in motion aftereffects but also in rivalry. To the best of our knowledge, Exner provides the first description of binocular rivalry induced by differently moving patterns in each eye, for motion as well as for their aftereffects. Moreover, apart from several known, but beautifully addressed, phenomena he makes a clear distinction between motion in depth based on stimulus properties and motion in depth based on the interpretation of motion. That is, the experience of movement, as distinct from the perception of movement. The experience, unlike the perception, did not result in a motion aftereffect in depth.

No MeSH data available.


Exner’s Experiment 4 showing both interocular transfer and retinal localization of the MAE.
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fig4-2041669515593044: Exner’s Experiment 4 showing both interocular transfer and retinal localization of the MAE.

Mentions: 4. If one fixates the center of the moving drum (or a suitable marker placed just in front of it) with the right eye for a minute, subsequently stops the drum, and closes the right and opens the left eye at the same time, a negative movement aftereffect is experienced in the latter eye at the fixated lines. The experiment becomes really convincing if one has fixated a point on the upper border of the drum with the right eye and at then looks at the middle (at half height) of the stopped drum with the left eye. It then appears that only the lower parts of the lines undergo the aftereffect, the upper parts remain at rest (Figure 4).Figure 4.


Sigmund Exner ’ s (1887) Einige Beobachtungen ü ber Bewegungsnachbilder (Some Observations on Movement Aftereffects): An Illustrated Translation With Commentary
Exner’s Experiment 4 showing both interocular transfer and retinal localization of the MAE.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2 - License 3
Show All Figures
getmorefigures.php?uid=PMC5016818&req=5

fig4-2041669515593044: Exner’s Experiment 4 showing both interocular transfer and retinal localization of the MAE.
Mentions: 4. If one fixates the center of the moving drum (or a suitable marker placed just in front of it) with the right eye for a minute, subsequently stops the drum, and closes the right and opens the left eye at the same time, a negative movement aftereffect is experienced in the latter eye at the fixated lines. The experiment becomes really convincing if one has fixated a point on the upper border of the drum with the right eye and at then looks at the middle (at half height) of the stopped drum with the left eye. It then appears that only the lower parts of the lines undergo the aftereffect, the upper parts remain at rest (Figure 4).Figure 4.

View Article: PubMed Central - PubMed

ABSTRACT

In his original contribution, Exner’s principal concern was a comparison between the properties of different aftereffects, and particularly to determine whether aftereffects of motion were similar to those of color and whether they could be encompassed within a unified physiological framework. Despite the fact that he was unable to answer his main question, there are some excellent—so far unknown—contributions in Exner’s paper. For example, he describes observations that can be related to binocular interaction, not only in motion aftereffects but also in rivalry. To the best of our knowledge, Exner provides the first description of binocular rivalry induced by differently moving patterns in each eye, for motion as well as for their aftereffects. Moreover, apart from several known, but beautifully addressed, phenomena he makes a clear distinction between motion in depth based on stimulus properties and motion in depth based on the interpretation of motion. That is, the experience of movement, as distinct from the perception of movement. The experience, unlike the perception, did not result in a motion aftereffect in depth.

No MeSH data available.