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A sticker in German warning that the reader is being "video monitored". Even just the presence of an eye symbol on a sticker can be enough to change a person's behavior. The watching-eye effect says that people behave more altruistically and exhibit less antisocial behavior in the presence of images that depict eyes, because these images insinuate that they are being watched.
In physics, the observer effect is the disturbance of an observed system by the act of observation. [1] [2] This is often the result of utilising instruments that, by necessity, alter the state of what they measure in some manner. A common example is checking the pressure in an automobile tire, which causes some of the air to escape, thereby ...
The eye-contact effect is a psychological phenomenon in human selective attention and cognition. It is the effect that the perception of eye contact with another human face has on certain mechanisms in the brain. [1] This contact has been shown to increase activation in certain areas of what has been termed the ‘social brain’. [2]
The Pulfrich effect is the effect that covering one eye with transparent but darkened glass can cause purely lateral motion to appear to have a depth component even though in reality it doesn't; even a completely flat scene such as one shown on a television screen can appear to exhibit some three-dimensional motion, but this is an illusion ...
Impressions of several natural phenomena and the principles of some optical toys have been attributed to persistence of vision. In 1768, Patrick D'Arcy recognised the effect in "the luminous ring that we see by turning a torch quickly, the fire wheels in the fireworks, the flattened spindle shape we see in a vibrating cord, the continuous circle we see in a cogwheel that turns with speed". [8]
The psychic staring effect (sometimes called scopaesthesia) is the claimed extrasensory ability of a person to detect being stared at. The idea was first explored by psychologist Edward B. Titchener in 1898 after students in his junior classes reported being able to "feel" when somebody was looking at them, even though they could not see this ...
The stare-in-the-crowd effect is the notion that an eyes-forward, direct gaze is more easily detected than an averted gaze. First discovered by psychologist and neurophysiologist Michael von Grünau and his psychology student Christina Marie Anston using human subjects in 1995, [1] the processing advantage associated with this effect is thought to derive from the importance of eye contact as a ...
As each filter only passes light which is similarly polarised and blocks the orthogonally polarized light, each eye only sees one of the projected images, and the 3D effect is achieved. Linearly polarised glasses require the viewer to keep his or her head level, as tilting of the viewing filters will cause the images of the left and right ...