Illusion

An illusion is a distortion of the senses, revealing how the brain normally organizes and interprets sensory stimulation. Though illusions distort reality, they are generally shared by most people. Illusions may occur with any of the human senses, but visual illusions (optical illusions), are the most well-known and understood. The emphasis on visual illusions occurs because vision often dominates the other senses. For example, individuals watching a ventriloquist will perceive the voice is coming from the dummy since they are able to see the dummy mouth the words. Some illusions are based on general assumptions the brain makes during perception. These assumptions are made using organizational principles (e.g., Gestalt theory), an individual's capacity for depth perception and motion perception, and perceptual constancy. Other illusions occur because of biological sensory structures within the human body or conditions outside of the body within one’s physical environment.

The term illusion refers to a specific form of sensory distortion. Unlike a hallucination, which is a distortion in the absence of a stimulus, an illusion describes a misinterpretation of a true sensation. For example, hearing voices regardless of the environment would be a hallucination, whereas hearing voices in the sound of running water (or other auditory source) would be an illusion.

Got Talent

Got Talent is a talent show television format conceived and owned by Simon Cowell's SYCOtv company. A pilot was made in the United Kingdom in 2005, hosted by Paul O'Grady, but after O'Grady's split with ITV, the series was postponed, resulting in America's Got Talent – the first full series of the format.

It has spawned spin-offs in over 58 countries (as of April 2014), in what is now referred to as the Got Talent format, similar to that described by FremantleMedia of the Idol and The X Factor formats. In April 2014, the format was named the world's most successful reality TV format ever by the Guinness World Records.

History

Got Talent was an invention by The X Factor creator Simon Cowell, with comedian and talk show host Paul O'Grady producing a pilot for ITV in 2005 under the provisional title Paul O'Grady's Got Talent. O'Grady left the network after disputes with ITV, resulting in Cowell moving the concept to the United States while he and ITV searched for a new show host.

Due to these issues, the Got Talent franchise ended up debuting first as America's Got Talent on NBC on 21 June 2006, with judges David Hasselhoff, Brandy Norwood, and Piers Morgan. The show's original series was hosted by Regis Philbin. In 2016, the judging panel consisted of Howie Mandel, Heidi Klum, Melanie Brown, and Simon Cowell, and hosted by Nick Cannon, who has been the presenter since 2009. The grand prize on America's Got Talent is $1 million, and, since season 3, a chance to headline a show on the Las Vegas Strip. America's Got Talent proved extremely successful for NBC, pulling in high ratings in both total viewers and the younger 18-49 demographic. The show's initial success in America is credited with the eventual launch of the British series, and the overall global launch of the Got Talent franchise.

America's Got Talent

America's Got Talent (sometimes abbreviated as AGT) is an American reality television series on the NBC television network, and part of the global British Got Talent franchise. It is a talent show that features singers, dancers, magicians, comedians, and other performers of all ages competing for the advertised top prize of one million dollars. The show debuted in June 2006 for the summer television season. From season three (2008) onwards, the prize includes the one million dollars, payable in a financial annuity over 40 years, and a chance to headline a show on the Las Vegas Strip. Among its significant features is that it gives an opportunity to talented amateurs or unknown performers, with the results decided by an audience vote. The format is a popular one and has often been reworked for television in the United States and the United Kingdom.

This incarnation was created by Simon Cowell, and was originally due to be a 2005 British series called Paul O'Grady's Got Talent but was postponed due to O'Grady's acrimonious split with broadcaster ITV (later launching as Britain's Got Talent in 2007). As such, the American version became the first full series of the franchise.

The X Factor (U.S. season 3)

The third and final season of the American music competition television show The X Factor premiered on Fox on September 11, 2013 and ended on December 19, 2013. This season was hosted by Mario Lopez. Simon Cowell and Demi Lovato returned to the judging panel, while Kelly Rowland and Paulina Rubio joined the panel as replacements for the departing judges.

Producer auditions began on March 6, 2013, in Los Angeles, and ended on May 4, 2013, in Denver. The judges auditions, which are televised, began on May 21, 2013, in Charleston, and ended on July 12, 2013, in Los Angeles. New for this season is the removal of the boot camp and judges' houses rounds of the competition which have been replaced with a new middle section, more reminiscent of the live shows.

On December 19, 2013, Alex & Sierra won the show, as mentored by Cowell. On February 7, 2014, Cowell announced his departure from the show which was followed by Fox announcing that it was not going to be renewing The X Factor for a fourth season.

Optical illusion

An optical illusion (also called a visual illusion) is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a perception that does not tally with a physical measurement of the stimulus source. There are three main types: literal optical illusions that create images that are different from the objects that make them, physiological illusions that are the effects of excessive stimulation of a specific type (brightness, colour, size, position, tilt, movement), and cognitive illusions, the result of unconscious inferences. Pathological visual illusions arise from a pathological exaggeration in physiological visual perception mechanisms causing the aforementioned types of illusions.

Optical illusions are often classified into categories including the physical and the cognitive or perceptual, and contrasted with optical hallucinations. Because

Physiological illusions

Physiological illusions, such as the afterimages following bright lights, or adapting stimuli of excessively longer alternating patterns (contingent perceptual aftereffect), are presumed to be the effects on the eyes or brain of excessive stimulation or interaction with contextual or competing stimuli of a specific type—brightness, color, position, tile, size, movement, etc. The theory is that a stimulus follows its individual dedicated neural path in the early stages of visual processing, and that intense or repetitive activity in that or interaction with active adjoining channels cause a physiological imbalance that alters perception.