NBC newsman David Brinkley famously referred to the 1980 election map outcome showing Republican Ronald Reagan's 44-state landslide in blue as resembling a "suburban swimming pool". It is helpful to assess for optimum colour first using our Visual Stress Assessment Pack VIS008, as different people find different colours work best for them. In addition, Emily had an average of 3 EPM across both No Overlay and Overlay conditions, with an increase in EPM during the final sessions. Irlen Institute Overlays are available in Aqua, Blue-Grey, Golden-Rod, Grey, Green, Rose, Turquoise, Peach, Purple and Yellow. Zheng had allegedly used steganography to exfiltrate 20,000 documents from General Electric to Tianyi Aviation Technology Co.

Although the effects of these interventions were somewhat minimal (with the exception of the Modeling intervention for Emily which produced a sharp increasing trend), the LPP and Modeling interventions resulted in superior CWPM than either the No Overlay or Overlay interventions. It further claims that from 1976 to 2004, in an attempt to avoid favoritism in color-coding, the broadcast networks standardized the convention of alternating every four years between blue and red the color used for the incumbent president's party. A steganography tool can be used to camouflage the secret message in the least significant bits but it can introduce a random area that is too perfect. It is common for people with dyslexia to also have a visual processing problem like Irlen Syndrome or Visual Stress.In 1977, Kent concisely described the potential for covert channel signaling in general network communication protocols, even if the traffic is encrypted (in a footnote) in "Encryption-Based Protection for Interactive User/Computer Communication," Proceedings of the Fifth Data Communications Symposium, September 1977.

An Irlen overlay is bigger than an A4 page for total protection, but can can be cut to size for younger children with smaller books.

From an information theoretical point of view, that means that the channel must have more capacity than the "surface" signal requires. Reading Material: The type of reading material you are working with can also influence the effectiveness of colour overlays. Colored overlays are promoted by various groups and commonly referred to as the “Irlen Method” (Irlen 1991; Sawyer et al. Some matt coatings can reduce transparency, but coloured overlays from Crossbow Education have been subjected to stringent testing to ensure that maximum print clarity is retained while reflected light from the overlay surface has been significantly reduced.