This article is written in American English, which has its own spelling conventions (center, color, defense, realize, traveled) and some terms may be different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus.

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This article was the subject of a Wiki Education Foundation-supported course assignment, between 14 January 2019 and 3 May 2019. Further details are available on the course page. Student editor(s): Taneshiaj1.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 05:46, 17 January 2022 (UTC)Reply

Hi, given the relationship between this article and opponent-process theory, I'm giving a heads up that I've proposed a merge of A-process and opponent-process theory. Please join the discussion! --Xurizuri (talk) 07:39, 3 October 2021 (UTC)Reply

Did some large chunk of this article get deleted during one of several merges or redirects? The current version seems to have very little actual information on opponent processes as applied to color perception and just has a few images off to the side that don't seem to connect to the content of the article. TV4Fun (talk) 19:10, 2 June 2022 (UTC)Reply

I don't see history of any significant content going missing in quite a while, so if you see any info missing, its probably never been here. Sounds like your opportunity ;) Curran919 (talk) 07:18, 3 June 2022 (UTC)Reply

This article is already mostly American English. I will put in the template and make the corresponding changes where necessary (e.g. the few "colour" instances). Curran919 (talk) 14:31, 24 September 2022 (UTC)Reply

Concerning image "Log-log plot of spatial contrast sensitivity functions for luminance and chromatic contrast". Im not sure its properly related to the content of this article. Sure, the information is organized according to opponent channels, buts its not exactly descriptive of the opponent process theory. Otherwise, can someone work it better into the body of the article? Curran919 (talk) 21:36, 24 September 2022 (UTC)Reply

Has it been decided yet whether or not colors that can only be seen subjectively, by tricking the visual system, are "illusionary" or not? How long is that decision supposed to take? 162.246.139.210 (talk) 16:36, 11 March 2025 (UTC)Reply