Shoreshthe drift report · all case files
Case file

Media bias

Wikipedia's first sentence called it “real or perceived tendency of journalists and news producers within the mass media to approach both the present”. Today it says “widely disputed”. The one-line description Wikipedia serves to search engines and AI systems read “Bias or perceived bias of journalists and news producers within the mass”. It now reads “Bias within the mass media”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2005 one. Red dashes: removed from Wikipedia since. Pale dots: rewritten; the numbered note shows what it says now. 1 tap a number or a side note to jump between them
The opening as it read in 2005

Media bias is a real or perceived tendency of journalists and news producers within the mass media to approach both the presentation of particular stories, and the selection of which stories to cover, with an unbalanced perspective. In essence, "media bias" generally refers to accusations of either censorship or propagandism on the part of particular news sources, where such content is framed in the light of a preconceived agenda. Categories of bias are: Ethnic bias : Includes nationalism and regionalism . Corporate bias : Including advertising , political campaigns, the reporting of issues to favor a station's corporate economic interests. Social bias : Social and class divisions, within the context of a report, or the overall bias of reporting to favor the status class. Political bias: Regarding the split in political slant. Sensationalism : Which tends to supersede other biases, and manufacture or distort news as a purely commercial "product."1

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 15916025.
Today
Wikipedia's first sentence called it “real or perceived tendency of journalists and news producers within the mass media to approach both the present”. Today it says “widely disputed”. The one-line description Wikipedia serves to search engines and AI systems read “Bias or perceived bias of journalists and news producers within the mass”. It now reads “Bias within the mass media”. Read the current article and compare.
2005201020152020Oct '232025
disputed011111
Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.

What Wikipedia says this is

Every article opens by defining its subject. This one was redefined since 2005, and today's defining sentence is their current revision.

Then

real or perceived tendency of journalists and news producers within the mass media to approach both the present

Now

widely disputed

Sections that no longer exist

Present on October 6, 2023, absent today, with no near-matching heading in the current article and the article shorter overall, so this is not a renamed heading or a topic absorbed into a fuller treatment. 9 sections of 400 characters or more gone since October 6 2023, with the article 22,782 characters shorter.

  • Confirmation bias
  • Time biased media and Space biased media
  • United States political bias
  • Scholarly treatment in the United States and United Kingdom
  • Identifying bias
  • National and ethnic viewpoint
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.

← back to the drift report