Pretending Wikipedia isn't also, is silly. This week's nonsense with the definition of 'recession' is proof enough of that. If you want to argue magnitude, you've already conceded what Wikipedia is (and I don't deny PragerU is what you claim it is).
Wikipedia is not perfectly unbiased, but if you honestly believe it is even comparable to PragerU you should seriously talk to someone about your biases and perception of the world.
There are left-wing equivalents of PragerU (ex: the Gravel Institute) that are just as far away from Wikipedia as PragerU is.
The method of this study was to deliberately construct a bias on wikipedia, which the researchers were able to successfully pull off with measurable effect.
> Mohammed Zakir (also known as Meyra) was an Ethiopian Oromo nationalist. Regarded as "legendary Oromo hero", he is noted for his high contribution to keep the lights of Oromo nationalism shining after the martyrdom of his two hero colleagues called Elemo Qiltu and Ahmad Taqi ... the Oromos would never forget this early exemplary hero. And above all, history will always remember Meyra and his heroism.
> The term "Cultural Marxism" refers to a far-right antisemitic conspiracy theory which claims that Western Marxism is the basis of continuing academic and intellectual efforts to subvert Western culture.
I feel like a lot of actual marxists would disagree with this statement. People like Antonio Gramsci, who basically laid the foundations for cultural marxism in the early 20th century.
> Gramsci is best known for his theory of cultural hegemony, which describes how the state and ruling capitalist class – the bourgeoisie – use cultural institutions to maintain power in capitalist societies.
Also, the last time I looked at the cultural marxism article, it simply said a "far-right conspiracy theory". Now they've somehow managed to roll up antisemitism in there too. Apparently it became antisemitic in just the past year or two!
At most, Wikipedia could be said to have a neo-liberal bias, an ideology upheld by both of the US' political parties, based on policies alone and not on each individual voter's personal and nuanced adherence. The parties are wrongly assumed to be polar opposites on the political spectrum by most US citizens, but they're not.
That holodomor example isn’t a good one. That article is up for, and mostly pertains to, the debate surrounding whether or not it was technically a genocide.