There will almost certainly be some folks pissed with the results -- Minnesota Timberwolves #1 pick Anthony Edwards had a stellar rookie campaign, earning just over 19 points, 4.7 rebounds and nearly 3 assists per game.
The decision is made by a list of sportswriters and broadcasters who vote for the top 3 rookies of the season -- first place votes get 5 points, second gets 3 points and third gets 1.