BOSTON — Massachusetts voters said yes to auditing the Legislature and to giving union rights to drivers for ride-hailing companies like Uber and Lyft, but rejected a measure that would have allowed the use of certain plant-based psychedelics.

Question 1 gives the state auditor the power to audit the Legislature. It passed with 71% of the vote.

The ballot measure had been spearheaded by state Auditor Diana DiZoglio, who formerly served in both the state House and Senate. She said the passage of the measure is a victory for those who want a more open state government.

“The people of Massachusetts want the equity, transparency and accountability that a legislative audit would bring,” she said.

Critics had said the question would violate the separation of powers outlined in the Massachusetts Constitution.

Democratic Senate President Karen Spilka and House Speaker Ronald Mariano released a statement saying they will consider “how to best respect the Question 1 election results in a manner that aligns with the fundamental principles of the Massachusetts Constitution, including separation of powers.”

Question 3

Question 3, meanwhile, allows drivers for ride-hailing companies to unionize. Such drivers, like for Uber and Lyft, are considered independent contractors who don’t have the right to unionize under federal law.

The measure passed 53.9% to 46.1%.

The proposal would allow them to unionize in the state. Drivers wouldn’t be required to participate. Individual companies could team up to form associations to represent their interests in negotiations.

As part of the measure, the state would have the right to approve negotiated contracts. The proposal would also create a hearing process when a company or union is charged with an unfair work practice.

Unions pushed for the change despite a settlement announced in June by the state attorney general’s office guaranteeing Uber and Lyft drivers earn a minimum pay standard of $32.50 per hour.

Opponents said the measure will raise prices for riders without directly benefitting drivers. Critics also argued that the question would create what they call “a new radical labor category” that is inconsistent with federal labor laws and say the drivers already enjoy benefits including the higher hourly rate and paid sick and family medical leave.

Question 4

Voters said “No” to Question 4, which would have allowed residents 21 and older to grow and use plant-based psychedelics in certain circumstances, making it the third state to legalize some mind-altering drugs that are considered illegal by the federal government.

The measure failing by a tally of 57% to 43%.

The psychedelics would include two found in so-called “magic mushrooms” — psilocybin and psilocyn — and three from plants — mescaline, dimethyltryptamine and ibogaine.

The measure would allow the substances to be purchased at approved locations for use under the supervision of a licensed facilitator. Although it would prohibit retail sale, it would let individuals grow psychedelics at home and share them.

The proposal would allow for the regulation and taxation of psychedelics and create a five-member commission to oversee the industry.

Critics warned it could lead to a black market. They also argued the centers would not be prevented from giving psychedelics to people considered high risk, like those with schizophrenia, bipolar illness or who are pregnant or breastfeeding.