choosing to be or do something yourself, rather than being chosen

Online surveys are notoriously biased, because respondents are self-selecting. 众所周知，在线调查存在偏见，因为回答者是自我选择受访的。

The country is run by a self-selecting oligarchy.

involving people or organizations that choose to take part in an activity, rather than being chosen by someone else

A self-selecting survey of more than 10,000 people showed approval of the government's action. 一项针对10,000多人的自行选择调查表明，他们对政府的行动表示赞同。

involving people who share a particular belief or characteristic choosing to do something

Political bloggers are a self-selecting group of the politically motivated. 政治博主是怀有政治动机的自主群体。

The journalism profession is self-selecting because if you don't have the ability to talk your way into journalism, then you probably don't have what it takes to be a journalist.