How many answer choices does a true/false question have?
AnswerTwo
The only options are true and false.
Education · Facts & stats
Test facts & stats
7 fact-checked facts about tests, exams and experiments, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
In the US, the SAT is mainly used for what?
AnswerCollege admissions
Many colleges use it as one admissions factor.
Going deeper
In a double-blind study, who does not know who gets the real treatment?
AnswerBoth the participants and the researchers
Double-blinding reduces bias on both sides.
What is a placebo?
AnswerAn inactive substance or fake treatment
Placebos help show whether a treatment has real effects.
In software, what is a unit test?
AnswerA test of a small individual piece of code
Unit tests check functions or components in isolation.
Expert level
Which country used imperial civil service examinations for more than a thousand years?
AnswerChina
China's exams ran from the Sui dynasty until 1905.
The finding that practice tests improve long-term memory is called what?
AnswerThe testing effect
Retrieving information strengthens memory.
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