This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.
As a general rule, criteria is plural, and criterion is singular.
However, criterion is becoming rarer and rarer in everyday use, while criteria is slowly becoming the singular form (with criterias perhaps emerging as the plural). In formal contexts, it is best to use criterion as singular.