Fluency and coherence assesses how well you can speak at a normal speed without too much hesitation. It also includes putting your sentences and ideas in a logical order and using cohesive devices (including linking words, pronouns and conjunctions, etc.) appropriately so that what you say is not difficult to follow.
Lexical resource assesses the range of vocabulary you use and how accurately and appropriately you use vocabulary to express meaning. It also includes the ability to express yourself using alternative vocabulary when you don’t know a particular word.
Grammatical range and accuracy assesses the range of grammar you use and how accurately and appropriately you use it.
Pronunciation assesses your ability to speak in a way which can be understood without too much effort.
Certificated IELTS examiners assess your speaking performance throughout the test. There are four assessment criteria (things which the examiner thinks about when deciding what score to give you):
Fluency and coherence assesses how well you can speak at a normal speed without too much hesitation. It also includes putting your sentences and ideas in a logical order and using cohesive devices (including linking words, pronouns and conjunctions, etc.) appropriately so that what you say is not difficult to follow.
Lexical resource assesses the range of vocabulary you use and how accurately and appropriately you use vocabulary to express meaning. It also includes the ability to express yourself using alternative vocabulary when you don’t know a particular word.
Grammatical range and accuracy assesses the range of grammar you use and how accurately and appropriately you use it.
Pronunciation assesses your ability to speak in a way which can be understood without too much effort.