Statistical modelling was applied to come up with the final results, resulting in 37% of pupils across the province receiving lower grades earlier today.
The system being used across the UK is similar to the one being used in the Republic to calculate grades for Leaving Certificate.
A-level and Leaving Certificate exams were cancelled due to the coronavirus pandemic with Ireland and the UK instead opting for calculated grades.
The grades in the UK were awarded based on a combination of teacher professional judgment and statistical modelling, the Council for the Curriculum, Examinations and Assessment (CCEA) has said.
The organisation has pledged to ensure standards are maintained.
The Scottish Government performed a U-turn on Tuesday when it said it would use teachers’ predicted marks without a moderation system believed to favour those from better-off areas.
England’s Education Secretary Gavin Williamson has told pupils that results from their mock exams could replace their A-level grades.
A broader scope for appeals will be allowed following this year’s A-level and GCSE awards, Northern Ireland’s exams body said.
