* The reason for repetition: Repetition for academic struggles is viewed differently than repetition for reasons like illness or significant family disruptions. Many would support repeating a year due to extenuating circumstances, but fewer might support it solely for academic underperformance.
* The student's age and developmental stage: Repeating a year in elementary school is generally viewed differently than repeating a year in high school or college.
* The educational system: Different countries and even different school districts have varying approaches to grade retention, influencing public opinion.
* The specific student's situation: Individual circumstances greatly influence opinions. A highly motivated student struggling due to a temporary setback might receive more support for repetition than a chronically disengaged student.
In short, you can't find a single number representing how many people support grade repetition. Research on this topic focuses on the effectiveness of retention, rather than simply measuring public opinion. Surveys might offer insights into specific contexts (e.g., parents' views in a particular school district), but a global figure is impossible to obtain.