The 1 to 10 score is based on the composite of four metrics:
The higher the score, the better the social performance of the video.
This metric demotes whether the video manages to draw the audience in by measuring the peak in surprise within the first 8 seconds of viewing. Ranked from 1 to 10, all scores are relative to the peak level in the database.
Measured by the peak of happiness throughout the duration of the video, Retention represents how well the video maintains the attention of its audience.
This metric indicates the overall emotional reaction to the video, reflected in the peak level of engagement reached throughout the video.
Content with the high peak of happiness at the end of the video has the biggest impact on an audience. This metric is based on Daniel Kahneman's peak-to-end rule, that the impression left by an advert is determined by the emotions evoked at its peak and at the end. It is the average of the peak happiness value and the end happiness value - the higher that value (peak + end) / 2. The more memorable the positive impression left by the video.