When is the "better-than-average" effect most likely to occur?

Question

Quizplus · Accepted Answer

The "better-than-average" effect is most likely to occur when people assess their abilities on ambiguous traits that can be interpreted in different ways. This is because people tend to have a biased perception of themselves and may interpret these ambiguous traits to suit their self-image. Objective and concrete measures of performance leave less room for interpretation and therefore may not produce as much of a bias in self-perception.

When Is the "Better-Than-Average" Effect Most Likely to Occur