The tendency to generalize performance based on a single indicator is best described as:

Question

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The Halo Effect is the tendency to generalize performance on multiple areas as a result of an exception performance or reputation in one area.
For instance, an example of a Halo Effect mistake is making a great engineer a project manager. We all know great engineers who would be terrible project managers, yet this happens time and time again, especially when the engineer is most senior. The person with the best project management skill set would best serve the team the show, and the engineer should, well, engineer things.
Key Take Away: I think we've all seen the Halo Effect in some way, shape or form. It's the cause of many project team failures. You must honestly assess where a team member's strengths and weaknesses lie, and assign them roles based on reality.

The Tendency to Generalize Performance Based on a Single Indicator