XIIICognitive Bias
Halo Effect
Your bias is Halo Effect. A positive impression in one area colors overall judgment.
Why This Bias Happens
The mind prefers coherent portraits. One admirable trait spreads like light over unrelated traits.
Example 1
Seneca warns against mistaking eloquence for wisdom. Fine speech can coexist with poor judgment.
Example 2
Thorndike’s work on the halo effect showed evaluators giving uniformly high ratings after one favorable impression.