Horn Effect
Updated 2026-08-01
INTRODUCTION
English translation pending.
CORE DEFINITION
The negative counterpart of the halo effect, also called the devil effect. A single salient negative attribute, such as an appearance, an accent or one past mistake, spreads across unrelated dimensions and drags the whole evaluation down. The core proposition is that overall impressions are assembled from a dominant cue rather than from independent evidence, and negative cues carry more weight than positive ones of equal strength. The key qualification is that it describes a generalisation error, not a considered judgement about a real flaw in the area being assessed.
SCAFFOLDING EFFECT
Reduce cognitive load
- Evaluation hygiene: score each attribute separately before forming an overall view. - Cue check: ask whether a single negative detail is driving the whole judgement. - Evidence test: require domain-specific proof before discounting an unrelated strength.
Anchor fast decisions
Impressions form quickly from the most available cue, and negative information is weighted more heavily than positive information of equal strength. Once that cue sets the overall tone, later evidence is interpreted to fit it, so strengths are discounted and ambiguities read as further flaws. The result is a coherent but unfounded global judgement assembled from one attribute, with no self-correction unless the dimensions are scored independently.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Horn_effectverified
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