"After asking the examiner the questions you prepared about the fingerprints, you ask him questions about the shoeprints found outside the crime scene. This witness is only trained as a fingerprint examiner but you hope that the jury will consider his opinion about the shoeprints to be that of an expert. If they do consider his shoeprint comments to be knowledgeable and reliable, this would be an example of

The answer is the halo effect.

Explanation:

Halo effect, also called the halo error usually refers to the tendency to have good impressions related to a person or company in a specific area to have a positive influence in a person's opinion concerning other areas. It is considered a cognitive bias.

The halo effect is usually related to a cognitive bias or a perception distortion that influences the way through which people interpret a different kind of information concerning a person that they consider "a good person".    

The Halo Effect

Explanation:

The halo effect is a situation in which the general perception of an individual is influenced positively by personal qualities which may not be directly linked to the true picture of who the individual is. Halo effect makes cognitive bias judgement about a situation or individual based on specific traits.

From the question, This witness is only trained as a fingerprint examiner but gave opinion about the shoeprints which is a field He has no training or knowledge in. But because of his training in fingerprint examination, the jury considered his shoeprint comments to be knowledgeable and reliable. This is an Halo effect

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