The presence of attribution raises trust in the whole piece, including parts that were not attributed

What it is

Three paragraphs carry superscripts; the fourth is the model’s own causal inference, hanging on nothing. Asked about the fourth, readers still say “this piece has sources.” Superscripts raise the credibility appearance of the piece, not only of the sentences they hang on. A citation halo means the presence of attribution spreads trust onto parts that were not attributed; the object of checking becomes the piece, not the sentence.

Unsourced sentences should be marked unsourced — that is a default problem. Halo is sourced sentences lighting unsourced neighbours.

Why it happens

People take the piece as the evidence unit: an “explanation with citations” is tagged sourced as a whole. Local marks were meant to pinpoint; visually they become a register: superscripts present = a text that did its homework. Attention does not flip a trust switch sentence by sentence, especially when unmarked and marked sentences share type, tone, and paragraph.

The halo is stronger in generated text because marked sentences are often equally fluent, offering no friction of “this stretch is now unsourced.” A few high-prestige sources light the whole piece more readily than many ordinary ones.

Studying it

Build a piece: several sentences with genuinely supporting superscripts, several unmarked and factually false. Compare the same unmarked false sentence with no superscripts anywhere versus nested in a superscripted piece. Dependent variables: rate of judging the unmarked false sentence as sourced, trust in the whole, whether people notice the lack of a mark. Independent variables: density of superscripts, whether marked and unmarked share a paragraph, source prestige.

Same-paragraph versus new-paragraph must be split. If halo is mainly within a paragraph, splitting paragraphs is an intervention; if it still crosses, the piece-level frame has to be broken.

Where it stops holding

When every sentence is marked, unmarked means unsourced, and that style is strong, halo can be held down. When readers are explicitly asked to judge sentence by sentence, halo shrinks in the lab and may not in the wild. Prestige names (“United Nations”) halo more; experiments with ordinary blog sources will not generalise. This entry does not treat whether a synthesis sentence may be singly hung, nor one-click opening.

Applying it

• Do not treat a few superscripts as a badge that the whole piece was checked. If piece-level status is shown, write “some sentences have sources.”
• Unmarked fact sentences must be visually weaker than marked ones, or moved into a separate “unchecked” block, to cut same-paragraph halo.
• Do not use “contains citations” as a quality tag on a list or card; that amplifies halo at the product layer.
• Check: hand people a superscripted piece and ask whether the unmarked sentence has a source. Many yeses mean halo has already crossed the sentence boundary. Move the unmarked sentence into its own block and ask again; misjudgment should drop.

Related

• Same group: L3.08.1 A real citation that does not support the claim is a more hidden failure than no citation · L3.08.2 A source must open for checking in one click; an uncheckable mark only adds an appearance of credibility · L3.08.3 Attribution grain should be the sentence or paragraph; a list at the end cannot locate correspondence · L3.08.4 A conclusion synthesised from several sources cannot be attributed to any single one and must be marked separately
• Nearby: L3.02 Source Attribution · L3.03 Hallucination and the Fact-Checking Burden
• Search terms: citation halo · trust transfer · sourced appearance