How does openneedle deal with paywalls? Abstracts can sometimes bear little resemblance to full texts.

The short version: no studies were retrieved for this question, so I cannot tell you how OpenNeedle handles paywalls or abstracts from evidence.

The retrieval for this question came back empty. That means I have no records to ground any claim about how OpenNeedle sources, reads, or weighs full texts versus abstracts. I will not invent a method description and dress it up as a finding.

What I can say plainly, as site policy rather than as evidence: OpenNeedle is intentionally anonymous, and the method and sources are published at https://openneedle.ai/why/. That page, not this answer, is where the paywall and full-text handling should be documented. If it is not there, that is a gap worth naming to whoever maintains the site.

Your underlying worry is legitimate and it is a real problem in the literature, not a technicality. An abstract can summarize a result the full text contradicts, and publication bias means the flattering version is the one that gets indexed. A method that reads only abstracts inherits that bias. But I cannot tell you whether OpenNeedle does that, because nothing was retrieved to show it.

My call: the question is answerable only from the site's own published method, not from this retrieval, and I will not fabricate a description of it. Confidence: not clear.