Source Credibility Evaluation Protocol

Design a source evaluation protocol using lateral reading and credibility checks for digital information. Use when students need to evaluate websites, online sources, or social media claims.

What it does

Generates a structured lateral reading protocol for evaluating a specific type of source — teaching students to check what OTHER sources say about a source rather than analysing the source itself in isolation. This approach directly follows the research finding that professional fact-checkers outperform both students and university professors at source evaluation because they read laterally (opening new tabs to check who's behind a source) rather than vertically (reading the source itself more carefully for "clues" about reliability). The output includes a step-by-step protocol, a teacher modelling script, source-type-specific red and green flags, and a student checklist. AI is specifically valuable here because effective source evaluation requires both general principles (lateral reading, claim tracing) and source-type-specific knowledge (what makes a news article credible is different from what makes a scientific study credible) — a combination that is difficult to teach without domain expertise.

The evidence behind it

Wineburg & McGrew (2017, 2019) conducted landmark studies showing that professional fact-checkers evaluate sources fundamentally differently from students and even university professors. Fact-checkers use "lateral reading" — instead of staying on a source and looking for clues about its reliability, they immediately open new tabs to check what other sources say about the source's author, publisher, and claims. Students and professors, by contrast, use "vertical reading" — they stay on the page and look for surface credibility markers (professional design, .org domain, author credentials listed on the page) that are easily manipulated. Lateral readers took an average of 93 seconds to reach a correct evaluation; vertical readers took over 5 minutes and were more often wrong. Breakstone et al. (2021) found that the vast majority of US high school students cannot reliably evaluate online sources — they are easily deceived by professional-looking design and on-page credentials. Caulfield (2019) operationalised the research into the SIFT method: Stop (pause before engaging), Investigate the source (who's behind it?), Find better coverage (what do other sources say?), Trace claims (find the original source). This framework makes lateral reading teachable. Hobbs (2010) established that digital and media literacy requires structured instruction — students do not develop source evaluation skills naturally through internet use.

Sources

• Wineburg & McGrew (2017) — Lateral reading: reading less and learning more when evaluating digital information
• Wineburg & McGrew (2019) — Lateral reading and the nature of expertise
• Breakstone et al. (2021) — Students' civic online reasoning: a national portrait
• Caulfield (2019) — SIFT: the four moves (Stop, Investigate, Find better coverage, Trace claims)
• Hobbs (2010) — Digital and media literacy: a plan of action

How to use it in your lesson

For the best results with EvidenceLesson, give it:

• source_type — The type of source students are evaluating — e.g. website, news article, social media post, Wikipedia article, YouTube video, infographic
• evaluation_context — Why students are evaluating this source — the task or assignment context
• student_level — Age/year group
• specific_source (optional) — A description of the actual source being evaluated — topic, publisher, URL type
• student_profiles (optional) — From context engine: digital literacy levels, prior experience with source evaluation
• subject_area (optional) — The discipline context — affects what counts as credible evidence
• common_mistakes (optional) — Source evaluation errors the teacher has observed in this class

Known limitations

1. Lateral reading requires internet access and time. The SIFT process takes 3–5 minutes per source, which is manageable for a research project but impractical for every piece of information students encounter online. The skill teaches a thorough evaluation process best suited for academic research tasks — students also need quicker heuristics for everyday digital literacy (e.g., "check the source before sharing"), which this protocol doesn't cover.

1. The protocol teaches evaluation of individual sources but not synthesis across sources. A student who can evaluate one website may still struggle to synthesise information from multiple sources, weigh conflicting evidence, or recognise that even credible sources can disagree. Source evaluation is a necessary but not sufficient skill for research competence.

1. Some source types are harder to evaluate laterally than others. Websites and news articles are relatively straightforward to check — organisations and authors can be searched. Social media posts, anonymous forum contributions, and viral content shared without attribution are much harder to trace. The protocol is most effective for sources with identifiable authors and publishers.

Pairs well with