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Eligibility
Inclusion criteria
Inclusion criteria: 1. Participants must be 18 years or older. 2. Participants must be proficient in English, as the study materials-including the intervention, comparator, and assessments—will be provided in English. To ensure adequate comprehension, participants will be asked to self-report their English reading proficiency on a scale from 1 (very poor) to 10 (excellent), and only those who rate their reading proficiency as 7 or higher will be eligible to participate in the study. 3. Participants must have access to the internet and a device capable of completing an online survey (e.g., computer, tablet, or smartphone). 4. Participants must provide informed consent before starting the study.
Exclusion criteria
Exclusion criteria: 1. Individuals with formal education or professional experience in health-related fields, such as healthcare professionals or academic researchers in health or medicine, will be excluded. This ensures the study targets individuals who may have less familiarity with the topic, thereby maximising the potential impact of the findings. 2. Individuals unable to complete the online survey or who fail to meet the minimum participation requirements will be excluded. 3. Responses will be excluded if they meet any of the following criteria: 3.1. Total completion time <10 minutes per summary (combined reading and question time) 3.2. Evidence of straight-line answering patterns 3.3. Inconsistent answers to related questions
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| 1. Comprehension measured using a standardised 10-item multiple-choice questionnaire for each summary at one timepoint 2. Readability measured using the Flesch-Kincaid Grade Level at one timepoint | — |
Secondary
| Measure | Time frame |
|---|---|
| 1. Readability measured using the following at one timepoint: 1.1. Flesch-Kincaid Grade Level 1.2. Gunning Fog Index 1.3. Automated Readability Index (ARI) 1.4. Coleman-Liau Index 1.5. SMOG Index 1.6. Linsear Write Readability Formula 2. Quality of information will be assessed by two independent systematic review experts using a standardised assessment form and rating scale at one timepoint focusing on four main types of errors: 2.1. Incorrect output (where the LLM generated wrong information) 2.2. Irrelevant output (where the LLM generated unnecessary or off-topic information) 2.3. Omissions (where the LLM failed to include key information that should be present) 2.4. Currency errors (where information is outdated or inconsistent with current evidence) 3. Safety measured by expert raters who will evaluate each summary for potential risks and biases at one timepoint, focusing on: 3.1. Risk of misinterpretation 3.2. Presence of bias or inappropriate recommendations 3.3. Appropriate presentation of limitations and uncertainties 3.4. Evidence of fabrication or hallucination 4. Perceived trustworthiness by asking participants to assess the trustworthiness of the reviews using a 5-point Likert scale based on items adapted from existing scales measuring trust in online health information. Participants will rate their agreement with the following statements: 4.1. "I trust the information provided in this summary." 4.2. "This summary is from a reliable source." 4.3. "I am confident in the accuracy of the information in this summary." 4.4. "I believe the source of this summary has expertise in the subject matter." 4.5. "I would use the information from this summary to make health decisions." After completing all assessments for all summaries, participants will be asked two additional questions: 1. Do you think this summary was written by: 1.1. A human expert 1.2. An AI system with human expert review 1.3. Not sure 2. How much would it matter to you if health info | — |
Countries
United States of America