Table of Contents
Almost everyone searches for sexual health information online at some point, and almost everyone brings the wrong tools to that search without realizing it. Most of us evaluate a source the way we'd evaluate a stranger at a party: does it look put together, does it sound confident, does it match what I already suspected. None of those instincts reliably tracks whether something is actually true, and sexual health is one of the topics where getting it wrong carries the highest personal cost.
Not All Evidence Is Equal
Evidence based medicine rests on a simple but often ignored idea: some kinds of research are far more trustworthy than others, and the difference isn't about how confidently a claim is stated. A systematic review or meta analysis, which pools the results of many independent studies, sits near the top of that hierarchy. A single randomized controlled trial sits below that. Observational studies, expert opinion, and personal anecdote sit lower still, not because they're worthless, but because each step down the ladder makes it easier for bias, coincidence, or a small unrepresentative sample to produce a misleading result.
This matters enormously for sexual health topics specifically, because so much of what circulates publicly rests on the bottom rungs of that ladder: one small study, one clinician's personal experience, one influencer's anecdote presented with the confidence of a settled scientific fact.
Why a Single Study Is Never the Final Word
It's tempting to treat "a study found" as equivalent to "this is now known to be true." The research on how well findings actually hold up under retesting suggests real caution is warranted. In 2015, a large international collaboration known as the Open Science Collaboration attempted to replicate 100 previously published psychology studies, using the original materials wherever possible. The results were sobering: although 97% of the original studies had reported statistically significant findings, only 36% of the replication attempts produced a statistically significant result in the same direction (Open Science Collaboration, 2015). Just as notably, among the studies that did replicate, the effect sizes in the replication were, on average, about half the size reported in the original study (Open Science Collaboration, 2015).
None of this means psychological or health research is untrustworthy as a field. It means a single study, however well publicized, is a data point rather than a verdict, and a claim that has been independently replicated across multiple research teams deserves far more confidence than one that has only ever been reported once.
How People Actually Evaluate Sexual Health Information
Given how much sexual health information seeking now happens online, researchers have studied exactly how people, adolescents in particular, decide what to trust. The findings are not especially encouraging. A systematic review of studies on adolescent information evaluation found that young users' strategies to appraise online health information are often unsophisticated, that their searches tend to be superficial, and that they seldom consider the underlying source of a claim at all (Voogt et al., 2022). The same review noted that when adolescents do evaluate a source, their judgments tend to be based on relevance or ease of access rather than genuine reliability or credibility (Voogt et al., 2022).
Qualitative research on late adolescents specifically searching for sexual health information found something similar but more specific: participants generally judged credibility using surface level authority markers, such as whether a website's URL looked institutional, whether the organization's name sounded reputable, or whether an individual author was clearly identified, rather than by examining the actual evidence behind a claim (Lin & Constantine, as cited in Starling, 2018). The same body of research found that most participants were skeptical of pages containing advertising, associating ads with reduced trustworthiness, which is at least one instinct worth keeping (Starling, 2018).
A separate cross sectional study of adolescents evaluating sexual health websites reached a related conclusion, noting that certain subgroups, including male adolescents and academically disadvantaged students, were less likely to critically assess the actual validity of information they encountered online, focusing instead on how easy a site was to read and navigate (Buhi et al., 2010, as cited in Podolski et al., 2017). Readability and design, in other words, were doing more work in shaping trust than accuracy was.
| What people commonly rely on | What it actually indicates |
|---|---|
| Professional looking website design | Design budget, not accuracy |
| Confident, simple tone | Communication style, not evidence quality |
| A recognizable organization name | Somewhat useful, but easily imitated |
| Absence of advertising | Weak positive signal, not proof of accuracy |
| Number of times a claim is repeated | Popularity of the claim, not its truth |
A Practical Evaluation Method
Librarian Sarah Blakeslee developed a widely used evaluation framework in 2004 known as the CRAAP test, an acronym covering five criteria: Currency, Relevance, Authority, Accuracy, and Purpose (Blakeslee, 2004). Applied specifically to sexual health claims, each element translates into a concrete question.
- Currency: When was this information published or last updated? Sexual health guidance on topics like contraceptive effectiveness or STI treatment changes as new research emerges, so a ten year old claim may already be outdated.
- Relevance: Does this source actually address the specific population or situation in question, or is it being generalized from a very different context?
- Authority: Who wrote this, and what is their actual expertise? An identifiable author with relevant credentials, or a recognized public health institution, carries more weight than an anonymous post.
- Accuracy: Can the claim be traced back to an original study or dataset, and does that original source actually say what's being claimed? Misrepresentation of an original finding is extremely common.
- Purpose: Why was this content created? Content designed to sell a product, provoke an emotional reaction, or support a predetermined ideological position deserves more scrutiny than content published by a body with no such stake in the outcome.
The advertising problem specifically.
Research on how editorial style affects perceived credibility found that adolescents generally distrust obvious advertising, but often cannot reliably distinguish sponsored content from genuine editorial content when the two are blended together (Voogt et al., 2022). This makes the Purpose question above especially important: sponsored or monetized content can look identical to independent information while serving a very different underlying goal.
A well designed page and a well designed study can look remarkably alike to someone who has never been shown the difference.
A line worth remembering the next time a headline feels too clean
One More Trap: Correlation Presented as Causation
A large share of misleading sexual health claims don't come from fabricated data at all; they come from a real, accurately reported correlation being quietly reframed as a causal claim. A study might genuinely find that two variables are statistically associated with each other, without establishing that one causes the other, since a third factor might explain both, or the direction of cause and effect might run the opposite way from what's assumed. Headlines routinely drop this distinction, turning "associated with" into "causes," which is precisely the kind of subtle shift the accuracy check in the framework above is designed to catch.
Common Misunderstandings, Cleared Up
"If a claim has a citation attached, doesn't that make it verified?"
Not by itself. A citation only tells you where a claim originated, not whether the original study was well designed, whether it has been replicated, or whether the citing source represented it accurately. Following the citation back to the original source is the step most people skip.
"Isn't a personal or professional website less trustworthy than a big media outlet?"
Not necessarily. Authority depends on relevant expertise and evidence, not audience size. A specialist's personal site citing primary research can be considerably more reliable than a large outlet summarizing that same research secondhand and imprecisely.
"If most people online seem to agree on a claim, doesn't that make it more credible?"
Repetition and accuracy are separate things. Research on adolescent information evaluation specifically found that ease of access and familiarity drove trust more than actual reliability did (Voogt et al., 2022), which is exactly the pattern that lets an inaccurate claim spread widely without ever being verified.
Putting This Into Practice
- The next time a sexual health claim catches your attention, identify whether it traces back to a specific study, a recognized institution, or neither.
- If a study is cited, spend two minutes trying to find the original source rather than relying on a secondhand summary.
- Ask whether the claim describes a correlation or an actual demonstrated cause, and notice which word the source itself is using.
- Apply the Purpose question deliberately: notice who benefits, financially or ideologically, if you believe this particular claim.
References
Blakeslee, S. (2004). The CRAAP test. LOEX Quarterly, 31(3), 6–7.
Open Science Collaboration. (2015). Estimating the reproducibility of psychological science. Science, 349(6251), Article aac4716. https://doi.org/10.1126/science.aac4716
Podolski, M. M., Hamm, A., Lehmann, C., & Voigt, K. (2017). Sexual health and the internet: Cross-sectional study of online preferences among adolescents. Journal of Adolescent Health, 61(6), 738–745.
Starling, M. S. (2018). Measuring and modeling adolescent utilization, judgments, and trust of online sexual health information [Doctoral dissertation, University of California, Berkeley]. eScholarship.
Voogt, C., Krahmer, E., & Verdonschot, R. (2022). Superlatives, clickbaits, appeals to authority, poor grammar, or boldface: Is editorial style related to the credibility of online health messages? Frontiers in Communication, 7, Article 934104.