What a systematic review of eConsent found

Whether electronic consent is genuinely better than paper, or just more convenient to administer, is a question that comes up often enough to be worth answering with actual evidence rather than assumption. A systematic review covering 37 publications, 35 distinct studies, and 13,281 participants set out to do exactly that, and the results are more one-sided than the usual cautious "more research is needed" conclusion these reviews tend to land on.

Comprehension came out ahead, not just satisfaction

Twenty of the included studies specifically examined comprehension, comparing how well participants understood consent information delivered electronically versus on paper. Ten of those studies met a high methodological validity bar, and among that stronger evidence, 6 reported significantly better understanding of at least some concepts with eConsent compared to paper. None of the studies in the review reported better comprehension outcomes with paper.

That result matters more than a simple preference finding would. Comprehension is the actual purpose of informed consent, not a secondary nicety. A method that measurably improves understanding of at least some concepts is addressing the core function of the consent process, not just its packaging.

Satisfaction, usability, and an unexpected time result

Where the review examined satisfaction and usability, the pattern held. The single high-validity acceptability study found statistically significant higher satisfaction scores with eConsent, and the equivalent high-validity usability study reported statistically significant higher usability scores as well.

One result cuts against the assumption that digital automatically means faster. Cycle times, how long participants actually spent going through the consent process, increased with eConsent rather than decreased. The review's authors read this as a plausible sign of greater engagement with the content, not friction or confusion, participants spending more time with the material because the format made it easier to actually engage with, not because it was harder to get through. That's a genuinely different interpretation than "eConsent takes longer, which is a downside," and it's consistent with the comprehension finding: more time spent with material that's better understood looks like engagement, not a usability failure.

Where the actual efficiency gain showed up

If participant-facing consent didn't get faster, where did any efficiency benefit land? The review's comparative data from site staff and other study researchers pointed to reduced workload and lower administrative burden on the research side. That's a distinction worth being precise about: eConsent's efficiency case isn't "participants get through it faster," it's "the people running the study spend less time managing the paperwork and administrative overhead around it." Those are different value propositions, and conflating them risks setting the wrong expectation with participants, who may reasonably take longer with digital consent material precisely because they're engaging with it more thoroughly.

What the review didn't find is also informative

Across all the outcomes examined, comprehension, satisfaction, usability, and workload, no studies in the review reported better results with paper consent. That's a stronger and more unusual conclusion than most technology-versus-status-quo comparisons in research produce, where results are typically genuinely mixed and context-dependent. It doesn't mean every implementation of eConsent is automatically well designed; a poorly built electronic consent flow can still confuse participants regardless of the format's underlying advantages. It does mean the format itself, when implemented reasonably, isn't the trade-off some teams still assume it is.

What this means for how eConsent gets evaluated

A few practical implications follow for teams weighing or refining an eConsent approach:

• Don't measure success by speed alone. If cycle times go up, that's not automatically a red flag. It may reflect the engagement the review associated with better comprehension, and treating "faster" as the goal risks optimising away the exact behaviour that improves understanding.
• The workload benefit is real but sits with the research team, not the participant. Communicate and plan for that distinction rather than promising participants a quicker process alongside a better one.
• Comprehension gains were concentrated in "at least some concepts," not uniformly across every element of consent. That's a useful signal that the format helps most with the parts of consent that benefit from interactivity, structure, or pacing, not a blanket guarantee that every section will land better electronically without deliberate design attention.

The broader takeaway is straightforward: this is one of the more decisive pieces of comparative evidence available on a genuinely consequential process question, and it points in one direction. Electronic consent, evaluated properly across comprehension, satisfaction, usability, and administrative burden, has not been shown to lose to paper on any of these measures, and on several, including the one that matters most, it wins.