Every figure on this page, with the paper it came from and what it does not prove.
A typed open-ended answer averages about two words — on a phone and on a desktop alike.
~2.1 words on smartphone, ~2.0 on PC
Antoun, C., Couper, M.P. & Conrad, F.G. (2017). Effects of Mobile versus PC Web on Survey Response Quality. Public Opinion Quarterly 81(S1), 280–306 · doi:10.1093/poq/nfw088
Randomised crossover on a probability panel, n=1,390.
The same question answered out loud produces two to three times as many words.
22 words typed → 54–56 spoken
Höhne, J.K., Gavras, K. & Claassen, J. (2024). Typing or Speaking? Comparing Text and Voice Answers to Open Questions on Sensitive Topics in Smartphone Surveys. Social Science Computer Review 42(4), 1066–1085 · doi:10.1177/08944393231160961
N=1,001, four topics, all p<.001.
Speaking does not produce a longer version of the same answer. It produces a different one.
topic overlap between spoken and written answers: 30–70%
Gavras, K., Höhne, J.K., Blom, A.G. & Schoen, H. (2022). Innovating the collection of open-ended answers: the linguistic and content characteristics of written and oral answers to political attitude questions. Journal of the Royal Statistical Society Series A 185(3), 872–890
N=2,402.
A spoken answer is longer and takes the respondent less than half the time.
27 seconds spoken vs 61 seconds typed
Revilla, M. & Couper, M.P. (2026). Comparing voice and text open-ended answers. Survey Research Methods 20(1) · doi:10.18148/srm/2026.v20i1.8456
Asked to answer the same survey, willingness falls with every step towards being recorded — and falls furthest at video.
67% would type · 47% would speak · 38% would appear on camera
Claassen, J., Lenzner, T., Höhne, J.K. & Ziller, C. (2026). A Survey Mode of the Future? Investigating Respondents' Willingness to Participate in Self-Administered Video-Based Web Surveys. methods, data, analyses 20(1), 317–346 · doi:10.12758/mda.2025.10
Randomised, n=1,992, χ²(9)=137.11, p<.001. Measures stated willingness, not observed behaviour.
Privacy is the top objection to video and barely registers for voice, from the same research group using the same instrument.
41% cite privacy for video · 7.7% for voice
Claassen et al. (2026); Lenzner, T. & Höhne, J.K. (2022) (2026). Reasons for refusing video and voice answers. methods, data, analyses; International Journal of Market Research 64(5), 594–610
Multiple mentions allowed. "Uncomfortableness" is 19% for video, absent for voice.
Offered the camera in a real study, two-thirds of people said no — and the reasons were about being seen, not about privacy.
202 of 302 declined · 51% dislike seeing themselves · 48% not camera-ready · 32% found it intrusive
Socratic Technologies (2024). Video vs. Text Responses. Socratic Technologies research note, 24 April 2024
A market-research vendor publishing against its own video product. Real experiment with a stated N, but not peer reviewed.
Turning the camera on makes people more tired and less likely to speak up. This is causal, not correlational.
1,408 observations across 103 people, camera use manipulated over four weeks
Shockley, K.M., Gabriel, A.S., Robertson, D., Rosen, C.C., Chawla, N., et al. (2021). The fatiguing effects of camera use in virtual meetings: A within-person field experiment. Journal of Applied Psychology 106(8), 1137–1155 · doi:10.1037/apl0000948
Effect was stronger for women and for newer employees. Video meetings, not surveys.
Seeing your own face while you talk lowers what you think of your own performance.
self-evaluation 4.99 with self-view vs 5.57 without, d=0.54
Shin, S.Y., Ulusoy, E., Earle, K., Bente, G. & Van Der Heide, B. (2022). Mirror, mirror on my screen: Focus on self-presentation on video conferencing platforms. Journal of Computer-Mediated Communication 28(1) · doi:10.1093/jcmc/zmac028
When the camera is genuinely optional, most people keep it off — and the reason they give first is embarrassment, not privacy.
55.1% reluctant · shame and anxiety 19.4% vs home privacy 8.4%
Gherheș, V., Șimon, S. & Para, I. (2021). Analysing Students' Reasons for Keeping Their Webcams On or Off. Sustainability 13(6), 3203
Single university, engineering students, education setting.
Making a questionnaire shorter is one of the few reliably effective ways to raise response.
odds ratio 1.64 across 481 randomised trials
Edwards, P.J., Roberts, I., Clarke, M.J., DiGuiseppi, C., Wentz, R., Kwan, I., Cooper, R., Felix, L.M. & Pratap, S. (2009). Methods to increase response to postal and electronic questionnaires. Cochrane Database of Systematic Reviews, Art. No. MR000008 · doi:10.1002/14651858.MR000008.pub4
95% CI 1.43–1.87. The electronic-questionnaire arm rests on only two trials.
How hard something looks changes how long people think it will take, and whether they agree to do it at all.
the same instructions judged to take 15.1 minutes in a hard-to-read font vs 8.2 in a clear one
Song, H. & Schwarz, N. (2008). If It's Hard to Read, It's Hard to Do. Psychological Science 19(10), 986–988 · doi:10.1111/j.1467-9280.2008.02189.x
Most of the friction people blame on speaking is actually the recorder. The same study found a twelvefold difference between two implementations of the same idea.
~60% failed to answer with one voice input · under 5% with the other
Revilla, M., Couper, M.P., Bosch, O.J. & Asensio, M. (2020). Testing the Use of Voice Input in a Smartphone Web Survey. Social Science Computer Review 38(2), 207–224