Are All Online IQ Tests Fake?

No, the frequent claim that one may encounter in the average Reddit comment section that "all online IQ tests are fake" and "only a psychologist proctored IQ test is real" is a oversimplification and misattributes the reason to the mode of administration (online vs. psychologist proctored).

While most online tests that dominate search results and social media feeds are unvalidated and nothing more than a quick cash grab, not all of them are. These commercially driven tests are usually made without any knowledge on psychometrics or its standards, often throwing together random questions and returning random scores at the end, and this has severely damaged public confidence and understanding in psychometrics. This is why these tests don't publish data on reliability, validity, or normative sampling.

However, this doesn't mean all online IQ tests are inaccurate and you can find many validated online tests in this community's resources list.

Is the Online Format Less Accurate Than In-Person Testing?

One misconception that has arisen is that the online format is inherently less accurate than an in-person format. Validity depends on the construction of the test and the conditions of administration and recent research proves this. A 2024 randomized repeated-measures study found that adults who completed the WAIS-IV online scored virtually the same as those tested in person, with FSIQ correlations above .90 (Bartholomaeus et al., 2025).

Furthermore, a meta-analysis published in 2025 pooled dozens of remote neuropsychology studies and found that, across verbal and non-verbal tasks, remote and in-person administrations differed by well under one tenth of a standard deviation, below thresholds that matter in clinical and educational decisions (Alva et al., 2025).

This has also been found for children on the WISC-V (Hamner et al., 2022) as well as clinical populations being administered online. Even self administered online tests have met the bar, for example, the ICAR-16 shows a convergent validity of r ≈ .80 with the in-person WAIS-IV, and the longer ICAR-60 reaches the high .80s to low .90s (Young & Keith, 2020).

What Actually Determines IQ Test Accuracy

So the final answer is pretty simple: bad online IQ tests are bad because they ignore psychometric standards, not because they happen to be online. Well designed digital tests replicate in-person accuracy, with mode of delivery contributing little more than trivial measurement error.

Before trusting any IQ score, whether it is in-person or online, try to find evidence that the test is reliable, properly normed, and validated for the purpose you have in mind. If that evidence is there, the mode of administration makes no difference; if it is absent, the test was never trustworthy to begin with.

References

Alva, J. I., Brewster, R. C., Mahmood, Z., Harrell, K. M., Kaiser, N. C., Riesthuis, P., YoungSciortino, K., Brunet, H. E., Johnson, M. E., & Kovach, S. (2025). Are tele-neuropsychology and in-person assessment scores meaningfully different? A systematic review and meta-analysis. The Clinical Neuropsychologist, 39(5), 1037–1072. https://doi.org/10.1080/13854046.2025.2493343

Bartholomaeus, V., Chronowski, N. H., Santiago, P. H. R., Kuring, J. K., & Sawyer, A. (2025). Equivalence of telehealth and face-to-face administration of the Wechsler Adult Intelligence Scale Fourth Edition (WAIS-IV). The Clinical Neuropsychologist, 39(5), 1073–1096. https://doi.org/10.1080/13854046.2024.2335117

Hamner, T., Salorio, C. F., Kalb, L., & Jacobson, L. A. (2022). Equivalency of In-Person Versus Remote Assessment: WISC-V and KTEA-3 Performance in Clinically Referred Children and Adolescents. Journal of the International Neuropsychological Society : JINS, 28(8), 835–844. https://pmc.ncbi.nlm.nih.gov/articles/PMC9026666/

Young, S., & Keith, T. Z. (2020). An examination of the convergent validity of the ICAR16 and WAIS-IV. Journal of Psychoeducational Assessment, 38(8), 1024–1036. https://doi.org/10.1177/0734282920943455