Wiki Test by Marc Kerstein

Created by: Marc Kerstein

Wiki Test is a groundbreaking mentalism app by Marc Kerstein that allows magicians to perform an astonishing book test using a spectator's own phone. The effect unfolds as follows: the spectator opens Wikipedia on their device, searches for any topic (with the freedom to change their mind mid-search), and then selects a word from the resulting page. The magician reveals not only the chosen word but also the original search term—even if the spectator altered it before finalizing. This trick is perfect for close-up or virtual performances, blending modern technology with classic mentalism. Buyers should note it's currently iOS-only, requiring an iPhone for the performer.

Key features

  • Uses the spectator's phone (no gimmicks or pre-show work)

  • Reveals both the chosen word and the original search term

  • Works seamlessly in live or virtual settings

  • Pairs well with other mentalism apps like 'The Stranger'

  • Requires scripting and rehearsal for optimal performance

Pros

  • Highly deceptive—feels like pure mind reading

  • Versatile for close-up, parlour, or Zoom performances

  • No reset needed; ready to perform anytime

  • Strong audience reactions and lasting impact

  • Detailed instructions and multiple performance methods included

Cons

  • iOS-only (no Android version)

  • Requires careful scripting to avoid glitches

  • Higher price point for an app-based trick

  • Not ideal for performers uncomfortable with technology

Effect

Wiki Test is a powerful mentalism effect where the magician appears to read a spectator's mind with uncanny accuracy. The spectator uses their own phone to search for anything on Wikipedia—a person, place, or thing. They can even change their mind before finalizing the search. Then, they scroll through the page and think of any word. The magician reveals not only the word they were thinking of but also the exact topic they searched for—even if they initially considered something else before changing their mind.

Full Details

Wiki Test is a modern take on the classic book test, but with a crucial difference: it happens entirely on the spectator’s phone, eliminating any suspicion of prearranged information. The method is highly deceptive, with no suspicious actions or forced choices. The spectator genuinely searches for anything they want, and the magician receives the information in real time.

The effect is versatile—it can be performed live, over Zoom, or even in casual settings like cafés. It requires minimal setup and no pre-show work, making it an ideal impromptu piece. The routine includes multiple phases, allowing the magician to build up to a stronger revelation, such as revealing both the search term and the word the spectator was thinking of.

Who Should Consider the Trick

Wiki Test is ideal for:

  • Mentalists looking for a clean, modern book test.
  • Close-up performers who want a powerful, phone-based effect.
  • Magicians who perform digitally (e.g., over Zoom or social media).
  • Anyone who wants a self-working, high-impact mentalism routine.

Since it relies on a spectator’s phone, it’s best suited for performers comfortable with technology-based magic. However, the method is not app-dependent—it works naturally within the spectator’s own browsing experience.

Information on How Difficult It Is to Perform

The method itself is straightforward, but the performance requires strong scripting and audience management. As reviewer RealMagicReview notes:

"You don’t need loads of rehearsal, but you do need to think about your performance. If stuff goes wrong, you still get something amazing, but scripting and emphasis matter."

The trick is not technically demanding, but it benefits from smooth presentation. The more natural the magician makes the process seem, the stronger the effect.

What Magicians Say

  • RealMagicReview calls it "a miracle" and "the best mind-reading effect you can do." He emphasizes its versatility, saying it pairs well with other mentalism apps like The Stranger.
  • ReidFerry describes it as "absolutely clean, killer mind-reading" and says it’s one of his all-time favorite effects. He notes that while it’s a premium-priced effect, it’s worth the investment for the reactions it generates.

Both reviewers highlight that the method is more impressive than the effect itself, making it a strong addition to any mentalist’s repertoire.

Final Thoughts

Wiki Test is a modern classic in mentalism—a self-working, impossibly clean book test that plays big in any setting. While it requires thoughtful presentation, the method is reliable and leaves no room for backtracking. If you're looking for a powerful closer that feels like real mind-reading, Wiki Test is a must-have.

What people are saying about Wiki Test

RealMagicReview says...

This is literally the mummy of all apps. It's so miraculous that I don't want anybody even thinking it's something to do with technology. [...] The thinking that goes into it—the time, the passion—it's historical.

ReidFerry says...

Wiki Test is probably the best mind-reading effect you can do in terms of sheer power. It's iPhone-only but highly worth it—just absolutely clean, killer mentalism.

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