Investigation 06 · an evidence check
FAQ: What a Demonstration Cannot Tell You
A surprising experience can start a good question. It rarely finishes the investigation.
Are brain hacks scientifically proven?
“Brain hack” is a marketing phrase, not a scientific category. Evaluate each specific claim, task and outcome. Evidence for a narrow learning technique does not prove broad improvements in intelligence.
Can an illusion diagnose an attention problem?
No. An online illusion is not a validated clinical assessment. Viewing conditions and individual differences affect what you experience. Our size illustration is an example of visual context, not a screening tool.
Does a vivid memory have to be accurate?
No. Vividness alone cannot establish accuracy. Confidence can be informative in some conditions, but suggestion, repetition and later information can complicate the relationship. Read the memory investigation for the distinction between recall and a recording.
Is multitasking always impossible?
No. Some activities can overlap, especially when one is well practiced. Demanding tasks often compete or require switching, with costs that vary by task and context. The sensible question is whether the overlap increases errors or delays in this setting.
Can I eliminate my cognitive biases?
There is no general method that removes every bias. Specific process changes can address particular risks, but knowing a label does not guarantee better judgment. Start by identifying the risk and changing one part of the decision process.
What is a replication?
A replication investigates whether a finding occurs again under specified conditions. Differences in methods, samples and context matter when interpreting the result. One unsuccessful replication does not automatically settle the issue; neither does one successful original study.
The Center for Open Science’s replication resources provide useful background on reproducibility and research practice.
Does a small study tell us nothing?
A small study can be informative, but estimates may be imprecise and unusually large effects may not hold up. Look at design, uncertainty and the wider body of evidence. A large sample also cannot rescue a poorly chosen measure or an inappropriate comparison.
Which memory habit is a sensible starting point?
For learning, try recalling a short section without looking, then check and correct it. Revisit it after a delay. Benefits depend on the material, feedback and goal. See the research linked in our learning notes.
When should I seek professional help?
Seek qualified advice for persistent, worsening or disruptive difficulties with attention, memory or daily functioning. Sudden concerning changes require prompt medical attention. This website does not diagnose or treat conditions.