No. #29

Observer-Expectancy Effect
- Expectations Influence Outcomes

The observer-expectancy effect occurs when a researcher's expectations or beliefs about the outcome of an experiment or study influence the results. This can affect user testing and research in product development, leading to biased data based on the expectations of the observer.

Read more on Wikipedia

Product example

In usability testing, if the observer expects a feature to be well-received, their interactions with the participant might inadvertently lead to more positive feedback.

Empathy tips


Neutral Testing Environments

Ensure testing environments and protocols minimize observer influence.


Blind Testing Methods

Use blind testing methods to prevent bias from influencing results.


Train Researchers

Educate researchers and testers on the importance of neutrality.


Feedback Validation

Cross-validate user feedback through multiple channels to ensure reliability.

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