According to Nielsen, how many users are necessary to gain noteworthy insights from a design research session?

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BlackTom AI · Accepted Answer

The question asks: According to Nielsen, how many users are necessary to gain noteworthy insights from a design research session?
Option a: 'At least 2.' While testing with 2 users can reveal some issues, Nielsen argues that 2 is usually not enough to gain meaningful, reliable insights across a range of tasks and scenarios; insights tend to be limited and may miss broader patterns. This makes option a overstated for capturing noteworthy insights.
Option b: 'As many as possible.' The idea of collecting as many participants as possible contradicts Nielsen's findings on diminishing returns in usability testing. After a point, adding more users yields progressively fewer new findings, so this option overstates efficiency and practicality.
Option c: '5 or more.' This aligns with Nielsen's well-cited guidance that roughly 5 users uncover the majority of usability problems and provide a solid sample for actionable insights. The concept of saturation around this number explains why testing with around five participants yields meaningful results without unnecessary resource expenditure.
In summary, option a underestimates the needed sample, option b overestimates the value of simply increasing quantity, and option c accurately reflects Nielsen’s recommended threshold of about five or more users to obtain noteworthy insights.

Technical Design | csd3516f25-a.sg

According to Nielsen, how many users are necessary to gain noteworthy insights from a design research session?

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