The Illusion of Performance: The Effect of Phantom Display Refresh Rates on User Expectations and Reaction Times
CoRR(2024)
摘要
User expectations impact the evaluation of new interactive systems. Elevated
expectations may enhance the perceived effectiveness of interfaces in user
studies, similar to a placebo effect observed in medical studies. To showcase
the placebo effect, we executed a user study with 18 participants who conducted
a reaction time test with two different computer screen refresh rates.
Participants saw a stated screen refresh rate before every condition, which
corresponded to the true refresh rate only in half of the conditions and was
lower or higher in the other half. Results revealed successful priming, as
participants believed in superior or inferior performance based on the
narrative despite using the opposite refresh rate. Post-experiment
questionnaires confirmed participants still held onto the initial narrative.
Interestingly, the objective performance remained unchanged between both
refresh rates. We discuss how study narratives can influence subjective
measures and suggest strategies to mitigate placebo effects in user-centered
study designs.
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