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Mobile Web Stress. Understanding the neurological impact of poor performance. Tammy Everts Velocity Europe – November 2013. Why neuroscientific mobile testing?. 2010 EEG study of desktop users Throttled connection from 5MB to 2MB
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Mobile Web Stress Understanding the neurological impact of poor performance Tammy Everts Velocity Europe – November 2013
2010 EEG study of desktop users • Throttled connection from 5MB to 2MB • Found that participants had to concentrate up to 50% harder • Afterward, participants reported negative brand associations
55% of all time spent on retail sites takes place on a mobile device. Shop.org / comScore, October 2013
Stuart McMillan, Schuh’s Journey to RWD (Conversion Conference 2013)
Assumption #1 Mobile users expectpages to be slow.
Radware, 2013 State of the Union: Mobile Ecommerce Performance
Radware, 2013 State of the Union: Mobile Ecommerce Performance
Assumption #2 Mobile users want to browse, not buy.
By 2017, retail mcommerceis expected to hit $113 billion –26% of total ecommerce sales. eMarketer, September 2013
Mobile shopping cart abandonment rate is 39% greaterthan desktop rate. 2013 Google I/O
Assumption #3 Users will stick around, even if pages are slow, if they really want to buy.
“95% of the consumer’s decisions are made at the subconsciouslevel.” Dr. Gerald Zaltman, Harvard UniversityExecutive Committee of Harvard University’s Mind, Brain and Behavior Interfaculty Initiative
Patients with damage to emotional parts of the brain cannot make decisions, despite having no change in IQ. Antonio Damasio, Descartes’ Error
The problem with surveys… Traditional research relies on eliciting post-cognitive responses. But thinking and talking about emotions changes and distorts them.
Five benefits of neuro-scientific testing • Evaluates think/feel (not say) • Quantified data, at deeper-than-Qual levels • Moment-by-moment interaction • Cause-and-effect triggers • Fresh, deeper insights
Our research team • Seren– leaders in customer experience & service design • Neurosense– global leader in implicit methodologies • NeuroStrata– expert consultants in blending neuromarketingapplications
Our testers • 20 testers (male and female) • Pre-screened to ensure normal cognitive functioning • Mobile device users • Did not know they were part of a performance study
Methodology • Standardized set of shopping tasks (browsing and checkout) • Testers served sites over one of two speeds: • normal Wifi • artificial 500ms delay • Using EEG headset and eyetracker, measured moment-by-moment responses
Why test a 500ms delay? Case study: The impact of HTML delay on mobile business metrics
We focused on the metrics most affected by the 500ms delay. Frustration Emotional engagement
Normal speed 2.83s 2.66s 2.92s 4.24s
EEG summary • A mere 500ms delay results in significant increase in frustration levels. • Faster pages result in higher levels of engagement. • Different sites trigger emotional shifts at different phases of the experience (browsing vs. checkout). • Important: These tests happened under ideal browsing conditions.
Bonus Study: Implicit Response Test The effect of loading speed on brand perception
We react faster to congruent stimuli than incongruent stimuli.