Time is relative

Written by Guido Jansen in
September 2010

Theory:

The way we perceive duration is subjective. 

Application:

It's inevitable: we'll all have to wait for things sometime. When talking websites, this can mean loading or calculation times. Although you'll probably do everything to get a fast website to prevent people from waiting, sometimes you can't get around it. But that doesn't mean you can't make the waiting more pleasant, or at least less of a burden. What you do with that period of time effects how your visitors experience how long it actually takes.

Example: You probably know those preloader images that cycle around until everything is loaded onto your screen. Because we tend to count cycles (and not the actual time it takes), using slower/less cycles makes us perceive the loading as faster. Another thing you can do with loading time is preloading relevant content or a fun distraction to keep people busy and not just waiting. 

Recent posts
Optimization hierarchy of evidence
Optimization hierarchy of evidence

A hierarchy of evidence (or levels of evidence) is a heuristic used to rank the relative strength of results obtained from scientific research. I've created a version of this chart/pyramid applied to CRO which you can see below. It contains the options we have as optimizers and tools and methods we often use to gather data.

[EN] Datascience can do what?
[EN] Datascience can do what?

This is a bonus episode with Emily Robinson (Senior Data Scientist at Warby Parker) en Lukas Vermeer (Director of Experimentation at Booking.com). In her earlier session that day, Emily said that real progress starts when you put your work online for others to see and comment on which in this case was about Github. Someone from the audience wondered how that works out in larger companies where a manager or even a legal department might not be overly joyous about that to say the least so I asked Emily about her thoughts on that. Recorded live with audience pre-covid-19 at the Conversion Hotel conference in november 2019 on the island of Texel in The Netherlands. (oorspronkelijk gepubliceerd op https://www.cro.cafe/)