August 2017

A user interface of a car that could be improved with cognitive walkthrough

Previously I have written about how usability is defined. Now I am going to discuss how a method known as cognitive walkthrough can be used to evaluate the usability of an application without hiring test users. 😲😊 The cognitive walkthrough is useful in capturing learnability issues. (more…)

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A light bulb and circles depicting ideas or concepts

When we see a horse 🐴, we recognize it automatically and we can talk about it by using the word horse. It seems effortless how the brain and the language can refer to something in the real world. In the case of language, this is known as referentiality, while in the case of the brain, it's called intentionality. What do these two words even mean? (more…)

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Butterfly on a field highlighting the contrast between the background and the foreground.

The fact that we see the world in 3D is nothing but an illusion created by the brain. The claim might seem provocative, but it's true. Our eyes have 2-dimensional retinas. So how can you get three dimensions out of two? Well, you can't. You might argue that the two images can be merged together to form a 3D image, I mean we have all seen that in with the wave of VR glasses coming to the market. Two small displays indeed create a 3D image. But what happens if you close one of your eyes? Will you suddenly stop seeing in 3D and revert to 2D? Not really, so the two eyes aren't the only reason why we have a 3D vision. (more…)

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