The Design of Everyday Things - Deepstash
Behavioral Economics, Explained

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How to make rational decisions

The role of biases in decision-making

The impact of social norms on decision-making

Behavioral Economics, Explained

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Types of Errors in Design

Types of Errors in Design

There are 2 types of errors:

  • slips (a person intends to do an action and ends up doing something else). Can be: action-based(correct action applied to the wrong object), memory-lapse (forgetting)
  • mistakes (wrong goal or wrong plan formed). Can be: rule-based(correct diagnose, wrong action), knowledge-based(incorrect diagnose), memory-lapse (failing due to distraction)


797 reads

The 3 Levels of Processing that inform the 3 Stages of Action

The 3 Levels of Processing that inform the 3 Stages of Action

There are 3 levels of processing that inform the action a user does:

  • visceral (lowest level, correlated with calm and anxiety). Actions: perform and perceive.
  • behavioural (middle level, correlated with expectations and emotions). Actions: specify and interpret.
  • reflective (highest level, correlated with satisfaction). Actions: plan and compare.


422 reads

The fundamental concepts of Interaction

Affordances - the relationship between the properties of an object and the capabilities of an agent

Signifiers - an indicator that communicates appropriate behaviour to a person

Constraints - impediments of using a system

Mappings - the relationship between the elements of two sets of things

Feedback - communication of the results of an action

Conceptual model - explanation of how something works


272 reads

2 Innovation Forms

  • Incremental - Continuous Testing and Refinement. Starts from an existing product. Called also Hill Climbing (move your foot in one direction - if it is uphill, take one step. If not, change direction. Do that until the top of the peak). Con: cannot find a higher hill. 
  • Radical - Starts fresh, many times from scratch. Offers potential very high opportunities. Con: the hill might be even lower than the one previously tried.


208 reads

jean baptiste alphonse karr

The more things change, the more they are the same.



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User Researcher, passionate about behaviours and building the right products. I 'stash' about research, self-development and education.

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