What science has to say

Scientists Ralph Lengler and Martin J. Eppler of the University of Lugano define visualisation methods as follows:

‘A systematic, rule-based, external, permanent and graphic representation which presents information in a way which promotes and further develops insight and understanding or communicates experience.’

Lengler and Eppler started the Visual Literacy project and developed a periodic system (see Figure 2-3) that provides an overview of the different kinds of visualisation and their methods.

Figure 2-3 displays the periodic system of visualisation methods (on the internet at www.visual-literacy.org ). By clicking on each of the elements displayed in the periodic system at the website you can call up examples and further information.

Figure 2-3: Periodic system of visualisation methods.

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Lengler and Eppler distinguish between the following kinds of visualisation methods:

check.png Methods for visualising quantitative data: For example, a pie chart, which may already be familiar to you from Excel files.

check.png Methods for visualising information: Information is more than just data. Data contain no hint as to their use. Information is typically connected with a particular situation and possesses context.

One example of an information visualisation technique is the so-called pie model (see Figure 2-4, taken from www.visual-literacy.org/periodic_table/periodic_table.html# ).

check.png Methods for visualising concepts: These methods extend the ways of visualising information by containing further clarification.

Mind Maps, the focus of this book, are an example of this.

check.png Methods for visualising strategies: A portfolio diagram is an example of this kind of visualisation technique (see Figure 2-2).

check.png Methods for visualising metaphors: For example, the graphic representation of a bridge, tree or iceberg metaphor.

check.png Combined visualisation methods: This involves combining several visualisation methods in a single image.

Figure 2-4: Example of a pie chart.

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