Six Thinking Hats

Six Thinking Hats is a system credited to Dr. Edward de Bono, that was co-designed in 1983 by de Bono with Dr. Michael Hewitt-Gleeson and Eric Bienstock, based on de Bono's 'CoRT' program which describes a tool for group discussion and individual thinking involving six colored hats. "Six Thinking Hats" and the associated idea parallel thinking provide a means for groups to plan thinking processes in a detailed and cohesive way, and in doing so to think together more effectively.

In 2005, the tool found some use in the United Kingdom innovation sector, where it was offered by some facilitation companies and had been trialled within the United Kingdom's civil service.

In 2007, original co-designer, Michael Hewitt-Gleeson added the Seventh Grey 'Cap' for Wisdom. Former Six Hats trainer Ian Charles Carter is the first Seven Thinking Caps trainer and owns the training material IP.

Underlying principles 
The premise of the method is that the human brain thinks in a number of distinct ways which can be deliberately challenged, and hence planned for use in a structured way allowing one to develop tactics for thinking about particular issues. De Bono identifies six distinct directions in which the brain can be challenged. In each of these directions the brain will identify and bring into conscious thought certain aspects of issues being considered (e.g. gut instinct, pessimistic judgement, neutral facts). None of these directions is a completely natural way of thinking, but rather how some of us already represent the results of our thinking.

Since the hats do not represent natural modes of thinking, each hat must be used for a limited time only. Also, some will feel that using the hats is unnatural, uncomfortable or even counterproductive and against their better judgement.

A compelling example presented is sensitivity to "mismatch" stimuli. This is presented as a valuable survival instinct, because, in the natural world: the thing that is out of the ordinary may well be dangerous. This mode is identified as the root of negative judgement and critical thinking.

Colored hats are used as metaphors for each direction.  Switching to a direction is symbolized by the act of putting on a colored hat, either literally or metaphorically. This metaphor of using an imaginary hat or cap as a symbol for a different thinking direction was first mentioned by De Bono as early as 1971 in his book "Lateral Thinking for Management" when describing a brainstorming framework. These metaphors allow for a more complete and elaborate segregation of the thinking directions. The six thinking hats indicate problems and solutions about an idea the thinker may come up with. 

Similarly, "The Five Stages of Thinking" method—a set of tools corresponding to all six thinking hats—first appears in his CoRT Thinking Programme in 1973:

Strategies and programs
Having identified the six modes of thinking that can be accessed, distinct programs can be created. These are sequences of hats which encompass and structure the thinking process toward a distinct goal. A number of these are included in the materials provided to support the franchised training of the six hats method; however it is often necessary to adapt them to suit an individual purpose. Also, programs are often "emergent", which is to say that the group might plan the first few hats then the facilitator will see what seems to be the right way to go.

Sequences always begin and end with a blue hat; the group agrees together how they will think, then they do the thinking, then they evaluate the outcomes of that thinking and what they should do next.
Sequences (and indeed hats) may be used by individuals working alone or in groups. Example programs are shown below, each hat is typically used for approximately 2 minutes at a time – although at the start of a process an extended white hat session is common to get everyone onto the same page, and the red hat is recommended to be used for a very short period to get a visceral gut reaction – about 30 seconds, and in practice often takes the form of dot-voting.

Use 

Speedo researchers are said to have tried the six thinking hats in the creation of swimsuits. "They tried the "Six Thinking Hats" method of brainstorming, a green hat for creative ways to attack a problem, a black one to look at the feasibility of those ideas."

Typically, a project will begin with an extended white hat action, as facts are assembled. Thereafter each hat is used for a few minutes at a time only, except the red hat which is limited to a very short 30 seconds or so to ensure that it is an instinctive gut reaction, rather than a form of judgement. This pace is believed to have a positive impact on the thinking process, in accordance with Malcolm Gladwell's theories on "blink" thinking.

De Bono believed that the key to a successful use of the Six Thinking Hats methodology was the deliberate focusing of the discussion on a particular approach as needed during the meeting or collaboration session.  For instance, a meeting may be called to review a particular problem and to develop a solution for the problem.  The Six Thinking Hats method could then be used in a sequence to first explore the problem, then develop a set of solutions, and to finally choose a solution through critical examination of the solution set.

The meeting may start with everyone assuming the Blue hat to discuss how the meeting will be conducted and to develop the goals and objectives.  The discussion may then move to Red hat thinking in order to collect opinions and reactions to the problem.  This phase may also be used to develop constraints for the actual solution such as who will be affected by the problem and/or solutions.  Next the discussion may move to the (Yellow then) Green hat in order to generate ideas and possible solutions.  Next the discussion may move between White hat thinking as part of developing information and Black hat thinking to develop criticisms of the solution set.

Because everyone is focused on a particular approach at any one time, the group tends to be more collaborative than if one person is reacting emotionally (Red hat) while another person is trying to be objective (White hat) and still another person is being critical of the points which emerge from the discussion (Black hat). The hats aid individuals in addressing problems from a variety of angles, and focus individuals on deficiencies in the way that they approach problem solving.

Publication data
 Edward de Bono.

See also
 Coloured hat
 Educational psychology
 Intelligence
 Lateral thinking
 Team Role Inventories
 Wiktionary:thinking cap

References

Category:Books about creativity
Category:Educational psychology
Category:1985 non-fiction books
Category:Self-help books