Do De Bono's green hat and green-red combination increase creativity in brainstorming on individuals and dyads?

How de Bono's hats affect creativity is an interesting research question. Recent research indicates that the green hat enhances creativity more than the emotional red hat. However, the underlying mechanism of this increase is not yet known since the sample size was small in the previous study. It is also not known what effects the combinations of these hats are on creativity in the groups or dyads. For these purposes, two experiments were conducted. In Experiment 1, in individuals, the green hat increased creativity more than the red one by increasing flexibility. In Experiment 2, the pairs were randomly formed as the green-green, red-red, green-red hat ones. The green-red hat dyads were more creative than the red-red hat ones. These findings indicate the beneficial effect of the combination that dictates creativity and emotionality. These findings were discussed in terms of the cognitive stimulation approach.