Since the publication of Ericsson and Simon's ground-breaking work in the early 1980s, verbal data has been used increasingly to study cognitive processes in many areas of psychology, and concurrent and retrospective verbal reports are now generally accepted as important sources of data on subjects'[...]

Professionals such as medical doctors, aeroplane pilots, lawyers, and technical specialists find that some of their peers have reached high levels of achievement that are difficult to measure objectively. In order to understand to what extent it is possible to learn from these expert performers for [...]

Excellence and the highest levels of performance in the arts and sciences, sports, and games have always been an object of fascination to both scientists and lay people. Only during the last 20 years have scientists studied these levels of performance in the laboratory in order to identify their med[...]