Abstract
During its long life the impact test has not been unchallenged. Nevertheless, it has preserved its position as a standard test for assessing the mechanical integrity of steel constructions as well as for discriminating different grades of steel. Since its introduction, new insights into its functioning have been gained, and new methods based on both practical experience and development of theoretical concepts have appeared. The major advancement has been the establishment of fracture mechanics testing as an alternative to impact testing. Usually, the emergence of new techniques like these diagnostic tests is considered a result solely of objective thinking. Current ideas about the role and importance of subjective and social imprints on scientific thinking indicate, however, that socalled thought styles have to be taken into account in any attempt to understand the process of approaching the reality in question by various ways of thinking.
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