In this article I am not going to try and define introspection. I am going to try to state as precisely as possible how the practice of introspection can be improved, starting from the principle that there exists a disjunction between the logic of action and of conceptualization and the practice of introspection does not require that one should already be in possession of an exhaustive scientific knowledge bearing upon it. . To make matters worse, innumerable commentators upon what passes (...) for introspection do not seem to have practised it and have certainly never contributed anything to its development. My aim is therefore to bring to light a procedure for progressive improvement in the practice of introspection when it is employed in a programme of research. (shrink)

It is well established that intelligence testing in its modern form developed and was deployed slightly differently in several countries, most notably France, England and the United States. Less widely recognized is the fact that its originators were all part of a close network of scholars who liaised internationally, exchanged ideas and were thoroughly acquainted with each other’s work. Their exchanges resulted from the transnational drive to develop a new social science of psychology involving a determination to find empirical evidence (...) on which to base understandings of the human mind. This soon led to the development of a means of testing human performance, not least in the field of intelligence. In the process, close contacts between all those who were to be pioneers of intelligence testing around the globe developed, in touch with and feeding off each others’ ideas. This article is an account of the development of that network. (shrink)