ABSTRACT
Neo-Piagetian theories assign a central role to constructs such as working memory, attentional resources, or central computing space. As a result, the studies undertaken to test those theories have also created measurement instruments for such constructs. By developing and refining these measures the neo-Piagetians have also contributed to the technology of testing. However, not all the theories have contributed in equal measure. As discussed in chapter 3, Halford initially worked with the traditional concept of short-term memory understood as a storage site for information in the course of processing. As that concept became problematic, Halford turned to the dual-task, easy-to-hard method, which is valid, but does not provide a capacity measure. Others, like Fischer or Siegler, have been interested in the construction of scales of cognitive development in specific domains, but have not worked on measures of general information-processing capac-ity. The main contributions in this area come instead from the work of PascualLeone and, above all, Case.
