Examination of naturally occurring cases in which a person reports that a word is on the tip of his or her tongue has led several theorists to propose that an important role is played by blocking words whose intrusions hinder access to the correct targets. As yet, however, the blocking mechanism appears to have received little direct investigation experimentally. It was studied here by adapting the classic method of Brown and McNeill in which a person is presented with a definition (...) of a rare word and uses it to attempt to generate that target word. The adaptation that was made was to append a potential blocking word to the presentation of each definition. The potential blocking words were either phonologically related to the target or not, either semantically related to the target or not, and either rare or not. Only the first of these factors exerted a significant effect—more cases of tip of the tongue were experienced when the potential blocking word was phonologically related to the target than when it was not. This result suggests that the recall of a word on the basis of its meaning may proceed via an intermediate stage characterised by partial retrieval of its phonology. (shrink)

Can we understand brain lateralization in humans by analysis in terms of an evolutionarily stable strategy? The attempt to demonstrate a link between lateralization in humans and that in, for example, fish appears to hinge critically on whether the isomorphism is viewed as a matter of homology or homoplasy. Consideration of human handedness presents a number of challenges to the proposed framework.

The possibility that two forms of asymmetry underlie handedness is considered. Corballis has proposed that right-handedness developed when gesture encountered lateralized vocalization but may have been superimposed on a preexisting two-thirds dominance. Evidence is reviewed here which suggests that the baseline asymmetry is even more substantial than this, with possible implications for brain anatomy and genetic theories of handedness.

The predicate-argument approach, focused on perception, is compared with the ease-of-predication (or predicability) approach, focused on encyclopedic knowledge. The latter offers functional prediction and implementation in connectionist models. However, the two approaches characterise predicates in different ways. They thus resemble predicational cantilevers built out from opposite sides of cognition, with a gap that is yet to be bridged.

Two perspectives from which memories can be retrieved have been distinguished: field resembles the view from the first-person vantage point of original experience, whereas observer resembles the view from the third-person vantage point of a spectator. There is evidence that the incidences of the two types of perspective differ between at least two different cultural groups. It is hypothesised here that this is a special case of a more general relation between memory perspective and cultural individualism, such that field and (...) observer perspectives are more prevalent among people from, respectively, relatively individualist and relatively collectivist societies. Memory perspectives adopted by participants from a range of different countries were recorded, and were found to vary in the predicted manner. Regression analysis showed that the potential effects of three other cultural variables – uncertainty avoidance, masculinity and, to a lesser extent, power distance – were eclipsed by the influence of individualism, and the implications are discussed. (shrink)