Our objectives in this article are to bring some theoretical order into developmental sequences and simultaneities in children’s ability to appreciate multiple labels for single objects, to reason with identity statements, to reason hypothetically, counterfactually, and with beliefs and desires, and to explain why an ‘implicit’ understanding of belief occurs before an ‘explicit’ understanding. The central idea behind our explanation is the emerging grasp of how objects of thought and desire relate to real objects and to each other. To capture (...) this idea we make use of the notion of discourse referents, as did Perner and Brandl (2005), to explain the developmental link between understanding beliefs and alternative naming. We present confirming evidence of the prediction from this analysis that children should have comparable problems with understanding identity statements. We explain the precociously correct answers in ‘implicit’ false belief tests based on indirect measures in the following way: From infancy children are able to keep track of other people’s experiences, to reason about counterfactual circumstances, and to reason about goal-directed (rational) action depending on given circumstances. Indirect tasks reduce the bias to use actual circumstances for reasoning about goal directed action compared to the traditional task, which leads to more correct answers. An emerging metarepresentational understanding helps overcome these biases and enables not only correct action prediction but also the explanation of erroneous actions. The common metarepresentational element explains why false belief tasks and the alternative naming task are mastered at the same time as children understand identity statements. (shrink)

This paper is an attempt at exploring the possibility of reconciling the two interpretations of biolinguistics which have been recently projected by Koster(Biolinguistics 3(1):61–92, 2009). The two interpretations—trivial and nontrivial—can be roughly construed as non-internalist and internalist conceptions of biolinguistics respectively. The internalist approach boils down to a conception of language where language as a mental grammar in the form of I-language grows and functions like a biological organ. On the other hand, under such a construal consistent with Koster’s (Biolinguistics (...) 3(1):61-92, 2009), the non-internalist version does not necessarily have to be externalist in nature; rather it is a matter of mutual reinforcement of biology and culture under the rubric of a co-evolutionary dynamics. Here it will be argued that the apparent dichotomy between these two conceptions of biolinguistics can perhaps be resolved if we have a richer synthesis that accounts for both internalism and non-internalism. (shrink)

Middle childhood, the period from 6 to 12 years of age, is defined socially by increasing autonomy and emotional regulation, somatically by the development of anatomical structures for subsistence, and endocrinologically by adrenarche, the adrenal production of dehydroepiandrosterone (DHEA). Here I suggest that DHEA plays a key role in the coordinated development of the brain and body beginning with middle childhood, via energetic allocation. I argue that with adrenarche, increasing levels of circulating DHEA act to down-regulate the release of glucose (...) into circulation and hence limit the supply of glucose which is needed by the brain for synaptogenesis. Furthermore, I suggest the antioxidant properties of DHEA may be important in maintaining synaptic plasticity throughout middle childhood within slow-developing areas of the cortex, including the insula, thamalus, and anterior cingulate cortex. In addition, DHEA may play a role in the development of body odor as a reliable social signal of behavioral changes associated with middle childhood. (shrink)