We propose that in addition to children's requests for word names being a reflection of an understanding of the referential nature of words, they may also be requests for adult's teaching. These possible requests for teaching among toddlers, along with other indications, suggest that teaching may be a natural cognition that may be related to the development of theory of mind.

Schilbach et al.'s model assumes that the ability to “experience” minds is already present in human infants and therefore falls foul of the very intellectualist problems it attempts to avoid. We propose an alternative relational, action-based account, which attempts to grasp how the individual's construction of knowledge develops within interactions.

PURPLE (RED-and-BLUE) is the most frequently occurring derived (binary) basic color term (BCT), but there is never a named composite BCT meaning RED-or-BLUE. GREEN-or-BLUE is the most frequently named composite color category, but there is never a BCT for the corresponding derived (binary) category CYAN (BLUE-and-GREEN). Why?

Models of working memory challenge some aspects of Carruthers’ account but enhance others. Although the nature of the phonological store and central executive appear fully congruent with Carruthers’ proposal, current models of the visuo-spatial sketchpad provide a better account of skilled action. However, Carruthers’ model may provide a way around the homunculus problem that has plagued models of working memory.

Recent evidence from our lab indicates that LTP shares an important property with memory consolidation: it is consolidated by natural reinforcement. Nevertheless, the hypothesis, that LTP-like mechanisms or other forms of enhanced synaptic efficacy are basic elements in learning is not unequivocally supported. Skepticism aside, LTP is an accessible experimental model that is optimally equipped for the investigation of the cellular and molecular machinery involved in synaptic weight changes.

Three major attempts by Barsalou to specify what makes a perceptual symbol perceptual fail. One way to give such an account is to use symbols' causal/nomic relation to what they represent, roughly the way contemporary informational psychosemanticists develop their theories, but this fails to draw the distinction Barsalou seems to have in mind.

In the past decade many studies have demonstrated the existence of a mirror mechanism that matches the sensory representation of a biological stimulus with its somatomotor and visceromotor representation. This mechanism, likely phylogenetically very old, explains several types of mirroring behaviours, at different levels of complexity. The presence in primates of dedicated neuroanatomical pathways for specific sensorimotor integrations processes implies, at least in the primate lineage, a hard-wired mirror mechanism for social cognitive functions.

The “hijacking” and “drug instrumentalization” models of psychoactive drug use predict opposite outcomes in terms of adaptive behavior and fitness benefits. Which is the range of applicability of each model? To answer this question, we need more data than those reported by studies focusing on medical, psychiatric, and legal problems in addicted users. An evolutionary analysis requires a much wider focus.

Both autonomy and local specificity are compatible with observed interconnectivity at the cell level when considering two different levels: cell assemblies and brain systems. Early syntactic structuring processes in particular are likely to representan autonomous module in the language/brain system.

Computational models such as E-Z Reader and SWIFT are ideal theoretical tools to test quantitatively our current understanding of eye-movement control in reading. Here we present a mathematical analysis of word skipping in the E-Z Reader model by semianalytic methods, to highlight the differences in current modeling approaches. In E-Z Reader, the word identification system must outperform the oculomotor system to induce word skipping. In SWIFT, there is competition among words to be selected as a saccade target. We conclude that it is the question of competitors in the “game” of word skipping that must be solved in eye movement research.

Newell wanted a theory of cognition to abide by some explicit criteria, here called the Newell Test. The test differs from the Turing Test because it is explicit. The Newell Test will include the Turing Test if its characterization of cognition is complete. It is not. Its use here is open-ended: A system that does not pass it well invites improvement.

We designed an experiment to test the application of optimality theory (OT) in kinship terminology studies. Specifically, we examined the OT constraints within a set of behavioral data using Chinese kin terms. The results from this behavioral approach support and extend Jones' linguistic approach by identifying underlying cognitive mechanisms that can explain and predict behavioral responses in kinship identification.

People cannot make independent judgements of stimulus attributes and so “it is necessary to theorize in terms of stimulus structures” (Lockhead 1992, p. 551) rather than in terms of stimulus features. The new commentaries here further this statement and also support the observations in the target article that psychophysical scaling methods allow us to measure (1) how context determines judgments and (2) what people remember about prior stimuli.