Direct observations of pandanus-tool manufacture and use by a New Caledonian crow (<Emphasis Type="Italic">Corvus moneduloides</Emphasis>)

New Caledonian crows are reported to have impressive pandanus-tool manufacture abilities. These claims are based on an extensive artefact record. However, inferring behavioural and cognitive abilities without direct observation of tool manufacture is problematic. Here we report (and document on video) direct observations of a crow making and using stepped pandanus tools at Pic Ningua. We observed (1) a bias for making tools on left edges consistent with that previously found at the site, (2) faithful manufacture of a stepped design with high overall congruence in the shapes of tools, (3) the use of convergent rips to first form the tapered end working away from the trunk then the wide end working towards the trunk, (4) appropriate functional use of stepped tools by use of the leaf-edge barbs to hook food from holes, and (5) consistent holding of tools on the left side of its head when using them. Our observations verify most of the claims based on the artefact record, but the crows exact manufacture technique was slightly different to that inferred previously.Electronic Supplementary Material Supplementary material is available in the online version of this article at     

Online versus offline processing of visual feedback in the control of movement amplitude

Researchers have suggested that visual feedback not only plays a role in the correction of errors during movement execution but that visual feedback from a completed movement is processed offline to improve programming on upcoming trials. In the present study, we examined the potential contribution of online and offline processing of visual feedback by analysing spatial variability at various kinematic landmarks in the limb trajectory (peak acceleration, peak velocity, peak negative acceleration and movement end). Participants performed a single degree of freedom video aiming task with and without vision of the cursor under four criterion movement times (225, 300, 375 and 450 ms). For movement times of 225 and 300 ms, the full vision condition was less variable than the no vision condition. However, the form of the variability profiles did not differ between visual conditions suggesting that the contribution of visual feedback was due to offline processes. In the 375 and 450 ms conditions, there was evidence for both online and offline control as the form of the variability profiles differed significantly between visual conditions.     

Evolutionary versus prototype analyses of the concept of disorder.

The harmful dysfunction (HD) analysis of the concept of disorder (J. C. Wakefield, 1992a) holds that disorders are harmful failures of internal mechanisms to perform their naturally selected functions. S. O. Lilienfeld and L. Marino (1995) proposed instead that disorder is a Roschian prototype concept without defining properties. Against the HD analysis, they argued that many disorders are not failures of naturally selected functions because they are either designed reactions (e.g., fever) or failures of functions that are not naturally selected (e.g., reading disorder). The HD analysis is defended here against these and other objections and compared with the Roschian account. It is argued that the objections are based on conceptual confusions and can be turned around to provide strong new support for the HD analysis. A series of conceptual experiments demonstrates the superior explanatory power of the HD analysis and disconfirms the Roschian account.     

Towards a New Religious Dialogue: Buddhism and Postmodern Theology

This paper proffers an example of a new form of religious dialogue. It subverts, rather than assumes the philosophical tradition of universal reason, upon which religious dialogue has traditionally proceeded. To this end, I call into question the frequently perceived affinity between Buddhism and radical postmodern a/theology. Whereas the latter works within a framework of oppositions inherited from the modern philosophical tradition, Buddhism is innocent of such a framework, and jettisons its 'either-or' antinomies. In this respect, I argue that there is a striking 'coincidence in outlook' between Buddhism and conservative postmodern theology, which also seeks to subvert the modern philosophical framework which it regards as being essentially secular. I suggest that this 'coincidence in outlook', which contrasts with the modern outlook, opens the way for a religious dialogue based on a mutual affirmation of difference, rather than on the distorting universalist quest for affinity at all costs.     

BOOKS Review

Legal Philosophies of Russian Liberalism . By Andrzej Walicki.
A History of Russian Philosophy , Edited by Valery A. Kuvakin.     

Why psychology needs conceptual analysts: Wachtel's “discontents” revisited

Commenting on Wachtel's “Investigation and its Discontents” [Wachtel, P. L. (1980). Investigation and its discontents: Some constraints on progress in psychological research. American Psychologist, 35, 399–408], I agree that lack of support for a career path of conceptual analysis and critique is a serious problem. Psychology requires a strong conceptual component because it is subject to unusual distortions and self-deceptions in theory formation and evidential evaluation due to issues of power, self-esteem, and social ideology. I agree with Wachtel that pressures for quantity of publication are detrimental to scientific quality, but dispute his suggestion that excessive focus on quantity in assessing productivity can be addressed by having tenure and promotion candidates submit only their three best papers. Such reviews must be based on the entire record, so improvements must involve journals’ acceptance standards. Regarding Wachtel's concern about the influence of grants on reviews, I argue that grants should be relevant only to the extent they bear on the candidate's scholarly goals.