The development of interpersonal strategy: Autism, theory-of-mind, cooperation and fairness

Mentalising is assumed to be involved in decision-making that is necessary to social interaction. We investigated the relationship between mentalising and three types of strategic games - Prisoners' Dilemma, Dictator and Ultimatum - in children with and without autistic spectrum disorders. Overall, the results revealed less dramatic differences than expected among the normally developing age groups and the children with autism, suggesting that in these laboratory tasks, mentalising skills are not always necessary. There were, nonetheless, some important findings. Young children were more cautious about initiating cooperation than their older peers and, in bargaining situations, they were less generous in their opening unilateral grants and over-solicitous of an empowered receiver. Participants with autism did have a harder time shifting strategy between versions of the Prisoners' Dilemma, and they were much more likely to accept low initial offers in the Ultimatum game and to refuse fair proposals. In addition, participants' measured mentalising abilities explain intentional and strategic behaviour within the prisoners' dilemma and the avoidance of unsuccessful ultimatum proposals

A note on the earth-stretching approximation for Love waves

Earth-flattening transformations provide an efficient means for computing Love-wave dispersion and torsional normal mode frequencies in radially heterogeneous, spherically symmetric earth models. These transformations involve simple algebraic sealing factors applied to solutions for SH waves in a layered half-space. They result in considerable computational savings over solutions expressed directly in spherical geometry. Several earth-flattening transformations for SH waves are described in the literature (Anderson and Toksöz, 1973; Sato, 1968; Biswas and Knopoff, 1970). Chapman (1973) has examined the general class of power-law earth-flattening transformations and their application to body-wave problems

Spatial Distribution of Pleistocene and Holocene Faunal Remains, South Block Excavations

The fossil remains of mammoth and other Pleistocene fauna found along and near the escarpment of the west shore of Lima Reservoir in Centennial Valley have been the subject of field investigations since the 1980s. Summaries or earlier studies conducted at the locality are presented in various published and unpublished sources including Albanese, Davis, and Hill (1995), Bump (1995), Davis and Batten (1996), Dundas (1989, 1990, 1996), Hill and Albanese (1996), and Hill, Davis, and Albanese (1995)

In vivo neurophysiological recordings from geniculate ganglia: taste response properties of individual greater superficial petrosal and chorda tympani neurones

Coding of gustatory information is complex and unique among sensory systems; information is received by multiple receptor populations located throughout the oral cavity and carried to a single central relay by four separate nerves. The geniculate ganglion is the location of the somata of two of these nerves, the greater superficial petrosal (GSP) and the chorda tympani (CT). The GSP innervates taste buds on the palate and the CT innervates taste buds on the anterior tongue. To obtain requisite taste response profiles of GSP neurones, we recorded neurophysiological responses to taste stimuli of individual geniculate ganglion neurones in vivo in the rat and compared them to those from the CT. GSP neurones had a distinct pattern of responding compared to CT neurones. For example, a small subset of GSP neurones had high response frequencies to sucrose stimulation, whereas no CT neurones had high response frequencies to sucrose. In contrast, NaCl elicited high response frequencies in a small subset of CT neurones and elicited moderate response frequencies in a relatively large proportion of GSP neurones. The robust whole‐nerve response to sucrose in the GSP may be attributable to relatively few, narrowly tuned neurones, whereas the response to NaCl in the GSP may relate to proportionately more, widely tuned neurones. These results demonstrate the diversity in the initial stages of sensory coding for two separate gustatory nerves involved in the ingestion or rejection of taste solutions, and may have implications for central coding of gustatory quality and concentration as well as coding of information used in controlling energy, fluid and electrolyte homeostasis

Comment on 'Non-equilibrium thermodynamics of light absorption'

A recent paper by Meszéna and Westerhoff (1999 J. Phys. A: Math. Gen. 32 301) has aimed to address what is referred to as a principal question of biological thermodynamics, the possibility of describing photosynthesis in terms of non-equilibrium thermodynamics. The issue is associated with a misrepresentation of the fundamental photophysics involved, and as a result the analysis is invalid