(2571) Mental arithmetic leads to multiple discrete changes from baseline in the firing patterns of human thalamic neurons.   Kim JH, Ohara S and Lenz FA.   2009.   Journal of Neurophysiology, volume 101, pages 2107-2119.

(2572) Looking on the bright side: biased attention and the human serotonin transporter gene.   Fox E, Ridgewell A and Ashwin C.   2009.   Proceedings. Biological Sciences / The Royal Society, volume 276, pages 1747-1751.

(2573) Individual differences in distance perception.   Jackson RE.   2009.   Proceedings. Biological Sciences / The Royal Society, volume 276, pages 1665-1669.

(2574) Evolution of trust and trustworthiness: social awareness favours personality differences.   McNamara JM, Stephens PA, Dall SR and Houston AI.   2009.   Proceedings. Biological Sciences / The Royal Society, volume 276, pages 605-613.

(2575) Emergence of cooperation in public goods games.   Kurokawa S and Ihara Y.   2009.   Proceedings. Biological Sciences / The Royal Society, volume 276, pages 1379-1384.

(2576) The evolution of judgement bias in indirect reciprocity.   Rankin DJ and Eggimann F.   2009.   Proceedings. Biological Sciences / The Royal Society, volume 276, pages 1339-1345.

(2577) Orienting to threat: faster localization of fearful facial expressions and body postures revealed by saccadic eye movements.   Bannerman RL, Milders M, de Gelder B and Sahraie A.   2009.   Proceedings. Biological Sciences / The Royal Society, volume 276, pages 1635-1641.

(2578) Parcellation of human temporal polar cortex: a combined analysis of multiple cytoarchitectonic, chemoarchitectonic, and pathological markers.   Ding SL, Van Hoesen GW, Cassell MD and Poremba A.   2009.   Journal of Comparative Neurology, volume 514, pages 595-623.

(2579) Cross-language analysis of phonetic units in language addressed to infants.   Kuhl PK, Andruski JE, Chistovich IA, Chistovich LA, Kozhevnikova EV, Ryskina VL, Stolyarova EI, Sundberg U and Lacerda F.   1997.   Science, volume 277, pages 684-686.

(2580) The evolution of teaching.   Thornton A and Raihani NJ.   2008.   Animal Behaviour, volume 75, pages 1823-1836.   With reference to anthropomorphism, notional teaching in animals requires consideration of the pecking order, which is conspicuous by its absence from this review. Relatedly, the timing of a parent's interaction with its offspring may reflect the parent's state of arousal, reduction of which may be of immediate benefit to the parent.