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The Evolution of Cerebrotypes in Birds
The first demonstration of similar cerebrotypes in birds is presented, using principal component analysis and hierarchical clustering methods to analyze a data set of 67 species, and it is demonstrated that five main cerebrotype can be recognized. Expand
Communication in discrete action-response games
Abstract I present a simple game, the Basic Action-Response game, which allows investigation of the claim that signals must be costly to be reliable. The Basic Action-Response game is the simplestExpand
Finger length ratio (2D:4D) correlates with physical aggression in men but not in women
The results are consistent with the hypothesis that testosterone has an organizational effect on adult physical aggression in men and women and no correlation between finger length ratio and any form of aggression in females is found. Expand
Changing philosophies and tools for statistical inferences in behavioral ecology
It is emphasized the necessity of moving away from a heavy reliance on statistical significance while focusing attention on biological relevance and effect sizes, with the recognition that uncertainty is an inherent feature of biological data. Expand
How Are Autism and Schizotypy Related? Evidence from a Non-Clinical Population
Novel evidence is provided for an autism-positive schizotypy axis, and the importance of recognizing that psychological variation involving reduced social interest and functioning may have diverse causes is highlighted. Expand
Exploration of a novel space is associated with individual differences in learning speed in black-capped chickadees, Poecile atricapillus
It is found that birds that readily enter a novel environment learn an acoustic discrimination task faster than birds that do not readily enterA novel environment. Expand
Resource holding potential, subjective resource value, and game theoretical models of aggressiveness signalling.
  • P. Hurd
  • Psychology, Medicine
  • Journal of theoretical biology
  • 7 August 2006
It is concluded that empirical examples of "aggressiveness" are far more likely to represent long-term differences in subjective resource value than game theoretical models of agonistic communication. Expand
A strategic taxonomy of biological communication
The rapid increase in the understanding of biological communication has been largely theory driven. Game-theoretical models have completely changed how behavioural biologists think aboutExpand
Aggression, sex and individual differences in cerebral lateralization in a cichlid fish
Evidence is presented that the strength of lateralization is linked to a behavioural trait, aggressiveness, in the convict cichlid (Archocentrus nigrofasciatus), and that this relationship depends on the sex of the fish. Expand
Aggression, Digit Ratio and Variation in Androgen Receptor and Monoamine Oxidase A Genes in Men
It is concluded that more masculine-typical 2D:4D does not reflect greater sensitivity to testosterone through variation in this locus on the AR gene, and that AR alleles conferring greaterensitivity to testosterone are associated with lower, not higher propensity to aggression. Expand