Socially cued anticipatory adjustment of female signalling effort in a moth

Juvenile population density has profound effects on subsequent adult development, morphology and reproductive investment. Yet, little is known about how the juvenile social environment affects adult investment into chemical sexual signalling. Male gumleaf skeletonizer moths, Uraba lugens, facultatively increase investment into antennae (pheromone receiving structures) when reared at low juvenile population densities, but whether there is comparable adjustment by females into pheromone investment is not known. We investigate how juvenile population density influences the ‘calling' (pheromone-releasing) behaviour of females and the attractiveness of their pheromones. Female U. lugens adjust their calling behaviour in response to socio-sexual cues: adult females reared in high juvenile population densities called earlier and for longer than those from low juvenile densities. Juvenile density also affected female pheromonal attractiveness: Y-maze olfactometer assays revealed that males prefer pheromones produced by females reared at high juvenile densities. This strategic investment in calling behaviour by females, based on juvenile cues that anticipate the future socio-sexual environment, likely reflects a response to avoid mating failure through competition with neighbouring signallers.

Anticipatory Defocusing of Attention and Contextual Response Priming but No Role of Aesthetic Appreciation in Simple Symmetry Judgments when Switching between Tasks

Visual attention can be adjusted to task requirements. We asked participants to switch between judging the symmetry of vertically presented three-letter strings and identifying the central stimulus (i.e., Eriksen task) to investigate anticipatory adjustment of attention. Our experiments provide evidence for anticipatory adjustment of visual attention, depending on the cued task (i.e., focusing and defocusing of attention after the Eriksen task cue and after the symmetry task cue, respectively). Although, symmetry judgments were, overall, considerably slower than the identification of the central letter, the effects of response congruency between tasks were comparable in the two tasks, which suggested strong response priming from concurrent symmetry judgment in Eriksen task trials. Symmetry judgment performance was best for homogeneous letter strings (e.g., HHH), worst for strings that were symmetrical and inhomogeneous (e.g., XHX), and intermediate for asymmetrical strings (e.g., HHX). The difficulty of categorizing symmetrical-inhomogeneous items markedly deviated from the aesthetic ratings of the stimuli, displaying a pronounced preference for symmetrical strings, but only little difference among the symmetrical items, and might be accounted by conflict with response priming based on inhomogeneity detection. Although our study provides little evidence for an effect of aesthetic appreciation in simple symmetry judgments, it demonstrates the strong role of contextual dependencies.

Cutting across doctrines: positive adjustment in Japan

Japan's economy keeps changing too fast, its economic policies are too active and independent, and its domestic structures seemingly deviate too much from Western patterns to conform to theories that rely on general equilibrium in mature economies. Static economics, including recent monetarist, supply-side, and rational expectations models, some aspects of dynamic and development economics, and most of the neoliberal current in international relations theory are seriously challenged. On the other hand, the mercantilist paradigm, theories focusing on the role of the state, and analyses exclusively adopting the subsystemic level of international relations theory have substantial problems with the ample evidence of adaptation to external factors, the dynamism and Schumpeterian qualities of Japanese private enterprises and the far-reaching liberalization of Japan's foreign-exchange and foreign-trade control regime. As the only OECD member to have pursued “anticipatory adjustment” on the macrolevel and as the obvious model for the OECD category of “positive adjustment,” Japan presents a case of universal relevance. It suggests propositions linking targets and instruments of quantitative and qualitative policies, as well as processes of internalization of global factors and externalization of domestic factors. It provides material for revising, extending, and integrating international relations theory and the theory of economic policy.