Imitation of lateralised body movements: doing it the hard way

Two experiments examined imitation of lateralised body movement sequences presented at six viewing angles (0º, 60º, 120º, 180º, 240º, and 300º rotation relative to the participant’s body). Experiment 1 found that, when participants were instructed simply to ‘‘do what the model does’’, at all viewing angles they produced more actions using the same side of the body as the model (anatomical matches), than actions using the opposite side (anatomical non-matches). In Experiment 2 participants were instructed to produce either anatomical matches or anatomical non-matches of observed actions. When the model was viewed from behind (0º), the anatomically matching group were more accurate than the anatomically non-matching group, but the non-matching group was superior when the model faced the participant (180º and 240º). No reliable differences were observed between groups at 60º, 120º, and 300º. In combination, the results of Experiments 1 and 2 suggest that, when they are confronting a model, people choose to imitate the hard way; they attempt to match observed actions anatomically, in spite of the fact that anatomical matching is more subject to error than anatomical non-matching.

Eternal peace, perpetual war? A critical investigation into Kant's conceptualisations of war

Most discussions of Immanuel Kant's political theory of international politics focus on his work on Eternal Peace and its normative and empirical relevance for contemporary international relations and international law. Yet for all his concern with peace, Kant's work is characterised by a fascinating preoccupation with the concept of war and its role in human history. The purpose of this essay is to investigate critically Kant's different conceptualisations of war and to evaluate his writing as a critique against contemporary versions of Liberal war and peace, as well as recent attempts to reduce war to an immanent logic of biopolitics.

Mouse movements of motion-impaired users: a submovement analysis

Understanding human movement is key to improving input devices and interaction techniques. This paper presents a study of mouse movements of motion-impaired users, with an aim to gaining a better understanding of impaired movement. The cursor trajectories of six motion-impaired users and three able-bodied users are studied according to their submovement structure. Several aspects of the movement are studied, including the frequency and duration of pauses between submovements, verification times, the number of submovements, the peak speed of submovements and the accuracy of submovements in two-dimensions. Results include findings that some motion-impaired users pause more often and for longer than able-bodied users, require up to five times more submovements to complete the same task, and exhibit a correlation between error and peak submovement speed that does not exist for able-bodied users.

Beyond the "liberal peace"

The article critically reviews the contributions to the understanding of contemporary peacebuilding practices of several recent contributions to the peacebuilding literature, including the 2011 World Development Report. It examines some of the conceptual problems with recent criticisms of the "liberal peace", and proposes that the concept of "liberal peace" should be abandonned as it lacks any analytical purchase.

Political economy of state-building: power after peace

The purpose of this volume is to examine and evaluate the impact of international state-building interventions on the political economy of post-conflict countries over the last 20 years. It analyses how international interventions have shaped political and economic dynamics and structures – both formal and informal – and what kind of state, and what kind of state-society relations have been created as a result, through three different lenses: first, through the approaches taken by different international actors like the UN, the International Financial Institutions, or the European Union, to state-building; second, through detailed analysis of key state-building policies; and third, through a wide range of country case studies. Amongst the recurring themes that are highlighted by the book’s focus on the political economy of state-building, and that help to explain why international state-building interventions have tended to fall short of the visions of interveners and local populations alike are evidence of important continuities between war-time and “post-conflict” economies and authority structures, which are often consolidated as a consequence of international involvement; tensions arising from what are often the competing interests and values held by different interveners and local actors; and, finally, the continuing salience of economic and political violence in state-building processes and war-to-peace transitions. The book aims to offer a more nuanced understanding of the complex impact of state-building practices on post-conflict societies, and of the political economy of post-conflict state-building.

Cortical activation during executed, imagined, observed, and passive wrist movements in healthy volunteers and stroke patients

Motor imagery, passive movement, and movement observation have been suggested to activate the sensorimotor system without overt movement. The present study investigated these three covert movement modes together with overt movement in a within-subject design to allow for a fine-grained comparison of their abilities in activating the sensorimotor system, i.e. premotor, primary motor, and somatosensory cortices. For this, 21 healthy volunteers underwent functional magnetic resonance imaging (fMRI). In addition we explored the abilities of the different covert movement modes in activating the sensorimotor system in a pilot study of 5 stroke patients suffering from chronic severe hemiparesis. Results demonstrated that while all covert movement modes activated sensorimotor areas, there were profound differences between modes and between healthy volunteers and patients. In healthy volunteers, the pattern of neural activation in overt execution was best resembled by passive movement, followed by motor imagery, and lastly by movement observation. In patients, attempted overt execution was best resembled by motor imagery, followed by passive movement, and lastly by movement observation. Our results indicate that for severely hemiparetic stroke patients motor imagery may be the preferred way to activate the sensorimotor system without overt behavior. In addition, the clear differences between the covert movement modes point to the need for within-subject comparisons.

To eat or not to eat? Kinematics and muscle activity of reach-to-grasp movements are influenced by the action goal, but observers do not detect these differences

Recent evidence suggests that the mirror neuron system responds to the goals of actions, even when the end of the movement is hidden from view. To investigate whether this predictive ability might be based on the detection of early differences between actions with different outcomes, we used electromyography (EMG) and motion tracking to assess whether two actions with different goals (grasp to eat and grasp to place) differed from each other in their initial reaching phases. In a second experiment, we then tested whether observers could detect early differences and predict the outcome of these movements, based on seeing only part of the actions. Experiment 1 revealed early kinematic differences between the two movements, with grasp-to-eat movements characterised by an earlier peak acceleration, and different grasp position, compared to grasp-to-place movements. There were also significant differences in forearm muscle activity in the reaching phase of the two actions. The behavioural data arising from Experiments 2a and 2b indicated that observers are not able to predict whether an object is going to be brought to the mouth or placed until after the grasp has been completed. This suggests that the early kinematic differences are either not visible to observers, or that they are not used to predict the end-goals of actions. These data are discussed in the context of the mirror neuron system

Securing Peace in Europe, 1945-62: Thoughts for the Post-Cold War Era

Articles include: Beatrice Heuser: ‘Stalin as Hitler's Successor: Western Interpretations of the Soviet threat', pp. 17-40