[The new nursing professions in psychiatry: One man's dream, another man's nightmare?] / Les nouvelles professions infirmières en psychiatrie, rêve des uns, cauchemar des autres ?

The deployment of case management and advanced nursing practice is shaking up the roles of the various professionals on mental health teams, and the usual organization of care in psychiatry. These changes can be perceived as either positive or worrying, depending on each individual's role and position. For the past 3 years, the mobile teams of the Centre rive gauche cluster at Le Vinatier hospital have been organized according to the principles of Flexible Assertive Community Treatment, and include an advanced practice nurse (APN) on their staff. The roles of the case manager and the APN have been rethought. A number of measures have facilitated the implementation of these new functions.

Strong perceptual consequences of low-level visual predictions: A new illusion.

Predicting information is considered to be an efficient strategy to minimise processing costs by exploiting regularities in the environment, and to allow for adaptation in case of irregularities, i.e. prediction errors. How such errors impact conscious perception is unclear, especially when predictions concern elementary visual features. Here we present results from a novel experimental approach allowing us to investigate the perceptual consequences of violated low-level predictions about moving objects. Observers were presented with two squares moving towards each other with a constant speed, and reported whether they were in contact or not before they disappeared. A compelling illusion of a gap between the squares occurred when the leading edges of those squares contacted briefly. The apparent gap was larger than a physical and stable separation of 2.6 min of arc between the squares. The illusion disappeared only when the contact did not violate extrapolations of the contrast edge between the moving object and the background. The pattern of results is consistent with an early locus of the effect and cannot be explained by decisional biases, guesses, top-down, attentional or masking effects. We suggest that violations of the contrast edge extrapolation in the direction of motion have strong perceptual consequences.