Learning to cooperate without awareness in multiplayer minimal social situations

a b s t r a c t Experimental and Monte Carlo methods were used to test theoretical predictions about adaptive learning of cooperative responses without awareness in minimal social situations-games in which the payoffs to players depend not on their own actions but exclusively on the actions of other group members. In Experiment 1, learning occurred slowly over 200 rounds in a dyadic minimal social situation but not in multiplayer groups. In Experiments 2-4, learning occurred rarely in multiplayer groups, even when players were informed that they were interacting strategically and were allowed to communicate with one another but were not aware of the game's payoff structure. Monte Carlo simulation suggested that players approach minimal social situations using a noisy version of the win-stay, lose-shift decision rule, deviating from the deterministic rule less frequently after rewarding than unrewarding rounds

Evidence-based guidelines for treating bipolar disorder: revised third edition recommendations from the British Association for Psychopharmacology

The British Association for Psychopharmacology guidelines specify the scope and targets of treatment for bipolar disorder. The third version is based explicitly on the available evidence and presented, like previous Clinical Practice Guidelines, as recommendations to aid clinical decision making for practitioners: it may also serve as a source of information for patients and carers, and assist audit. The recommendations are presented together with a more detailed review of the corresponding evidence. A consensus meeting, involving experts in bipolar disorder and its treatment, reviewed key areas and considered the strength of evidence and clinical implications. The guidelines were drawn up after extensive feedback from these participants. The best evidence from randomized controlled trials and, where available, observational studies employing quasi-experimental designs was used to evaluate treatment options. The strength of recommendations has been described using the GRADE approach. The guidelines cover the diagnosis of bipolar disorder, clinical management, and strategies for the use of medicines in short-term treatment of episodes, relapse prevention and stopping treatment.The use of medication is integrated with a coherent approach to psychoeducation and behaviour change

Aging and the interaction between education, retirement and the working life

Population aging and the burden it imposes on state finances is one of the major economic challenges governments around the world face. Responses are formulated in terms of either increasing employment (for example by raising the retirement age) or increasing productivity (investment in education). This paper brings together these two responses in a unified framework and shows how the individual's education and retirement decisions are affected by population aging - caused either by a fall in the population growth rate, or an increase in life expectancy - and the budget balancing mechanism of the public pension systems. We discuss how a budget balancing mechanism can be informed by fairness considerations and we show that early retirement can be the result of the application of Musgrave's rule in response to a fall in fertility

Aging and the interaction between education, retirement and the working life

Population aging and the burden it imposes on state finances is one of the major economic challenges governments around the world face. Responses are formulated in terms of either increasing employment (for example by raising the retirement age) or increasing productivity (investment in education). This paper brings together these two responses in a unified framework and shows how the individual’s education and retirement decisions are affected by population aging – caused either by a fall in the population growth rate, or an increase in life expectancy - and the budget balancing mechanism of the public pension systems. We discuss how a budget balancing mechanism can be informed by fairness considerations and we show that early retirement can be the result of the application of Musgrave’s rule in response to a fall in fertility

Magnocellular facilitation of flanked-letter identification disappears with strong flanker interference

Previously, we obtained evidence to suggest that the magnocellular system may reduce interference from flankers during flanked-letter identification. To understand this phenomenon better, we combined the data of our previous experiments, which all used the same flanking letter, and focused on the different target letters that were used. The new analysis showed that after an initial increase, magnocellular facilitation decreased and ultimately disappeared, as the target–flanker combination's level of interference increased. The initial increase was partly while the later decrease was fully replicated in two new experiments that focused on two different target letters while manipulating flanker identity. The outcome of a third new experiment studying the type of interference reduced suggested that although crowding contributed to total interference, it was insensitive to magnocellular mediation. Our results may be understood to reflect the involvement of the magnocellular system in an attentional-selection mechanism that is silenced by surround suppression

Magnocellular involvement in flanked-letter identification relates to the allocation of attention

Contains fulltext : 64675.pdf (publisher's version ) (Closed access)To verify the hypothesis that the magnocellular system is important to flanked-letter identification [Neuropsychologia 40 (2002) 1881] because it subserves attention allocation, we conducted three letter-naming experiments in which we manipulated magnocellular involvement (colour vs. luminance contrast) and prior information regarding target-letter location. Location information was provided through constant presentation at the same location (Experiment 1) or through auditory precueing (Experiments 2 and 3). In control conditions, either no (Experiments 1 and 3) or invalid (Experiment 2) location information was given. In line with the hypothesis, magnocellular input helped flanked-letter identification only when no prior location information was given