In its generic form, a social dilemma poses a conflict between private and collective interests. People are often faced, however, with a conflict between private, (sub)group, and collective interests. This study examines participants' simultaneous weighing of these 3 nested interests. The results show that increasing the salience of social categorization of any level of the hierarchy (i.e., 6 individuals, 2 subgroups. 1 collective) increases participants' concern for and contributions to the corresponding level of interest (Experiment 1). One can promote concern for and contributions to the collective interest, which are lowest under categorization as 2 subgroups, by individuating the members of the individuals' own subgroup and/or the opposing subgroup (Experiment 2) and by cross-categorization with the opposing subgroup (Experiment 3).
The neuromuscular blocking effects of Org 9426, the 2-morpholino, 16-allyl-pyrrolidino derivative of the 3-desacetoxy analogue of vecuronium have been investigated in anaesthetized patients. Based on data from a pilot study, two doses, 250 and 500 micrograms kg-1 (estimated as the ED90 and 2 x ED90, respectively) were chosen. Org 9426 appeared to be six to eight times less potent than vecuronium and showed a faster rate of development of neuromuscular block, with good to excellent intubation conditions within 60 s after administration of a dose of 500 micrograms kg-1. The duration of action and the recovery index appeared to be similar to those of vecuronium. Side effects were not noted. Org 9426 may have advantages over existing non-depolarizing neuromuscular blocking agents with respect to rate of development of good intubating conditions, and is stable in aqueous solutions.
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