Aside from their Council representative, the asari have no politicians or elections, but a free-wheeling, all-inclusive legislature that citizens can participate in at will. Policy debates take place at all hours of the day, in official chat rooms and forums moderated by specially-programmed virtual intelligences . All aspects of policy are open to plebiscite at any time. In any given debate, the asari tend to lend the most credence to the opinions of any Matriarchs present, nearly always deferring to the experience of these millennia-old "wise women".
A study by Verhulst, Lodge & Lavine (2010) found that attractiveness and familiarity are strong predictors of decisions regarding who is put in a position of leadership. Judgments made following one-second exposures to side-by-side photos of two US congressional candidates were reasonably predictive of election outcomes. Attractiveness and familiarity were correlated with competence in this study. Candidates who appeared more attractive and familiar were also seen as more competent and were found more likely to be elected. Similar studies ( Palmer & Peterson 2012 ) found that even when taking factual knowledge into account, candidates who were rated as more attractive were still perceived as more knowledgeable. These results suggest that the halo effect greatly impacts how individuals perceive political knowledge and it demonstrates the powerful influence of the halo effect in politics.
Various medical scientists have studied possible trial effect ( clinical trial effect ) in clinical trials .    Some postulate that, beyond just attention and observation, there may be other factors involved, such as slightly better care; slightly better compliance/adherence ; and selection bias . The latter may have several mechanisms: (1) Physicians may tend to recruit patients who seem to have better adherence potential and lesser likelihood of future loss to follow-up . (2) The inclusion/exclusion criteria of trials often exclude at least some comorbidities ; although this is often necessary to prevent confounding , it also means that trials may tend to work with healthier patient subpopulations.