Doctors in Massachusetts may be looking a bit more favorably on new payment methods created under state and federal laws, according to a survey of 1,095 practicing physicians by the Massachusetts Medical Society. About 49 percent of respondents said they are likely to participate in a voluntary global payment system. That’s up from 42 percent in 2011, the first year that questions about the new payment methods were included in the annual survey. Sixty percent of respondents, up from about half last year, said they are likely to participate in voluntary accountable care organizations.