Correction Appended

Several prominent scientists said yesterday that they had formed an organization dedicated to electing politicians “who respect evidence and understand the importance of using scientific and engineering advice in making public policy.”

Organizers of the group, Scientists and Engineers for America, said it would be nonpartisan, but in interviews several said Bush administration science policies had led them to act. The issues they cited included the administration’s position on climate change, its restrictions on stem cell research and delays in authorizing the over-the-counter sale of emergency contraception.

In a statement posted on its Web site (www.sefora.org), the group said scientists and engineers had an obligation “to enter the political debate when the nation’s leaders systematically ignore scientific evidence and analysis, put ideological interest ahead of scientific truths, suppress valid scientific evidence and harass and threaten scientists for speaking honestly about their research.”

The group’s organizers include John H. Gibbons and Neal Lane, who were science advisers in the Clinton administration, the Nobel laureates Peter Agre and Alfred Gilman, and Susan F. Wood, who resigned from the Food and Drug Administration last year to protest the agency’s delay in approving over-the-counter sales of the so-called Plan B emergency contraception.