1. A method of analyzing the design preference tendencies of a group of selectors, the method comprising: (a) presenting, over an electronic network, to a plurality of selectors, one or more groups of decision objects having a plurality of combinations of attributes; (b) obtaining information from the plurality selectors indicative of a preference of the respective selectors from among the presented decision objects; (c) using the information to evolve or to select a derived group of decision objects comprising one or more different combinations of attributes; (d) iterating steps (a) through (c), using a derived group from step (c) to arrive at one or more preferred decision objects; and (e) using at least some information from step (b) to implement a conjoint analysis to gather information relevant to the attribute preferences of said selectors.