This research aims to show that interfirms retionships shouldn't be only analysed according to economical dimensions and should take into account informational specificities. Some interorganisational collaborations, called "cognitive communities", are not interested in the production of market products and services : they are built upon their abilities to create favorable informational and decisional situations. Based on a "Structural Equations" analysis ("Path Analysis"), three of those french cognitive communities have been studied. Results reveal the importance of attention and decision processes when studying the partnership satisfaction.