 Therein, she subjected the common linguistic tropes of visual representation, including "window," "screen", and "the virtual" to rigorous analysis, analysis that in many cases rendered commonly accepted definitions inadequate.Drawing on philosophical and theoretical texts ranging from the art historian Erwin Panofsky to poststructuralists like Derrida, Friedberg proposed that forms of static-image, moving-image, and computer-modeled representation represented significantly different systems susceptible to rigorous analysis.Several of Friedberg's proposals lay at the center of a larger movement to more precisely and sustainedly interrogate and integrate philosophical, "theoretical" (notably post-structural and French), and art-historical investigations of the nature of human representations and their roots in historical and cultural contexts.