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Dirk Vorberg (born July, 5, 1942 in Stettin) is a German mathematical and cognitive psychologist.

He studied Psychology at the Universities of Marburg and Hamburg, and received his PhD in 1970 from Darmstadt Technical University. From 1970–1983 he worked at the university of Konstanz, from 1975 as professor of experimental and mathematical psychology. He moved to Marburg as professor of experimental psychology in 1983, and to Braunschweig (1990–2007). Since 2008, he is holding a guest professorship at the University of Muenster.

Vorberg was postdoctoral fellow at NYU (1972-1973), and worked as guest scientist at the Bell Labs (1979-1980), the Max-Planck Institute of Psycholinguistics, Nijmegen (1988-1989), Potsdam University (1997), and Maastricht University (2000-2001).

Vorberg works on visual attention, subliminal visual perception, executive control, numerical cognition, on mathematical modeling of cognitive processes, and of rhythm perception and timing in music performance. He combines experimental research with mathematical modelling of behavioral data, e.g., in the study by Levelt et al. (1991) on lexical access in speech production, and in his work (with Mattler, Heinecke, Schmidt and Schwarzbach) on the effects of subliminal visual stimuli on subsequent action. This research showed that conscious awareness of such stimuli is irrelevant for their impact on the speed of such action responses.