Dub music grew out of R&B.
Jean-Claude Falmagne -LRB- born February 4 , 1934 , in Brussels , Belgium -RRB- is a mathematical psychologist whose scientific contributions deal with problems in reaction time theory , psychophysics , philosophy of science , measurement theory , decision theory , and educational technology .. Brussels. Brussels. Belgium. Belgium. philosophy of science. philosophy of science. decision theory. decision theory. Together with Jean-Paul Doignon , he developed knowledge space theory , which is the mathematical foundation for the ALEKS software for the assessment of knowledge in various academic subjects , including K-12 mathematics , chemistry , and accounting .. mathematics. mathematics. knowledge space theory. knowledge space. ALEKS. Aleks