Three signs ('No Smoking' and 'Project Titan') as used at the Biosignal Laboratory at the Institute of Psychiatry, London, England, established by Professor Hans Eysenck and Dr Paul Barrett to conduct psychological investigations into the relationship between psychophysical and psychometric measures; 1988-1994. Three signs ('No Smoking' and 'Project Titan') as used at the Biosignal Laboratory at the Institute of Psychiatry 1988-1994