Keywords: bicssc / Web graphics & design ; bicssc / Market research ; bicssc / User interface design & usability ; bicssc / Research & development management ; bicssc / Product design ; bicssc / Psychological methodology ; bicssc / Social research & statistics ; bisacsh / COMPUTERS / Design, Graphics & Media / General ; bisacsh / COMPUTERS / Internet / Web Design ; bisacsh / BUSINESS & ECONOMICS / Marketing / Research ; bisacsh / COMPUTERS / User Interfaces ; bisacsh / BUSINESS & ECONOMICS / Research & Development ; bisacsh / DESIGN / Product ; bisacsh / PSYCHOLOGY / Research & Methodology ; bisacsh / SOCIAL SCIENCE / Research ; Interview. ; Methode. ; Benutzerforschung. ; Interview ; Methode ; Benutzerforschung