You tried going to https://studiolab.ide.tudelft.nl/studiolab/persuasivegamedesign/studiolab/persuasivegamedesign/2012/09/21/engaging-senior-users/onet.pl, and it doesn't exist. All is not lost! You can search for what you're looking for.
https://studiolab.ide.tudelft.nl/studiolab/persuasivegamedesign/studiolab/persuasivegamedesign/2012/09/21/engaging-senior-users/onet.pl
contact: Valentijn Visch