Marc Hassenzahl, Daniel Ullrich. To do or not to do: Differences in user experience and retrospective judgments depending on the presence or absence of instrumental goals. Interacting with Computers, 19(4):429-437, 2007. [doi]
@article{HassenzahlU07,
title = {To do or not to do: Differences in user experience and retrospective judgments depending on the presence or absence of instrumental goals},
author = {Marc Hassenzahl and Daniel Ullrich},
year = {2007},
doi = {10.1016/j.intcom.2007.05.001},
url = {http://dx.doi.org/10.1016/j.intcom.2007.05.001},
researchr = {https://researchr.org/publication/HassenzahlU07},
cites = {0},
citedby = {0},
journal = {Interacting with Computers},
volume = {19},
number = {4},
pages = {429-437},
}