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"Abstract The eective information processing (e.g. search, organi- zation) of the heterogeneous information spaces requires metadata layer above the resources. However, the acqui- sition of resource metadata and domain models are chal- lenging tasks. Here, the crowdsourcing has emerged as an alternative to expert-based and automated semantics acquisition approaches. One of its branches are the games with a purpose (GWAPs) which encapsulate the seman- tics acquisition tasks into the game processes. We analyze existing GWAPs and propose their classication. Fur- thermore we devised our own GWAP-based approaches. For acquisition of lightweight term relationship network, we devised a search query formulation game, usable also for specic domain models. For acquisition of (personal) image tags, we devised a card game, where players mem- orize positions of concealed cards and identify identical pairs. For validation of music metadata, we devised a multi-choice question-based game, where players identify tag sets that are characteristic to music tracks they hear. We also looked at the GWAPs from their design per- spectives. We present a design oriented classication sys- tem for GWAPs, adress several design issues recurring in GWAPs and present new design patterns to solve them"

from the abstract: "This thesis identifies the need for an advanced search function which takes into consideration the notions of purpose and contextual circumstance of using educational games in order for such a database to be of greater usefulness for users. This thesis presents a design of such a search function, based on the theories of Purushotma (2005), Pannese and Carlesi (2007), Charsky (2010) and Reinders and Wattana (2011). Furthermore this thesis provides an updated metadata model to support such a search function. In the future the search function could be polished from a usability perspective and further developed to incorporate other types of serious games."