4 CONCLUSIONS
We designed a user study to understand which con-
cepts for animated transitions could significantly im-
pact people’s perception of data changes in Stream-
ing Big Data. First, We designed a concept tree
from which we crafted different animated transitions.
Then, we chose six pairings of visual idioms, each
tested with seven different transitions, including the
No Animation and simple Fade cases. Finally, we
created several online questionnaires to test how ac-
curately people can understand dataset changes, tran-
sitions, and metrics.
We concluded that our concept tree is not enough
to design effective transitions in Streaming Big Data.
Although some of our results show high accuracy val-
ues, they are not as high or consistent as one might
want to ensure a good perception of the information
conveyed. Also, there were no significant differences
between transitions. Our main conclusion is that con-
ceiving appropriate vertical transitions for streaming
big data that allow users to understand the changes
in incoming data and act accordingly is not an easy
endeavor and should be careful covered in future re-
search. In particular, we argue that a concept tree for
animation design is needed as a tool to design and cre-
ate animated transitions. However, it should be fur-
ther explored.
ACKNOWLEDGEMENTS
This work was partially supported by FCT through
projects PTDC/CCI-CIF/28939/2017, UIDB/50021/
2020, SFRH/BD/143496/2019 and POCI-01-0145-
FEDER-030740 – PTDC/CCICOM/30740/2017.
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