  Journalists and visualization designers include visualizations in their
articles and storytelling tools to deliver their message effectively. But
design decisions they make to represent information, such as the graphical
dimensions they choose and the viewer's familiarity with the content can impact
the viewer's perceived credibility of charts. Especially in a context where
little is known about sources of online information. But there is little
experimental evidence that designers can refer to make decisions. Hence, this
work aims to study and measure the effects of graphical dimensions and people's
familiarity with the content on viewers' perceived chart credibility. I plan to
conduct a crowd-sourced study with three graphical dimensions conditions, which
are traditional charts, text annotation, and infographics. Then I will test
these conditions on two user groups, which are domain experts and non-experts.
With these results, this work aims to provide chart guidelines for visual
designers with experimental evidence.
