# Experimental investigation of effects of representations and contexts on comprehension and generation of line graphs

- Nana Kanzaki,
*Graduate School of Information Science, Nagoya University*
- Kazuhisa Miwa,
*Graduate School of Information Science, Nagoya University*

## Abstract

In this study, we investigated the representation effect in
comprehending graphs. Many previous studies have confirmed the representation
effect. In Experiment 1, we replicated the representation effect but using a set
of graphs each of which is completely identical from the other in its perceptual
characteristics. Participants drew a specific aspect of information from a line
graph depending on the relation of x-axis and z-legend of the graph. In
Experiment 2, participants were given a context for problem solving. The result
showed that participants read a graph based on a given context; and the
representation effect in comprehension was limited. In Experiment 3,
participants generated a line graph by themselves. The result showed that they
did not necessarily generate a consistent graph with a given context, and in
comprehension the requirement of a context has very strong effects similarly as
in Experiment 2.

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