Judgments of Proportion with Graphs: Object-Based Advantages

Les Estimations de Proportion dans les Graphes: Les Avantages à Base d’Objets

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Authors
  1. St-Cyr, O.
  2. Hollands, J.G.
Corporate Authors
Defence R&D Canada - Toronto, Toronto ONT (CAN)
Abstract
This study investigates whether a stacked bar's vertical arrangement or single-object properties underlies its accuracy for proportion judgments. We hypothesized that observers would be less accurate when stacked bars were separated than when they formed a single object. Thirty participants judged proportions with three different graph types: bars, stacked bars, and staggered stacked bars. Results showed that stacked bars produced smaller error than staggered stacked bars, while bars produced the greatest error. The results showed an object-based advantage for stacked bars, but a vertical arrangement advantage for staggered stacked bars over bars was also evident.

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Keywords
graphical perception;statistical graphics;bar graphs;stacked bar graphs;proportion judgment;object-based attention
Report Number
DRDC-TORONTO-SL-2003-095 — Scientific Literature
Date of publication
01 Jan 2003
Number of Pages
4
Reprinted from
Proceedings of the Human Factors and Ergonomics Society 47th Annual Meeting, 2003, p 1659-1662
DSTKIM No
CA030715
CANDIS No
529347
Format(s):
Electronic Document(PDF)

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