Effects of Individual Differences in Working Memory on Plan Presentational Choices

Area of Science:

• Human-computer interaction
• Cognitive psychology
• Information visualization

Background:

• Decision support systems require effective visualization interfaces.
• Individual user differences, particularly working memory, can influence visualization effectiveness.
• Presenting plans (sequences of actions) is crucial in domains like semi-autonomous logistics.

Purpose of the Study:

• To investigate the role of working memory in visualization design for decision support.
• To explore different presentational choices for visualizing plans (interactivity, aggregation, layout, emphasis).
• To develop and apply a novel methodology for evaluating visualization effectiveness.

Main Methods:

• Literature review on individual differences and visualization evaluation metrics.
• Experimental investigation of presentation variants (interactivity, aggregation, layout, emphasis).
• Dual-task paradigm measuring performance in task interleaving and situational awareness.

Main Results:

• Individual working memory capacity is a significant factor in visualization effectiveness.
• Emphasizing plan steps via highlighting borders can enhance primary task performance.
• The benefit of emphasis is contingent on controlling for individual working memory variations.

Conclusions:

• Visualization design for decision support must consider individual user differences, especially working memory.
• Tailoring presentation strategies based on working memory can optimize decision-making and processing.
• A layered-evaluation approach using dual-task paradigms provides robust insights into visualization effectiveness.