Foraging for spatial information: Patterns of orientation learning using desktop virtual reality

The purpose of the study was to provide a description of how learners use desktop VR systems for orientation learning that instructional designers could use to improve the technology. The study used a mixed method, content analysis approach based on a theoretical framework that included principles of self-regulated learning (SRL) and orientation learning. Twelve participants used desktop virtual reality (VR) systems to explore the virtual surround of a residential space. A screen-recording program captured participants' navigation movements and think-aloud verbalizations. Participants' recorded think-aloud verbalizations were coded to identify the orientation learning and SRL events they used during the session. Analysis of the participant movement data revealed that eight of the participants generally moved in a single direction through the surround, whereas the remaining four moved in a direction and then reversed that direction. Movement patterns of some participants were found to be different at the beginning and end of their VR session, and some participants tended to navigate through certain areas of the surround more slowly than through other areas. Some participants tended to view the scene at a constant field of view level, whereas other varied the level. Additionally, some participants tended to view a particular area of the scene with narrower or wider fields of view, but others varied the field of view level across the scene. A model of orientation learning events was derived from content analysis of the think-aloud transcripts showing that participants engaged in four major types of learning categories: identifying, locating, regulating, and contextualizing. Participants were classified into four groups according to relative frequency distributions of the event categories. The study concluded that use of SRL events varied amongst the participants, and that the participant used a diverse set of movement and learning event patterns. Further conclusions noted that virtual scene objects possessed meaning for learners, and that thought verbalizations indicated that some of the learners attained a sense of presence in the VR environment. Finally, the study concluded that qualitative techniques such as thought verbalizations may provide a new paradigm for measuring presence in virtual environments

Navigational patterns in interactive multimedia

The central purpose of this thesis is to investigate whether users have distinct preferences for specific navigational patterns in multimedia: that is preferences for moving through multimedia. Subsidiary questions are whether users have preferences for working strategies, (the mental approach to investigating software) whether these preferences are similar for specific groups and whether these preferences are affected by the software's system and navigational design. Four groups were investigated within two ranges: children to adults, and novices to experts. The literature review revealed four different perspectives of investigating navigation: user, designer, pedagogy and human computer interaction and although this research concentrates on the first two perspectives the other two are integral and of equal importance.Two empirical studies elicited the navigational information. The first studied pairs of children undertaking set tasks in multimedia, and demonstrated that although each pair had definite preferences, each group did not utilise the full pattern range discerned from the observations, literature review and multimedia package analysis. The second study was redesigned using individual adults to ascertain the full range of preferred patterns in use. The essential element from the investigations was the wide range of variation between individuals and within groups. There was a gradual progression in their range and speed using these patterns, related to their skills, abilities and experience, and each individual could be placed along a continuum. Topologies of the multimedia packages and diagrams of the fit of the navigation patterns were included. Finally an expert panel was convened to verify the pattern range and their comments supported the new classification.The research outcomes included navigational patterns and working strategies classifications, future techniques for designers, and user methods. These will create more successful and informed multimedia, and forward developments and improvements in the design of high quality user preference software

Usability of hypertext : factors affecting the construction of meaning

One type of hypertext application, information retrieval, has become increasingly popular and accessible due to the explosion of activity occurring on the World Wide Web. These hypertext documents are referred to as web sites. Readers can now access a multitude of web sites and retrieve a wide variety of information. The uniqueness of a hypertext document centers around the concept that text is broken into an array of non-sequential text chunks, or nodes, which are connected through links. The hypertext reading can be considered an interactive experience requiring the reader to effectively navigate the document. The potentially complex link and node structure awaiting hypertext readers can lead them into becoming lost in hyperspace Usable hypertext design will maximize document coherence and minimize readers\u27 cognitive overhead, allowing readers to create an accurate mental model of the hypertext structure. Usability testing is designed to determine how easily the functionality of a particular system can be used, In this case, the system under investigation is New Jersey Institute of Technology\u27s web site. The usability of a hypertext document is affected by design elements which contribute to the content and structure of the hypertext. These design elements include good navigation aids, clear link labels, and consistent page layout

Adaptive hypertext and hypermedia : workshop : proceedings, 3rd, Sonthofen, Germany, July 14, 2001 and Aarhus, Denmark, August 15, 2001

This paper presents two empirical usability studies based on techniques from Human-Computer Interaction (HeI) and software engineering, which were used to elicit requirements for the design of a hypertext generation system. Here we will discuss the findings of these studies, which were used to motivate the choice of adaptivity techniques. The results showed dependencies between different ways to adapt the explanation content and the document length and formatting. Therefore, the system's architecture had to be modified to cope with this requirement. In addition, the system had to be made adaptable, in addition to being adaptive, in order to satisfy the elicited users' preferences

Adaptive hypertext and hypermedia : workshop : proceedings, 3rd, Sonthofen, Germany, July 14, 2001 and Aarhus, Denmark, August 15, 2001

This paper presents two empirical usability studies based on techniques from Human-Computer Interaction (HeI) and software engineering, which were used to elicit requirements for the design of a hypertext generation system. Here we will discuss the findings of these studies, which were used to motivate the choice of adaptivity techniques. The results showed dependencies between different ways to adapt the explanation content and the document length and formatting. Therefore, the system's architecture had to be modified to cope with this requirement. In addition, the system had to be made adaptable, in addition to being adaptive, in order to satisfy the elicited users' preferences

The influence of nodes sequence and extraneous load induced by graphical overviews on hypertext learning

Bezdan, E., Kester, L., & Kirschner, P. A. (2013). The influence of nodes sequence and extraneous load induced by graphical overviews on hypertext learning. Computers in Human Behavior, 29(3), 870-880.The effects of four hypertext learning environments with a hierarchical graphical overview were studied on the coherence of the node sequence, extraneous load and comprehension. Navigation patterns were influenced by the type of overview provided (i.e., dynamic, static) and whether navigation was restricted (i.e., restricted, non-restricted). It was hypothesised that redundant use of the overview for inducing a high-coherence reading sequence would result in high extraneous load and low comprehension. Coherence was higher in the dynamic than in the static conditions. Coherence was also higher in the restricted than in the non-restricted conditions. Mental effort as a measure of extraneous load was higher at the end than at the beginning of the learning phase, especially in the dynamic restricted and the static non-restricted conditions, although there was no significant interaction. Comprehension was lowest in the dynamic restricted condition and highest in the dynamic non-restricted and static restricted conditions. Low comprehension in the dynamic restricted condition indicates that overviews can become redundant for reading sequence coherence, negatively impacting comprehension. The evidence suggests that severe restriction of navigation paths should be avoided and that continuous use of overviews such as in dynamic overviews may be detrimental to learning

Computer detection of spatial visualization in a location-based task

An untapped area of productivity gains hinges on automatic detection of user cognitive characteristics. One such characteristic, spatial visualization ability, relates to users’ computer performance. In this dissertation, we describe a novel, behavior-based, spatial visualization detection technique. The technique does not depend on sensors or knowledge of the environment and can be adopted on generic computers. In a Census Bureau location-based address verification task, detection rates exceeded 80% and approached 90%

Assisted Viewpoint Interaction for 3D Visualization

Many three-dimensional visualizations are characterized by the use of a mobile viewpoint that offers multiple perspectives on a set of visual information. To effectively control the viewpoint, the viewer must simultaneously manage the cognitive tasks of understanding the layout of the environment, and knowing where to look to find relevant information, along with mastering the physical interaction required to position the viewpoint in meaningful locations. Numerous systems attempt to address these problems by catering to two extremes: simplified controls or direct presentation. This research attempts to promote hybrid interfaces that offer a supportive, yet unscripted exploration of a virtual environment.Attentive navigation is a specific technique designed to actively redirect viewers' attention while accommodating their independence. User-evaluation shows that this technique effectively facilitates several visualization tasks including landmark recognition, survey knowledge acquisition, and search sensitivity. Unfortunately, it also proves to be excessively intrusive, leading viewers to occasionally struggle for control of the viewpoint. Additional design iterations suggest that formalized coordination protocols between the viewer and the automation can mute the shortcomings and enhance the effectiveness of the initial attentive navigation design.The implications of this research generalize to inform the broader requirements for Human-Automation interaction through the visual channel. Potential applications span a number of fields, including visual representations of abstract information, 3D modeling, virtual environments, and teleoperation experiences