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III. TASK ANALYSIS

Our task analysis begins where McDonough and Strom’s ended in 2005.

As previously discussed, they conducted a HARs absence presence assessment

as part of their research. Their assessment revealed that psychomotor and

sensory perceptual tasks are not well replicated within a desktop / laptop VE CFF

simulation (McDonough & Strom, 2005).

A HARs assessment compares the execution of a real world task to the

execution of that task in a VE. The HARs assessment tool was developed in

2003 by Cockayne and Darken. It is summarized by the following quote:

The chapter begins with a discussion of taxonomic science and

classification as related to the development of the Human Ability

Requirements (HARs) taxonomy for human performance

evaluation. It discusses the extension of real-world taxonomy

method and tools into VEs and how these can be used to extend

and complement conventional task analyses. It is the linking of

human abilities as required by task components to interaction

techniques and devices that is of concern. Our research was based

on the need to understand how humans perform physical tasks in

the real world in order to guide the design and implementation of

interaction techniques and devices to support these tasks in VEs.

(Cockayne & Darken, 2003)

As desktop PCs typically use a mouse and a keyboard as the primary

human computer interface and tablet devices use a multi-touch touchscreen in

conjunction with accelerometers and gyroscopes as the primary human interface,

comparing the two systems based on input modalities is nontrivial. A HARs

assessment creates a framework that allows for the comparison of the two. The

difference in input modalities, particularly as they relate to simulated training

tasks, is the focus for our investigation.

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Asus W2W-A1 Guía de usuario Pagina 42