Paper Reading #1 : Imaginary Interfaces: Spatial Interaction with Empty Hands and without Visual Feedback

Reference
Authors: Sean Gustafson, Daniel Bierwirth and Patrick Baudisch
Affiliation: Hasso Plattner Institute ,Potsdam, Germany
Presentation: UIST’10, October 3–6, 2010, New York, New York, USA.

Summary
Hypothesis/Contents
The research was trying to find to what extent users can interact spatially with a user interface that exists only in their imagination.
Furthermore for the three different user studies he hypothesized the following things.

1) Mistakes performed by participants would be fewer than what has been previously reported.
2) Intermitted actions affect visual memory and thus reduce accuracy.
3) As the distance between the index finger and thumb grew,error would grow in pointing to the correct point.

Methods
Three different user studies that involved creating simple drawings, annotating existing drawings and pointing at spaces denoted in imaginary spaces were used to test the hypothesis.
The users were asked to draw various graffiti, draw and return to find the same point drawn. Then they would find points in an imaginary grid extending from their non-dominant hand.

Results:
The findings suggested that users’ visual short-term memory can, in part, replace the feedback conventionally displayed on a screen. Some people were better at drawing coordinates than others. Furthermore, the rotation between interactions and the increased number of strokes reduced the efficiency of the system.

Discussion
The paper presents a new way of interaction based on imaginary user interface supported by user's short term memory.This is something that is novice in field of communications and has not be streamlined for the general use of people. It does show a lot of promise for short term communications, but at the same time it cannot truly replace longer forms of communications and interactions that require visual displays and non human memory.
Further-work on these systems that can let users share those spatial drawings instantly to someone else nearby as imagined by creator but not on a computer screen but as an imagination stint can probably be more applicable in world without displays.



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