The visit to St. Thomas Lutheran church also reminded me a paper that I wrote a while ago before I came to the program. It might be interesting to share. You may find it interesting that it was written by the me who was not in the HCI program and not knowing anything about the design methodology yet ^^
Designing expressive computer
How could we develop expressive computer products that are able to deliver intended expressions to the users? An expressive product ensures users perceive the exact experience the product is designed to create. In contrary, users may have varied experience or unpleasant experiences on a product that has been designed without the consideration of expressiveness. Inspired by how musicians study music rhetoric in order to master composing and performing expressive music, this paper discusses computer rhetoric as a design approach for developing expressive computer. Computer rhetoric, in this paper, denotes the art of using visual, audio and functional elements effectively to achieve expressive effects of computers.
Advance classical musicians spend significant amount of time studying each musical figure appears in musical piece they play and rehearsing them in mind everyday to make sure they know how they shall sound. Indisputably, a performer needs to possess performance techniques to be physically capable to express the musical figures. However, unless the musician knows how to perform the musical figures effectively and convincingly, he/she would not be able to give a persuasive and expressive performance.
The same is applied to developing computer products. Programming skills and other technical knowledge are needed to create a workable product. However, in order to develop an expressive computer product, we need a systematic plan to find and incorporate appropriate elements into the product to create the specific expression(s).
Even though expression, like emotion, may seem very abstract, it is made up of concrete elements. For example, we can tell that a little girl is happy when she smiles and jumps excitedly. With our experience, we are able to perceive the abstract expression from the concrete, observable behaviors, which in this case refer to the girl’s body language. In Dr. B. J. Fogg’s study of persuasive technology, Dr. Fogg proposed that by identifying the three basic roles of computer, which are tool, medium and social actor, we could then classify and understand how computers use different techniques to influence people’s attitudes and behaviors. Dr. Fogg’s study is an example of using concrete techniques, such as tunneling, reduction technology, modeling and others, to achieve persuasion, which is an abstract attribute.
Dr. Fogg took the functional approach. There are definitely more ways to break down the elements. There were also studies in visual rhetoric that investigated how visual images communicate with people. This knowledge could also be well applied to developing expressive computer. The more elements we identified, the more tools we have to build our expressive computer. Thus, understand the computer rhetorical elements will be a great help to making computer expressive.
The following illustrates three steps that developers could employ to create expressive computer
Example: Digital Health Diary for People with Mild Depression
1) Identify the expression(s): Supportive
(What is the goal of this product? How do you want users to feel about your product? Do different features or different parts of the product need to have different expressions? )
2) Finding the elements
Functional: Rewards (positive reinforcement), reminders, ubiquitous
Visual: Warm Color, Anthromorphic Interface, Catchy/ encouraging text
(What elements do you want to use? What elements best express your need? Is it technically feasible?)
3) Looking at the big picture – balancing and finding connections
Integrate the visual elements and positive reinforcement:Designing characters with friendly look – Character that smiles and speak in a friendly, supportive manner.
(What are the relationships between the different elements? How do you connect and integrate them?)
The conclusion is that the expressiveness of a product do not just manifest by itself. A step-by-step plan is needed to create the expressiveness. Future research should focus on identifying expressive elements and assessing the effectiveness of this methodology.
Reference:
Fogg, B. J. Persuasive Technology: Using Computers to Change What We Think and Do, San Francisco: Morgan Kaufmann, 2002.