Monday, May 4, 2009

Fitt's Law
Commented on:
Josh Meyers
Cole Jones
Jared Wright

Paul M. Fitt's law is has been remarkably true for many different applications. The law, which models human movement, predicts the time it takes to reach a position. The target time to reach a target location is calculated by the following equation(formulated differently than presented in paper):


T: average time of movement
a: start/stop time of device
b: inherent speed of device
D: Distance from starting point to target
W: width of target

Overall, the law states that the time it takes to reach a target area is proportionate to the distance of width of the target. So, it would take the same amount of time, given the correct ratio, to reach a destination, if the target was a wide, but the distance of was long, or the target was narrow and the distance was short. This law has been proven to hold true to many things, and I think is pretty fascinating.

Harmful Things Considered....

Commented on:
Kevin Kwan
Jared Wright
Brad Twitty
Nicholas Harris
J. Chris Elgin
Brian Salato
Devin Mckaskle
John Zachary
Patrick Clay

1. Ethnography
In the paper "Ethnography is considered Harmful", various reasons are brought up against the usage of Ethnography. While the positives of ethnography and its importance was discussed in class, this paper discusses the change in its usage nowadays and its negative effects. I thought the paper presented some decent opinions on how ethnographies are used today. The author introduces some of the new methods of ethnography and presents arguments that it does not adequately perform the work it was originally intended. For example, the method that studies the place where people work does not "...reveal the 'lived work'." The authors also talk about the affect that new ethnography has on designs. The concerns they raised seem legit in their own view, such as understanding a different aspect of the world that influences design. (i.e. social and cultural aspects) Overall, it seems that they regard the new methods as not covering enough or missing some critical points that are related to design. in that case, I feel that it would be appropriate to add certain traits to the methods to improve their coverage area. By including the areas of concern, ethnography would no longer be harmful for design, as they would also include a broader area.

2.Usability Evaluation
One of the most important factors of design we've studied this semester was usability evaluation. we've read our shares of books that emphasize on its importance as well as people who has taken advantage of it and succeeded. however, in this paper, arguments are presented against it and how its "harmful". While they do not deny the value of usability studies, the authors suggest that not all development situations should be subjected under such an evaluation. Personally, I think usability evaluation is a great method for designers and engineers to gauge their product and its effectiveness. Still, the potential misses that the paper said are possible is worth thinking about. The paper contemplated on the missed opportunities that the usability studies could cause for some products when they are tested prematurely. It can't be denied that usability evaluations are useful, but perhaps it'd be best if they aren't taken in the same context as they are now. They should still perform them, but also evaluate the results a little more carefully and considered the possibilities and not let everything be dictated by the outcomes.

3.Human-Centered Designs
Don Norman! And i thought I was done with him after the last book, but alas, the class has brought us together again. In this paper, Don Norman talks about the dominance of human-centered designs, and its harmful effects on design overall. Norman offers an alternative, Activity-Centered design, and reasons why. After reading through this paper, I must say that his suggest method have some merits to them. He presents some examples such as writing tools and music instruments and how their designed for their specific activity and people were able to adapt to them and still perform great feats. While that may be true for certain things, I think that the rule is not universal. For some activities, people are willing to make the effort to adapt for whatever satisfaction or reward they gain. In some activities that are trivial, users would not be motivated to adapt for it.Norman argues that while HCD has its benefits, it also some some heavy weighing drawbacks. One of which is that a certain group of users might tend to make changes that benefit them only and not really involve other people. Overall, I thought it was an interesting read, but once again, I would evaluate its usage on a case by case basis. While its true that HCD does indeed have some things it needs to address, it is not necessarily deficient for certain objects while ACD also has its advantages for some things.