Friday, March 27, 2015

Evaluating user experience, individual assignment 4

This weeks methods were:
1. Affect Grid
Affect grid seems to be a type of scale to measure affect. It is simple and effective but has limitations compared to more detailed methods. In this papers this method is used for measuring pleasure and arousal, However author claims that it can be used for any other feeling and emotions measurements too.

2. Cognitive Walkthrough
"The cognitive walkthrough is a precisely specified procedure for simulating a user's cognitive processes as the user interacts with an interface in an effort to accomplish a specific task". It provides user with atomic actions and then lets user to decide about sequence of necessary or required actions to fulfil the task.
This method is based on theory of exploratory learning and methods driven from this theory tries to minimise the user effort for learning the steps he needs to perform to fulfil system tasks. It seems to have a really strong theoretical background however I cant claim to understand the connection between its theory and actual steps that one must perform.
I think this method can be useful during prototyping phase, because it will help to design a system that is intuitive for the user.

3. Group-based expert walkthrough
To my understanding group-based walk through is a cognitive walk though that is done in a group. In Group-based expert walkthrough's case the user also is a domain expert. It can be used in domain specific, or work related application. This method seems better that normal cognitive walk through because being done in group, it does produce extra discussion and may give richer feedback. On the other hand it is very time consuming and finding a group of domain experts may be difficult.


I think if no limitations given, I will choose group-based expert walk though for our project, first because it is a domain specific tool, and second we can use a group discussion to improve the system function and usability.

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