Describe the difference between Within-Subjects evaluation and Between-Subjects evaluation?

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Human Computer Interaction

Human Computer Interaction

Describe the difference between Within-Subjects evaluation and Between-Subjects evaluation?
2. Describe the difference between Response time and User think time?
3.Describe the meaning of Institutional Review Boards (IRB)?
4. Describe the meaning of “Active user paradox” introduced by John M. Carroll and Mary Beth Rosson?
5. Describe the meaning of “Context-sensitive help

Sample answers

 Human Computer Interaction





  1. Within-Subjects evaluation vs Between-Subjects evaluation

In most empirical evaluations on interaction or input devices rely on comparative techniques. One such design is the within the subjects where each participant is evaluated or tested by relying on specific conditions all around the subjects. Under between the subjects, tests rely on only one specific condition for one group while the groups are tested using other conditions.

  1. Response time vs. User think time

User think time refers to the time it takes for the user to make a decision to handle the next task. Under thinking time the systems is usually idle awaiting the user to decide the commands they would like it to resolve. The response time refers to the time it takes for the server to resolve the task or for the server to give the results of the query.

  1. Meaning of Institutional Review Boards (IRB)?

Institutional review boards are committee created to analyze and approve any research that will involve the human subjects while conducting tests to ensure these researches will be carried out in reference to the existing federal rules, institutional standards, and ethical parameters.

  1. Meaning of “Active user paradox” by John M. Carroll and Mary Beth Rosson

The paradox of active user notes that user never read the manual and this takes them a longer time to learn how to use the systems or the software, as they have not familiarized themselves with all the concepts of the manual. The study thus noted that instead of designing products for the rational users who will read the manuals, the systems should be designed bearing in mind the readers will not read them.

  1. Describe the meaning of “Context-sensitive help?

It is a form of help, which is visible at specific points in the software, and it provides documentation for the specific features that one intend on using.


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