There are a number of websites that provide overviews of theories in and for HCI. Our aim here is to add to this stock of online knowledge by providing a set of critiques of alternative theories in HCI written by graduate students taking Professor Yvonne Rogers' L642 class in "Issues and Concepts in HCI" at the Indiana University-Bloomington School of Library and Information Science during the Fall 2003 semester. These include:

• Activity Theory (Sam Rajkumar)
• Activity Theory (Tyler Waite)
• Distributed Cognition (Steven Harris)
• Mental Models "Revisited" (Andrew Kurtz)
• Ambiguity Framework (Michelle Dalmau)
• Situated Action (Michelle Cooper)

The structure for each report consists of the following sections.

• Summary
• Motivation
• History and Background
• Explanation
• Case Study
• Pros and Cons
• Links
• Comments
• References

• TIP - Major theories in Psychology
• COTCOS - Overviews of a number of theories in HCI by European researchers (2000)
• CHARM - Overview of various methods and theories in HCI