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» Improving Student Question Classification
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98
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IFIP12
2008
14 years 11 months ago
A Study with Class Imbalance and Random Sampling for a Decision Tree Learning System
Sampling methods are a direct approach to tackle the problem of class imbalance. These methods sample a data set in order to alter the class distributions. Usually these methods ar...
Ronaldo C. Prati, Gustavo E. A. P. A. Batista, Mar...
CHI
2006
ACM
15 years 10 months ago
Embedded phenomena: supporting science learning with classroom-sized distributed simulations
`Embedded phenomena' is a learning technology framework in which simulated scientific phenomena are mapped onto the physical space of classrooms. Students monitor and control...
Tom Moher
62
Voted
CHI
2010
ACM
15 years 4 months ago
Are your participants gaming the system?: screening mechanical turk workers
In this paper we discuss a screening process used in conjunction with a survey administered via Amazon.com’s Mechanical Turk. We sought an easily implementable method to disqual...
Julie S. Downs, Mandy B. Holbrook, Steve Sheng, Lo...
CHI
2009
ACM
15 years 10 months ago
The moral accountability of a personified agent: young adults' conceptions
This paper describes the preliminary results of a study conducted to answer the question: Do users attribute moral accountability to personified agent technologies? A pilot study ...
Nathan G. Freier, Elia J. Nelson, Amanda Rotondo, ...
OZCHI
2006
ACM
15 years 3 months ago
Question-based group authentication
There are various situations where a distinction needs to be made between group members and outsiders. For example, to protect students in chat groups from unpleasant incidents ca...
Ann Nosseir, Richard C. H. Connor, Karen Renaud