With large student enrollment, MOOC instructors face the unique challenge in deciding when to intervene in forum discussions with their limited bandwidth. We study this problem of instructor intervention. Using a large sample of forum data culled from 61 courses, we design a binary classifier to predict whether an instructor should intervene in a discussion thread or not. By incorporating novel...

A typical discussion thread in an online forum spans multiple pages involving participation from multiple users and thus, may contain multiple view-points and solutions. A user interested in the topic of discussion or having a problem similar to being discussed in the thread may not want to read all the previous posts but only a few selected posts that provide her a concise summary of the ongoi...

Purpose – The purpose of this paper is to explain some phenomena observed in the acquisition of motor skills: the loss of conscious access to knowledge of the structure of a skill and the awareness that an error has been made prior to the receipt of knowledge of results. Although there are rich descriptive accounts of skill acquisition in the literature, there are no satisfactory explanatory mo...

Recent advance in digital storage technology has enabled us to archive a large volume of video data. Thanks to this trend, we have archived more than 1,800 hours of video data from a daily Japanese news show in the last ten years. When considering the effective use of such a large news video archive, we assumed that analysis of its chronological and semantic structure becomes important. We also...

a Michael M. Danchak, Rensselaer Polytechnic Institute, [email protected] b Kimberly Kenyon, State University of New York at Albany, [email protected] Abstract -Threaded discussion has the potential to be a very effective tool for learning online. However, it does not naturally fit well into engineering and science courses because of the factual nature of these domains. Our experience with thi...

Conversation is central to human interaction. The usual way to conduct asynchronous “conversations” over the Internet is to post e-mail messages on an electronic bulletin board, with messages organized by topic. However, such environments do not allow us to exploit the richness of conversation theory for effective collaboration. This presentation will review key elements of conversation theory ...

abstractthis study investigated the effect of digital games on vocabulary acquisition of low-proficiency iranian male and female efl learners. in order to select homogeneous learners in terms of their english language proficiency, the standard nelson proficiency test was administered, and based on the obtained results, 60 low-proficiency efl learners were selected (31 females and 29 males). the...

this study investigates the effect of different types of subtitle on incidental vocabulary learning among iranian efl learners. to this end, 60 high school students in behbahan were selected after taking a proficiency test. the test was administered to ensure participants' homogeneity. participants were randomly assigned to three experimental groups, namely, bimodal group (a), standard gro...

this study was an attempt to investigate whether teaching critical reading strategies had any significant effect on intermediate efl learners’ vocabulary retention. to fulfill the purpose of this study, 72 male and female students within the age range of 17 to 32 years studying at farzan and farzanegan language schools in tehran at intermediate level were selected from a total number of 114 par...

objectives: the spontaneous language sample analysis is an important part of the language assessment protocol. language samples give us useful information about how children use language in the natural situations of daily life. the purpose of this study was to compare conversation, freeplay, and narrative speech in aspects of mean length of utterance (mlu), type-token ratio (ttr), and the numbe...