This research builds upon prior validation studies of the Community of Inquiry (CoI) survey by utilizing multiple ratings measures to validate the survey’s tripartite structure (teaching presence, social presence, & cognitive presence). In prior studies exploring the construct validity of these 3 subscales, only respondents’ course ratings were utilized. This study asked participants to additio...

the aim of this study was to examine whether formal and informal social activities are associated with a lower risk of depression. besides, we investigated which type of social activities may protect against late-life depression by gender using data from a population-based study of older korean adults.data for analysis were drawn from the 2010 korean longitudinal study of aging. study sample in...

The advent of online social networks created new prediction opportunities for recommender systems: instead of relying on past rating history through the use of collaborative filtering (CF), they can leverage the social relations among users as a predictor of user tastes similarity. Alas, little effort has been put into understanding when and why (e.g., for which users and what items) the social...

In this paper, we focus on recommending an item set to multiple users. Group recommender systems are designed to deal with the issue of recommending items for a user group. However, in some scenarios where different items are packed together as a gift set, such as gift set promotion, album promotion, we need to focus on consumers’ preferences to multiple items rather than to some specific item....

This study reports on the development and validation of an abridged version of the 50-item Autism-Spectrum Quotient (AQ), a self-report measure of autistic traits. We aimed to reduce the number of items whilst retaining high validity and a meaningful factor structure. The item reduction procedure was performed on data from 1,263 Dutch students and general population adults. The resulting 28-ite...