Modeling context through domain ontologies

Traditional information retrieval systems aim at satisfying most users for most of their searches, leaving aside the context in which the search takes place. We propose to model two main aspects of context: The themes of the user's information need and the specific data the user is looking for to achieve the task that has motivated his search. Both aspects are modeled by means of ontologies. Documents are semantically indexed according to the context representation and the user accesses information by browsing the ontologies. The model has been applied to a case study that has shown the added value of such a semantic representation of context.

Updating Latent Class Imputations with External Auxiliary Variables

Latent class models are often used to assign values to categorical variables that cannot be measured directly. This “imputed” latent variable is then used in further analyses with auxiliary variables. The relationship between the imputed latent variable and auxiliary variables can only be correctly estimated if these auxiliary variables are included in the latent class model. Otherwise, point estimates will be biased. We develop a method that correctly estimates the relationship between an imputed latent variable and external auxiliary variables, by updating the latent variable imputations to be conditional on the external auxiliary variables using a combination of multiple imputation of latent classes and the so-called three-step approach. In contrast with existing “one-step” and “three-step” approaches, our method allows the resulting imputations to be analyzed using the familiar methods favored by substantive researchers.     

The information needs of occupational therapy students: a case study

This article summarises a case study on the information needs of Masters level Occupational Therapy 5 (OT) students at one English university. A mixed methods questionnaire was used to explore motivators for information‐seeking, preferred information resources and barriers inhibiting the satisfaction of information needs. Thirteen recommendations for practice were formulated, focusing on how information professionals can best facilitate OT students’ learning and evidence‐based research skills in preparation for clinical practice. The study was completed by Jane Morgan‐Daniel, who received a Distinction for her work from Aberystwyth University, where she graduated with an MSC in Information and Library Studies in December 2016. She has written this article together with her dissertation supervisor, Hugh Preston. A. M.     

Development of perfectionism in junior athletes: Examination of actual and perceived parental perfectionism

ABSTRACT

Initial research suggests that parental perfectionism is central to the development of athlete perfectionism. However, it is unclear whether perceived or actual parental perfectionism is most important. The present study aimed to address this issue in two ways. First, we re-examined the predictive ability of actual versus perceived parental perfectionism on athlete perfectionism. Second, for the first time, we tested whether perceived parental perfectionism mediated the relationship between actual parental perfectionism and athlete perfectionism. A sample of 150 junior athletes and their parents completed measures of perfectionism (perfectionistic strivings and perfectionistic concerns). Junior athletes completed two measures, one of their own perfectionism and one of perceptions of their parents’ perfectionism. Parents completed one measure of their own perfectionism. Regression analyses showed that perceived parental perfectionism predicted athlete perfectionism over and above actual parental perfectionism. Mediation analyses provided support for our proposed model. Overall, the findings suggest that both actual and perceived parental perfectionism are important in the development of perfectionism in junior athletes.     

Long-term effects of a token economy on target and off-task behaviors

The present study examined the effects of a token economy on off-task (nontarget) behavior occurring concurrently with the reinforcement of target behavior. The ability of a token economy to maintain its effectiveness for a long time period when utilized in a class for emotionally disturbed and learning disabled children was also investigated. Results indicated that while the token economy maintained its effectiveness in terms of increasing the frequency of target behaviors, the frequency of offtask or inappropriate behaviors also increased as the year progressed. Implications for using token economies with a special population are discussed.     

The Influence of Computer-Mediated Communication Apprehension on Motives for Facebook Use

The purpose of this study is to examine the influence of computer-mediated communication apprehension on motives for using the interactive features on Facebook. An online survey was completed by 417 undergraduate students. Guided by uses and gratifications theory, communication apprehension in a computer-mediated context was found to be inversely related to interpersonal, self-expression, entertainment, and passing time motives for using Facebook. This study also investigated how Facebook motives predict the use of its interactive features. Interpersonal communication, self-expression, and entertainment motives all significantly predicted use of interactive features on Facebook.     

Evolution of methods to measure student information use

Over the past decade, there has been an increase in the application of the case study method to investigate the process used by students in secondary school and undergraduate academic settings to locate and use information through the library. The case study method has, in most recent years compared to investigations of 20 to 30 years ago, become established as the primary research technique used to document student thought processes in topic focus and in source selection. Direct observation and interviewing successful library users, two tools common to the case study method, may also lead to examination of student selection and critical use of evidence for research projects as students move beyond the traditional library collection. These tools have also proven to be useful as researchers in recent studies are more interested in an analysis of student use of information as evidence rather than conducting studies which only document student location and citation of resources. Selected studies which illustrate this evolution are drawn from the dissertations and field studies related to secondary school and undergraduate bibliographic instruction.     

Response to a multi-media system

Several physics classes followed an integrated multi-media, multi-modal teaching-learning system or schedule, and completed a number of evaluation instruments designed to collect data on both affective and cognitive variables, as well as on the resulting behaviors of teachers and students. The data lead to some tentative conclusions about reactions of students to different media in such a system, effects of media on learning, and the impact of the system on teacher self-concept. Conclusions relate to the future of such integrated systems and their effects on motivation and learning.