Visualization schemes for domain novices exploring a topic space: the navigation classification scheme

In this article and two other articles which conceptualize a future stage of the research program (Leide, Cole, Large, & Beheshti, submitted for publication; Cole, Leide, Large, Beheshti, & Brooks, in preparation), we map-out a domain novice user’s encounter with an IR system from beginning to end so that appropriate classification-based visualization schemes can be inserted into the encounter process. This article describes the visualization of a navigation classification scheme only. The navigation classification scheme uses the metaphor of a ship and ship’s navigator traveling through charted (but unknown to the user) waters, guided by a series of lighthouses. The lighthouses contain mediation interfaces linking the user to the information store through agents created for each. The user’s agent is the cognitive model the user has of the information space, which the system encourages to evolve via interaction with the system’s agent. The system’s agent is an evolving classification scheme created by professional indexers to represent the structure of the information store. We propose a more systematic, multidimensional approach to creating evolving classification/indexing schemes, based on where the user is and what she is trying to do at that moment during the search session.     

The use of domain-specific concepts in biomedical text summarization

Text summarization is a method for data reduction. The use of text summarization enables users to reduce the amount of text that must be read while still assimilating the core information. The data reduction offered by text summarization is particularly useful in the biomedical domain, where physicians must continuously find clinical trial study information to incorporate into their patient treatment efforts. Such efforts are often hampered by the high-volume of publications. This paper presents two independent methods (BioChain and FreqDist) for identifying salient sentences in biomedical texts using concepts derived from domain-specific resources. Our semantic-based method (BioChain) is effective at identifying thematic sentences, while our frequency-distribution method (FreqDist) removes information redundancy. The two methods are then combined to form a hybrid method (ChainFreq). An evaluation of each method is performed using the ROUGE system to compare system-generated summaries against a set of manually-generated summaries. The BioChain and FreqDist methods outperform some common summarization systems, while the ChainFreq method improves upon the base approaches. Our work shows that the best performance is achieved when the two methods are combined. The paper also presents a brief physician’s evaluation of three randomly-selected papers from an evaluation corpus to show that the author’s abstract does not always reflect the entire contents of the full-text.     

Simulations with Elaborated Worked Example Modeling: Beneficial Effects on Schema Acquisition

Worked examples have been effective in enhancing learning outcomes, especially with novice learners. Most of this research has been conducted in laboratory settings. This study examined the impact of embedding elaborated worked example modeling in a computer simulation practice activity on learning achievement among 39 undergraduate students within a classroom environment. The students from one introductory forensic science course were randomly assigned to one of two groups that worked through computer-based simulations containing worked example modeling conditions presented in varied order. The computer software administered the modeled simulations, prior knowledge test, pretest, posttests, and a second domain test. Findings from this study suggest that embedded worked example modeling within practice simulations can be an effective method for transfer of learning with novice learners. This article describes the dissertation study completed by Debra K. Meier under the guidance of David W. Brooks at the University of Nebraska, Lincoln.     

Are Anatomy PhDs Nearing Extinction or Adapting to Change? United States Graduate Education Trends in the Anatomical Sciences

Faculty qualified to teach in the anatomical sciences are growing scarce just as the need for trained anatomists is greater than ever. Enrollments are surging in anticipation of a large physician shortfall; meanwhile, many anatomists are reaching retirement age. Who will fill the teaching gap? This study assessed trends in doctorates awarded in Anatomy and related fields within the United States (US) since 1969 and evaluated modern graduate education in the anatomical sciences. Data were compiled from the National Science Foundation Survey of Earned Doctorates. The total number of doctorates in the anatomical sciences and number of doctorates by sex and race/ethnicity were plotted for trend analysis. The number of PhD anatomy training programs within US medical schools was also assessed. Curricula and major characteristics of all active programs were evaluated through website searches and program director interviews. While doctorates in cell biology, developmental biology, and neuroscience have grown, the number of PhDs awarded in Anatomy has declined, on average, by 3.1 graduates per year to a 50-year low of only 8 graduates in 2017. Currently, 21 active doctoral programs in anatomy operate within US medical schools and fall into three general categories: anatomy education (n = 8), classic anatomy (n = 8), and anthropology/evolutionary anatomy (n = 5). Without a concerted effort by stakeholders to address the shortage, anatomists may face extinction. Expansion of the anatomy education doctoral degree may represent a necessary evolution of the field to meet job market needs and to thwart the extinction threat.     

The ‘copper flowers’ of Central Africa and their significance for prospecting and archaeology

This article reviews the role of three copper-indicating plants in prospecting for minerals in Central Africa. New original data are presented for the Zaïrean ‘copper flower’ (Haumaniastrum katangense) which has escaped from its original habitat on cupriferous outcrops of the Central African Copperbelt and has been observed on sites of precolonial copper smelters. Excavation of these sites has revealed numerous ceramics and copper crosses, and other items of much archaeological interest. It is evident that phytoarchaeology may be valuable in a much wider context.     

An extinction cue reduces spontaneous recovery of a conditioned taste aversion

The effect of an auditory cue presented during extinction on spontaneous recovery of a conditioned taste aversion was investigated in three experiments. Experiment 1 demonstrated that the presence of the cue during extinction did not influence saccharin consumption during that phase, and that an aversion to saccharin in the absence of the cue was stronger at 18 days than at 1 day after extinction, representing spontaneous recovery rather than a renewal effect. Experiment 2 showed that a cue presented during extinction and testing reduced spontaneous recovery. Experiment 3 replicated that effect and showed that it depended on the cue’s correlation with extinction and not on an unconditioned effect; cues that had been presented during or prior to conditioning did not reduce spontaneous recovery when presented during testing. The cue’s potential to reduce spontaneous recovery through conditioned inhibition or configural cue learning is discussed, as is the possibility that the cue retrieves a saccharin extinction memory in a manner consistent with Bouton’s (1993) account of spontaneous recovery.     

Perceptions of the sport psychologist by female university athletes.

In this study we explored the existence of a favourable attitude towards sport psychologists by female athletes in relation to other sport-oriented and mental health professionals. Ninety female student athletes made judgements of similarity between 11 practitioner terms using the triad method. A rank-order task was also completed, where the 11 professionals were ranked on three expertise variables in sporting, mental and physical issues. The results were analysed using (1) the metric scaling procedure of correspondence analysis, (2) cultural consensus analysis and (3) PROperty FITting analysis. A two-dimensional solution provided the best interpretation of the similarity judgements. The correspondence analysis configuration positioned the sport psychologist centrally between a sport-oriented pair and the cluster of mental health professionals. Participants reported adequate consensus on all three expertise variables, which is consistent with the assumptions of Cultural Consensus Theory. Consistent with earlier research, the three variables were salient in the participants' similarity judgements of sport and mental health professionals. Our results suggest the existence of a more favourable perception of the sport psychologist and a distancing from a direct association with mental health practitioners. However, the centrality of the term may indicate a more cloudy distinction as to where the sport psychologist exists in relation to other professionals.     

The Gates-MacGinitie Readiness Skills Test and Illinois Test of Psycholinguistic Abilities as predictors of first-grade reading

Compares the effectiveness of the Gates-MacGinitie Readiness Skills Test (G-M) and Illinois Test of Psycholinguistic Abilities (ITPA) for predicting reading achievement in grade one and studies whether either test differentially predicts reading in an i. t. a. approach Gr a t. o. sight approach. Subjects in grade one were administered the G-M, a measure of intelligence, and the ITPA at the beginning of the school year and the Lee-Clark Reading Tests at the end of the year. Subjects were learning to read in two approaches to reading –i. t. a. and t. o. sight-oriented approach. Relationships between the G-M. IQ, ITPA, and reading were analyzed using Pearson-Product Moment Correlations, Partial Correlations with intelligence controlled, and Stepwise Regression Analyses. The G-M was found to be a better predictor of reading than the ITPA for both i. t. a. and t. o. groups. The relative importance of specific subtests was found to depend on the factors of reading groups and/or sex. Future research may find a combination of available reading readiness tests to be most predictive of reading.