Is there a real diagnostic impact of elastosonography and contrast-enhanced ultrasonography in the management of thyroid nodules?

Ultrasonography(US) and the new applications US elastography(USE) and contrast-enhanced US(CEUS) are used in the screening of thyroid nodules,for which fine-needle aspiration biopsy(FNAB) is the best single diagnostic test.The aim of the study was to compare the sensitivity,specificity,positive predictive value(PPV),and accuracy of the four examinations in nodules with cytological and histological diagnoses.The study used data from US,FNAB,USE(elasticity(ELX 2/1) index),and CEUS(Peak index and time to peak(TTP) index) evaluated in 73 thyroid nodules in 63 consecutive patients likely to undergo surgery.Cytological-histological correlation was available for 38 nodules.No correlation emerged between nodule size and cytological results.A significant(P=0.03) positive correlation between cumulative US findings and cytological results was found.In addition,significant correlations between cumulative US findings and cytology(P=0.02) and between cumulative US findings and histology(P<0.0001) were found.US showed the best specificity and PPV,and FNAB the best sensitivity.There was no significant difference in the ELX 2/1 index,Peak index,or TTP index among nodules subdivided according to cytological scores.No significant correlation was found between ELX 2/1 index,Peak index,and TTP index,on the one hand,and nodule size,US cumulative findings,cytology,and histology on the other hand.The sensitivity of the ELX 2/1 index was high,but its specificity was very low.The accuracy and PPV of USE were lower than those of the other procedures.Only the correlation between Peak index and cumulative US findings reached a value close to significance.Our ultimate aim is to minimise unnecessary thyroidectomy.US and FNAB continue to play a central diagnostic role.The use of a US score showed high specificity and PPV.The specificity of FNAB was low in this selected series because of the numbers of indeterminate cytological responses.USE and CEUS are innovative techniques that need to be standardized.The ELX 2/1 index,Peak index,and TTP index seem to be unrelated to histology.The best statistical data on USE and CEUS concerned their sensitivity and PPV,respectively.At present,USE and CEUS are too time-consuming and of limited utility in selecting patients for surgery.     

Book reviews

Lee, Irving J. and Lee, Laura L., Handling Barriers in Communication. Harper and Brothers, 49 East 33 Street, New York 16, New York. 1957, $5. Paper.

Auer, J. Jeffery, An Introduction to Research in Speech. Harper and Brothers, 49 East 33 Street, New York 16, New York. 1959, $5.

Brown, Charles T., Introduction to Speech. Houghton Mifflin Company, 432 Park Avenue South, New York 16, New York. 1955.

Uris, Dorothy, Everybody's Book of Better Speaking. David McKay Company, Inc., 119 West 40 Street, New York 18, New York. 1960, $4.95.

Braden, Waldo W., Speech Methods and Resources: A Textbook for the Teacher of Speech. Harper and Brothers, 49 East 33 Street, New York 16, New York. 1961, $6.50.

Marra, Waldo J., How to Streamline Your Letters. National Retail Credit Association, 375 Jackson Avenue, St. Louis 30, Missouri. Multilithed, paper.

Windes, Russell R. and Kruger, Arthur N., Championship Debating. J. Weston Walch, Box 1075, Portland, Maine. 1961 ; paper cover, $3.50 ; plastic cover, $4.50.     

Exceeding expectations: scaffolding agentic engagement through assessment as learning

Background: The active involvement of learners as critical, reflective and capable agents in the learning process is a core aim in contemporary education policy in Australia, and is regarded as a significant factor for academic success. However, within the relevant literature, the issue of positioning students as agents in the learning process has not been fully examined and needs further exploration.

Purpose: This study aims to explore ways in which aspects of self-regulated learning theory may be integrated with the concept of agentic engagement into classroom practice. Specifically, the study seeks to scaffold students’ self-assessment capabilities and self-efficacy by using a formative assessment-as-learning process. The research examines how scaffolded planning, as part of the forethought phase in the Assessment as Learning (AaL) process, influences self-regulation and student agency in the learning process.

Sample: 126 students from school years two, four and six (student age groups 7, 9 and 11 years), and 7 teachers at an independent (co-educational, non-religious) primary school in the Northern Territory, Australia, participated in the study.

Design and methods: Conducted as a one-setting, cross-sectional practitioner research study, the data sources included students’ planning templates, writing samples, interviews with students and teachers and email correspondence with teachers. The data were analysed for emerging themes and interpreted from a framework of social cognitive theory.

Findings: In this study, students were given the opportunity and support to exercise agentic engagement. Findings suggested that, in particular, students who were identified by their teachers as low-achieving and/or with poor motivation, were perceived by the teachers as exceededing expectations by demonstrating relatively greater motivation, persistence, effort and pride in their work than would be the case usually.

Conclusions: The findings from this formative AaL study suggest that AaL has the potential to help scaffold primary students’ development of assessment capabilities.     

(<Emphasis Type="Italic">CF</Emphasis>)<Superscript>2</Superscript> architecture: contextual collaborative filtering

Recommender systems have dramatically changed the way we consume content. Internet applications rely on these systems to help users navigate among the ever-increasing number of choices available. However, most current systems ignore the fact that user preferences can change according to context, resulting in recommendations that do not fit user interests. This research addresses these issues by proposing the \(({ CF})^2\) architecture, which uses local learning techniques to embed contextual awareness into collaborative filtering models. The proposed architecture is demonstrated on two large-scale case studies involving over 130 million and over 7 million unique samples, respectively. Results show that contextual models trained with a small fraction of the data provided similar accuracy to collaborative filtering models trained with the complete dataset. Moreover, the impact of taking into account context in real-world datasets has been demonstrated by higher accuracy of context-based models in comparison to random selection models.     

Drawing a computer scientist: stereotypical representations or lack of awareness?

ABSTRACT

Stereotypes people hold about computer scientists contribute to underrepresentation in computer science. Perceptions of computer scientists have historically been linked to males and a “nerd” culture, which can lead to lack of interest, particularly for girls. This article presents two studies conducted with two groups of middle schoolers: those who attended our programming camp (Study One) and those who did not (Study Two). After analyzing participants’ drawings and two survey questions we found that perceptions youth holds about computer scientists may be improving. Additionally, we found that males (versus females) and those youth who did not attend our camp (versus those who did) tended to have more stereotypical perceptions of computer scientists. With this article, we contribute to the literature on CS stereotypes by examining both positive and negative representations youth had about computer scientists. We also cast light on the lack of awareness about this profession among the youth of this age.     

Cross-cultural Study of Understanding of Scale and Measurement: Does the everyday use of US customary units disadvantage US students?

Quantitative and qualitative studies of various aspects of the perception of biotechnology were conducted among 469 Slovenian high school students of average age 17 years. Our research aimed to explore relationships among students' pre-knowledge of molecular and human genetics, and their attitudes to four specific biotechnological applications. These applications—Bt corn, genetically modified (GM) salmon, somatic and germ line gene therapy (GT)—were investigated from the viewpoints of usefulness, moral acceptance and risk perception. In addition, patterns and quality of moral reasoning related to the biotechnological applications from the aspect of moral acceptability were examined. Clear gender differences were found regarding the relationship between our students' pre-knowledge of genetics and their attitudes to biotechnological applications. While females with a better genetics background expressed a higher risk perception in the case of GM salmon, their similarly well-educated male colleagues emphasized the risk associated with the use of germ line GT. With all four biotechnological applications, patterns of both rationalistic—deontological and teleological—and intuitive moral reasoning were identified. Students with poorer genetics pre-knowledge applied an intuitive pattern of moral reasoning more frequently than their peers with better pre-knowledge. A pattern of emotive reasoning was detected only in the case of GM salmon. A relatively low quality of students' moral reasoning, as demonstrated by their brief and small number of supporting justifications (explanations), show that there is a strong need for practising skills of argumentation about socio-scientific issues in Slovenian high schools on a much larger scale. The implications for future research and classroom applications are discussed.     

The theatre student series receives rave reviews

Interfacing communication and propaganda

Jacques Ellul, Propaganda, New York, Alfred A. Knopf, Inc., 1966

Joe McGinniss, The Selling of the President 1968, New York, Trident Press, 1969

George A. Miller, The Psychology of Communication, Seven Essays, New York, Basic Books, Inc., 1967

Alfred G. Smith, Communication and Culture, New York, Holt, Rinehart and Winston, Inc., 1966

Raymond G. Smith, Speech Communication: Theory and Models, New York, Harper and Row, Inc., 1970.     

LGBTQ-inclusive curricula: why supportive curricula matter

There is growing attention to lesbian, gay, bisexual, transgender, queer and questioning (LGBTQ) issues in schools, including efforts to address such issues through the curriculum. This study examines whether students’ perceptions of personal safety and school climate safety are stronger when curricula that include LGBTQ people are present and supportive. LGBTQ and straight middle and high school students from California (1232 students from 154 schools) participated in the 2008 Preventing School Harassment survey. They reported their experience of LGBTQ-inclusive curriculum, its level of supportiveness and perceptions of safety. Multilevel methods allowed for an examination of differences between individuals in the same school while controlling for differences between schools. LGBTQ-inclusive curricula were associated with higher reports of safety at the individual and school levels, and lower levels of bullying at the school level. The amount of support also mattered: supportive curricula were related to feeling safer and awareness of bullying at the individual and school levels. The implications of school- versus student-level results for educational policy and practices are discussed.     

Gains From Training in Phonological Awareness in Kindergarten Predict Reading Comprehension in Grade 9

The effects of a kindergarten training program in phonological awareness with 209 Swedish-speaking children were followed up until the end of Grade 9. Initial levels of letter knowledge and phonological awareness were positively associated with the level of decoding skill in Grade 3 but not with its growth afterward. The intervention group performed significantly better in decoding in Grade 3, and the difference was maintained until Grade 6. The trained children also scored higher in Grade 9 reading comprehension. Although the results give empirical support for a connection between early phonological awareness training, later word decoding development, and still later reading comprehension, the theoretical explanation for the link between especially word decoding and reading comprehension is far from clear.     

Slovenian young researchers’ motivation for knowledge transfer

A programme for the promotion of science and doctoral studies called the Young Researchers Training Programme has been developed in Slovenia. Since it began, the programme has been substantially funded and over 6,000 young people have participated in it. However, no evaluation of the programme’s effectiveness has yet been conducted. In this study we identified young researchers’ motivation for entering the programme, their assessment of the training and links to knowledge transfer into practice as the principal idea behind the programme. Two training groups, university based young researchers and company based young researchers, are compared in order to assess whether the type of training affects knowledge transfer. The analyses show that young researchers in the economy are more involved in direct knowledge transfer and their motivation to do so is mainly intrinsic. On the other hand, university based young researchers need extrinsic incentives to cooperate in projects in economic sector, for their motivation is more oriented towards academic research. Implications for Slovenia, as well as for other countries’ higher education policies, are discussed.