The ‘I knew it all along’ phenomenon: second-order false belief understanding and the curse of knowledge in primary school children

This study investigated two different expressions of the so-called curse of knowledge in primary school children: hindsight bias and outcome bias. Further, it explored the possible predictive function of false belief understanding in reducing these biases. Ninety-one children aged 7, 9, and 11 years (middle- to upper-middle class) were administered classical first- and second-order false belief tasks as well as hindsight and outcome bias tasks in a within-subjects design, while controlling for cognitive level. Both biases were found at all ages. Second-order false belief understanding seemed to reduce outcome bias but not hindsight bias. These findings indicate that the curse of knowledge is a multifaceted construct with potential relevant implications for learning in children.     

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.     

The binding media of the polychromy of Qin Shihuang's Terracotta Army

The “Terracotta Army” is a worldwide known archaeological finding in China. It is a part of the burial complex of the emperor Qin Shihuangdi (259–210 BC), which is still under excavation and study. The fact that the sculptures, chariots and weapons of the First Chinese Emperor's Terracotta Army were originally all painted in bright colours is still not widely known. The chemical characterisation of the paint medium was performed through an analytical procedure based on GC-MS. The proteinaceous binder was identified for the first time through a desalting procedure used in proteomics. The identification of egg as a paint binder is extremely interesting in terms of the historical significance of the work of art itself and important in terms of the method of conservation. Moreover it represents one of the first steps towards an understanding of the painting technique used on ancient sculptures in China, of which – despite their fame – nothing is yet known.     

A Multisystem Psycho-Biological Approach to the Understanding of Parental Dispositions

SYNOPSIS

Does work-family conflict influence parental behaviors and parenting-related emotional states? Through an experimental research approach, River and colleagues showed that work-family conflict influences both emotions and parental behaviors, but the effect is moderated by the quality of the intimate relationship. In this commentary, we offer an interpretation of the results congruent with the recent theoretical approaches that stress the need for a multisystem psycho-biological approach to studying the factors that regulate parenting behaviors. In this perspective, we provide complementary explanations of the observed results and suggest possible future directions for research on these topics.     

Quantitative assessment of developmental levels in overarm throwing using wearable inertial sensing technology

Motor proficiency in childhood has been recently recognised as a public health determinant, having a potential impact on the physical activity level and possible sedentary behaviour of the child later in life. Among fundamental motor skills, ballistic skills assessment based on in-field quantitative observations is progressively needed in the motor development community. The aim of this study was to propose an in-field quantitative approach to identify different developmental levels in overarm throwing. Fifty-eight children aged 5–10 years performed an overarm throwing task while wearing three inertial sensors located at the wrist, trunk and pelvis level and were then categorised using a developmental sequence of overarm throwing. A set of biomechanical parameters were defined and analysed using multivariate statistics to evaluate whether they can be used as developmental indicators. Trunk and pelvis angular velocities and time durations before the ball release showed increasing/decreasing trends with increasing developmental level. Significant differences between developmental level pairs were observed for selected biomechanical parameters. The results support the suitability and feasibility of objective developmental measures in ecological learning contexts, suggesting their potential supportiveness to motor learning experiences in educational and youth sports training settings.     

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.     

Generating suggestions for queries in the long tail with an inverted index

This paper proposes an efficient and effective solution to the problem of choosing the queries to suggest to web search engine users in order to help them in rapidly satisfying their information needs. By exploiting a weak function for assessing the similarity between the current query and the knowledge base built from historical users’ sessions, we re-conduct the suggestion generation phase to the processing of a full-text query over an inverted index. The resulting query recommendation technique is very efficient and scalable, and is less affected by the data-sparsity problem than most state-of-the-art proposals. Thus, it is particularly effective in generating suggestions for rare queries occurring in the long tail of the query popularity distribution. The quality of suggestions generated is assessed by evaluating the effectiveness in forecasting the users’ behavior recorded in historical query logs, and on the basis of the results of a reproducible user study conducted on publicly-available, human-assessed data. The experimental evaluation conducted shows that our proposal remarkably outperforms two other state-of-the-art solutions, and that it can generate useful suggestions even for rare and never seen queries.     

Social Cognition,Language, and Prosocial Behaviors: A Multitrait Mixed-Methods Study in Early Childhood

Research Findings: In this study, we investigated associations among social cognition skills (specifically, emotion knowledge and theory of mind), language abilities, and 3 varieties of prosocial behavior (helping, sharing, and comforting) in early childhood. The effects of age and gender were also taken into account. Participants were 149 Italian children between 24 and 47 months of age (M = 35.6 months, SD = 6.77 months). We adopted a multitrait mixed-methods research design, using direct measures of emotion knowledge, theory of mind, and language as well as naturalistic observations of children’s free play with peers to detect the frequency with which they engaged in prosocial behaviors. Ordinal logistic regression analyses showed that helping behaviors were especially accounted for by emotion knowledge and gender, whereas variance in sharing behaviors was mostly explained by theory-of-mind ability and language. Practice or Policy: The findings encourage those involved in early childhood education to develop training and intervention programs to enhance children’s emotional, linguistic, and cognitive skills. Given that these results were obtained with children as young as 2 and 3 years, preventive intervention should be implemented during the earliest years of life.