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https://www.readbyqxmd.com/read/28726177/the-reliability-paradox-why-robust-cognitive-tasks-do-not-produce-reliable-individual-differences
#1
Craig Hedge, Georgina Powell, Petroc Sumner
Individual differences in cognitive paradigms are increasingly employed to relate cognition to brain structure, chemistry, and function. However, such efforts are often unfruitful, even with the most well established tasks. Here we offer an explanation for failures in the application of robust cognitive paradigms to the study of individual differences. Experimental effects become well established - and thus those tasks become popular - when between-subject variability is low. However, low between-subject variability causes low reliability for individual differences, destroying replicable correlations with other factors and potentially undermining published conclusions drawn from correlational relationships...
July 19, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28719651/link-prediction-on-twitter
#2
Sanda Martinčić-Ipšić, Edvin Močibob, Matjaž Perc
With over 300 million active users, Twitter is among the largest online news and social networking services in existence today. Open access to information on Twitter makes it a valuable source of data for research on social interactions, sentiment analysis, content diffusion, link prediction, and the dynamics behind human collective behaviour in general. Here we use Twitter data to construct co-occurrence language networks based on hashtags and based on all the words in tweets, and we use these networks to study link prediction by means of different methods and evaluation metrics...
2017: PloS One
https://www.readbyqxmd.com/read/28718087/speaking-two-languages-in-america-a-semantic-space-analysis-of-how-presidential-candidates-and-their-supporters-represent-abstract-political-concepts-differently
#3
Ping Li, Benjamin Schloss, D Jake Follmer
In this article we report a computational semantic analysis of the presidential candidates' speeches in the two major political parties in the USA. In Study One, we modeled the political semantic spaces as a function of party, candidate, and time of election, and findings revealed patterns of differences in the semantic representation of key political concepts and the changing landscapes in which the presidential candidates align or misalign with their parties in terms of the representation and organization of politically central concepts...
July 17, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28698318/words-do-matter-a-systematic-review-on-how-different-terminology-for-the-same-condition-influences-management-preferences
#4
Brooke Nickel, Alexandra Barratt, Tessa Copp, Ray Moynihan, Kirsten McCaffery
OBJECTIVES: Changing terminology for low-risk, screen-detected conditions has now been recommended by several expert groups in order to prevent overdiagnosis and reduce the associated harms of overtreatment. However, the effect of terminology on patients' preferences for management is not well understood. This review aims to synthesise existing studies on terminology and its impact on management decision making. DESIGN: Systematic review. METHODS: Studies were included that compared two or more terminologies to describe the same condition and measured the effect on treatment or management preferences and/or choices...
July 10, 2017: BMJ Open
https://www.readbyqxmd.com/read/28681313/an-independent-survival-prognostic-role-for-human-epidermal-growth-factor-receptor-2-in-gastric-cancer-evidence-from-a-meta-analysis
#5
Y Wang, L He, Y Cheng
BACKGROUND: Some studies have suggested that human epidermal growth factor receptor 2 (HER2) positive is associated with poor outcomes in gastric cancer (GC), whereas another inconsistent studies make the situation confused. This meta-analysis was performed to determine whether HER2 played an independent prognostic role in clinicopathological characteristics and survival outcomes of GC. PATIENTS AND METHODS: Combination of GC and human epidermal growth factor 2 or HER2 or HER2/neu or erbB-2 or cerbB-2 or c-erbB2 or CD340 or p185 were used as key words...
July 5, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28678079/cantonese-tone-perception-for-children-who-use-a-hearing-aid-and-a-cochlear-implant-in-opposite-ears
#6
Mansze Mok, Colleen M Holt, Kathy Y S Lee, Richard C Dowell, Adam P Vogel
OBJECTIVES: The ability to recognize tones is vital for speech perception in tonal languages. Cantonese has six tones, which are differentiated almost exclusively by pitch cues (tones 1 to 6). The differences in pitch contours among the tones are subtle, making Cantonese a challenging language for cochlear implant users. The addition of a hearing aid has been shown to improve speech perception in nontonal languages and in Mandarin Chinese. This study (1) investigates the Cantonese tone perception ability of children who use a cochlear implant and a hearing aid in opposite ears; (2) evaluates the effect of varying pitch height and pitch contour cues on Cantonese tone perception for these children; and (3) compares the Cantonese tone perception ability for using a hearing aid and a cochlear implant together versus an implant alone...
July 1, 2017: Academic Medicine: Journal of the Association of American Medical Colleges
https://www.readbyqxmd.com/read/28676773/intuitive-face-judgments-rely-on-holistic-eye-movement-pattern
#7
Laura F Mega, Kirsten G Volz
Non-verbal signals such as facial expressions are of paramount importance for social encounters. Their perception predominantly occurs without conscious awareness and is effortlessly integrated into social interactions. In other words, face perception is intuitive. Contrary to classical intuition tasks, this work investigates intuitive processes in the realm of every-day type social judgments. Two differently instructed groups of participants judged the authenticity of emotional facial expressions, while their eye movements were recorded: an 'intuitive group,' instructed to rely on their "gut feeling" for the authenticity judgments, and a 'deliberative group,' instructed to make their judgments after careful analysis of the face...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28651360/novel-reproductive-technologies-to-prevent-mitochondrial-disease
#8
Lyndsey Craven, Mao-Xing Tang, Gráinne S Gorman, Petra De Sutter, Björn Heindryckx
BACKGROUND: The use of nuclear transfer (NT) has been proposed as a novel reproductive treatment to overcome the transmission of maternally-inherited mitochondrial DNA (mtDNA) mutations. Pathogenic mutations in mtDNA can cause a wide-spectrum of life-limiting disorders, collectively known as mtDNA disease, for which there are currently few effective treatments and no known cures. The many unique features of mtDNA make genetic counselling challenging for women harbouring pathogenic mtDNA mutations but reproductive options that involve medical intervention are available that will minimize the risk of mtDNA disease in their offspring...
June 23, 2017: Human Reproduction Update
https://www.readbyqxmd.com/read/28650352/the-effect-of-aging-and-priming-on-same-different-judgments-between-text-and-partially-masked-speech
#9
Richard L Freyman, Jenna Terpening, Angela C Costanzi, Karen S Helfer
OBJECTIVES: It is well known from previous research that when listeners are told what they are about to hear before a degraded or partially masked auditory signal is presented, the speech signal "pops out" of the background and becomes considerably more intelligible. The goal of this research was to explore whether this priming effect is as strong in older adults as in younger adults. DESIGN: Fifty-six adults-28 older and 28 younger-listened to "nonsense" sentences spoken by a female talker in the presence of a 2-talker speech masker (also female) or a fluctuating speech-like noise masker at 5 signal-to-noise ratios...
June 22, 2017: Ear and Hearing
https://www.readbyqxmd.com/read/28649979/hot-pressed-polymer-nanofiber-supported-graphene-membrane-for-high-performance-nanofiltration
#10
Zhao Wang, Rajesh Sahadevan, Che-Ning Yeh, Todd J Menkhaus, Jiaxing Huang, Hao Fong
Graphene oxide (GO) sheets can be readily surface-overlaid on hot-pressed electrospun polyacrylonitrile (PAN) nanofiber membrane to form a continuous and crack-free layer; upon thermal reduction at 150 oC for 12 h, the resulting reduced GO (rGO) layer can reject ~90% MgSO4 with high water flux (due to the size exclusion mechanism), making the prepared PAN-rGO membranes promising nanofiltration media for water purification. It is important to note that no delamination of GO/rGO sheet layers has been observed throughout this study...
June 26, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28648571/the-neuro-cognitive-representations-of-symbols-the-case-of-concrete-words
#11
Valentina Borghesani, Manuela Piazza
We live our lives surrounded by symbols (e.g., road signs, logos, but especially words and numbers), and throughout our life we use them to evoke, communicate and reflect upon ideas and things that are not currently present to our senses. Symbols are represented in our brains at different levels of complexity: at the first and most simple level, as physical entities, in the corresponding primary and secondary sensory cortices. The crucial property of symbols, however, is that, despite the simplicity of their surface forms, they have the power of evoking higher order multifaceted representations that are implemented in distributed neural networks spanning a large portion of the cortex...
June 22, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28647493/associations-between-the-dbh-gene-plasma-dopamine-%C3%AE-hydroxylase-activity-and-cognitive-measures-in-han-chinese-patients-with-schizophrenia
#12
Zuoli Sun, Yun Ma, Wenbiao Li, Jing He, Jun Li, Xue Yang, Peixian Mao, Joseph F Cubells, Yilang Tang
The dopamine (DA) and norepinephrine (NE) systems modulate cognitive function. Dopamine β-hydroxylase (DβH) converts DA to NE, and its activity is under strong genetic control. This study examines the association of plasma DβH (pDβH) activity, DBH gene polymorphisms (-1021C>T, rs1611115 and 444G>A, rs1108580) and cognitive deficits in Han Chinese patients with schizophrenia. We assessed pDβH activity and cognitive function using the Verbal Fluency Test (VFT), Trail Making Test (TMT) A-B, Stroop color-word test and Wisconsin Card Sorting Test (WCST) in 200 patients with schizophrenia before and after 8weeks of antipsychotic treatment (96 patients completed assessments at baseline and post-treatment)...
June 21, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28638561/importance-and-methodologies-of-endodontic-microleakage-studies-a-systematic-review
#13
REVIEW
Farnaz Jafari, Sanaz Jafari
INTRODUCTION: It is very important to obtain a tight seal in obturated root canal, making it necessary to conduct clinical or laboratory studies on the sealability of endodontic materials. Different methodologies have been historically used to assess microleakage of different endodontic materials. The aim of the present study was to comprehensively review different material testing methods used in microleakage studies, their interpretation and importance in endodontic literature. MATERIAL AND METHODS: A systematic search was conducted in Medline, Cochrane, and Web of Science databases...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28638551/effectiveness-of-flossing-loops-in-the-control-of-the-gingival-health
#14
Francisco Azcarate-Velázquez, Roberto Garrido-Serrano, Gabriel Castillo-Dalí, María-Angeles Serrera-Figallo, Alfonso Gañán-Calvo, Daniel Torres-Lagares
BACKGROUND: One of the key factor in the good condition of periodontal tissues is their daily hygiene. Oral hygiene techniques such brushing and a good interdental hygiene by correct flossing are very important. The aim of this study is to compare the use of dental floss in a loop vs traditional floss in the control of Loe-Silness Gingival Index (IG), Turesky´s Plaque Index (IPT), Gingival Bleeding Index (IS) and the values of interleukin 6 (IL-6) and interleukin 8 (IL-8). MATERIAL AND METHODS: A comparative study of 40 patients in which each patient was his own control, using during 45 days each one of the devices (new loop floss and conventional floss) of interdental hygiene analysed...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28638329/the-contribution-of-cognitive-factors-to-individual-differences-in-understanding-noise-vocoded-speech-in-young-and-older-adults
#15
Stephanie Rosemann, Carsten Gießing, Jale Özyurt, Rebecca Carroll, Sebastian Puschmann, Christiane M Thiel
Noise-vocoded speech is commonly used to simulate the sensation after cochlear implantation as it consists of spectrally degraded speech. High individual variability exists in learning to understand both noise-vocoded speech and speech perceived through a cochlear implant (CI). This variability is partly ascribed to differing cognitive abilities like working memory, verbal skills or attention. Although clinically highly relevant, up to now, no consensus has been achieved about which cognitive factors exactly predict the intelligibility of speech in noise-vocoded situations in healthy subjects or in patients after cochlear implantation...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28614458/capacity-for-self-monitoring-reading-comprehension-in-elementary-school
#16
Gabriela Juliane Bueno, Carolina Alves Ferreira Carvalho, Clara Regina Brandão de Ávila
Purpose: To investigate the capacity for self-monitoring reading comprehension in Brazilian Elementary School students. Methods: Fifty-three Elementary students in the 5th and 9th grades from two Public Schools in the city of São Paulo were assessed. They were selected based on their oral reading rate and grouped according to their performance in reading comprehension in the following categories: Group with best comprehension: students with adequate rate and accuracy, without difficulties in reading comprehension; Group with worst comprehension: students with adequate rate and accuracy but with difficulties in reading comprehension...
June 8, 2017: CoDAS
https://www.readbyqxmd.com/read/28590148/the-phonological-memory-profile-of-preschool-children-who-make-atypical-speech-sound-errors
#17
Rebecca Waring, Patricia Eadie, Susan Rickard Liow, Barbara Dodd
Previous research indicates that children with speech sound disorders (SSD) have underlying phonological memory deficits. The SSD population, however, is diverse. While children who make consistent atypical speech errors (phonological disorder/PhDis) are known to have executive function deficits in rule abstraction and cognitive flexibility, little is known about their memory profile. Sixteen monolingual preschool children with atypical speech errors (PhDis) were matched individually to age-and-gender peers with typically developing speech (TDS)...
June 7, 2017: Clinical Linguistics & Phonetics
https://www.readbyqxmd.com/read/28585265/past-present-and-future-of-epigenetics-in-brain-sexual-differentiation
#18
REVIEW
Nancy G Forger
Sexual differentiation has long been considered "epigenetic," although the meaning of that word has shifted over time. Here we track the evolution of ideas about epigenetics in sexual differentiation, and identify principles that have emerged from recent studies. Experiments manipulating a particular epigenetic mechanism during neonatal life demonstrate a role for both histone acetylation and DNA methylation in the development of sex differences in the brain and behavior of rodents. In addition, hormone-dependent sex differences in the number of neurons of a particular phenotype may be programmed by differences in DNA methylation early in life...
June 6, 2017: Journal of Neuroendocrinology
https://www.readbyqxmd.com/read/28550657/scoring-best-worst-data-in-unbalanced-many-item-designs-with-applications-to-crowdsourcing-semantic-judgments
#19
Geoff Hollis
Best-worst scaling is a judgment format in which participants are presented with a set of items and have to choose the superior and inferior items in the set. Best-worst scaling generates a large quantity of information per judgment because each judgment allows for inferences about the rank value of all unjudged items. This property of best-worst scaling makes it a promising judgment format for research in psychology and natural language processing concerned with estimating the semantic properties of tens of thousands of words...
May 27, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28536551/dissociating-effects-of-scrambling-and-topicalization-within-the-left-frontal-and-temporal-language-areas-an-fmri-study-in-kaqchikel-maya
#20
Shinri Ohta, Masatoshi Koizumi, Kuniyoshi L Sakai
Some natural languages grammatically allow different types of changing word orders, such as object scrambling and topicalization. Scrambling and topicalization are more related to syntax and semantics/phonology, respectively. Here we hypothesized that scrambling should activate the left frontal regions, while topicalization would affect the bilateral temporal regions. To examine such distinct effects in our functional magnetic resonance imaging study, we targeted the Kaqchikel Maya language, a Mayan language spoken in Guatemala...
2017: Frontiers in Psychology
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