Misleading Effects Research Articles

The potential of front-of-pack labels on unhealthy foods to counteract the misleading effects of health claims

The potential of front-of-pack labels on unhealthy foods to counteract the misleading effects of health claims

When Gist and Familiarity Collide: Evidence From False Recognition in Younger and Older Adults

Aging is associated with decreased recollection required to offset misleading effects of familiarity, as well as an increased mnemonic reliance on gist-based over detail-based information. We tested the novel hypothesis that age-related decrements in overriding familiarity can be eliminated under conditions in which gist-based information facilitates retrieval. Twenty-seven younger adults and 27 older adults viewed scenes from two categories in an incidental encoding phase. In a recognition phase, old scenes were intermixed with new scenes from the studied categories and an unstudied category, with each new scene reappearing after 4, 18, or 48 intervening scenes. Participants were to respond "yes" to old scenes, and "no" to new scenes, including their repetitions. Despite encoding the scenes similarly, older adults made more false endorsements of new and repeated new scenes from studied categories. Both groups, however, were equally unlikely to falsely recognize new and repeated new scenes from the unstudied category. When helpful gist and misleading familiarity collide, gist wins, and eliminates age-related increases in false recognition.

Untangling tectonic slip from the potentially misleading effects of landform geometry

We present a new three-dimensional (3D) approach to the analysis of fault scarps using high-resolution elevation models. Advances in topographic measurement techniques [e.g., lidar (light detection and ranging) and photogrammetric techniques] have allowed extensive measurement of single earthquake and cumulative scarps to draw conclusions about along-strike slip variation and fault slip history. The resulting slip distributions are almost always variable and noisy, but the cause is often unclear. We first present the results of sensitivity analysis to demonstrate significant apparent noise due to varying terrain and fault and measurement geometry (topographic slope attitude, fault dip and slip obliquity). We show, with a case study on the Hoshab fault, Pakistan, that oblique slip can have a significant effect on the measured apparent slip. Individual planar geomorphic markers only constrain one component of the full 3D slip vector. We use the variation in apparent offset with marker geom­etry to constrain the slip vector in 3D. Combining multiple offset measurements along strike, we show that determining the slip vector is reduced to a simple linear formulation. We test our method using a terrestrial lidar data set from the ruptures on the Borrego fault from the 2010 El Mayor–Cucapah earthquake (Baja California, Mexico). Combining 22 observations, we estimate a throw of 1.56 ± 0.02 m and a lateral slip of 1.9 ± 0.3 m. The vertical slip estimate agrees well with previous studies, but the lateral slip is significantly smaller. In regions of steep varied topography or with oblique slip, our method will give enhanced slip resolution while standard methods will give biased estimates.

Linear Discriminative Star Coordinates for Exploring Class and Cluster Separation of High Dimensional Data

AbstractOne main task for domain experts in analysing their nD data is to detect and interpret class/cluster separations and outliers. In fact, an important question is, which features/dimensions separate classes best or allow a cluster‐based data classification. Common approaches rely on projections from nD to 2D, which comes with some challenges, such as: The space of projection contains an infinite number of items. How to find the right one? The projection approaches suffers from distortions and misleading effects. How to rely to the projected class/cluster separation? The projections involve the complete set of dimensions/features. How to identify irrelevant dimensions? Thus, to address these challenges, we introduce a visual analytics concept for the feature selection based on linear discriminative star coordinates (DSC), which generate optimal cluster separating views in a linear sense for both labeled and unlabeled data. This way the user is able to explore how each dimension contributes to clustering. To support to explore relations between clusters and data dimensions, we provide a set of cluster‐aware interactions allowing to smartly iterate through subspaces of both records and features in a guided manner. We demonstrate our features selection approach for optimal cluster/class separation analysis with a couple of experiments on real‐life benchmark high‐dimensional data sets.

The misleading effect of serum galactomannan testing in high-risk haematology patients receiving prophylaxis with micafungin

ObjectivesTo investigate the performance of the routine serum galactomannan (sGM) assay in the diagnosis of invasive aspergillosis (IA) in high-risk haematology patients receiving prophylaxis with micafungin. MethodsRetrospective study including all haematological patients who received prophylaxis with micafungin during high-risk IA episodes (neutropenic patients after chemotherapy for acute myeloid leukaemia/myelodysplastic syndrome; allogeneic haematopoietic stem-cell transplantation during early neutropenic phase or graft-versus-host disease requiring high prednisone doses) and for whom at least one sGM result was available. Episodes were classified as follows: true-positive (positive GM in the context of IA), false-positive (positive GM result in patients who had no evidence of IA), true-negative (negative GM test results and no IA), or false-negative (negative GM test in the context of IA). Non-evaluable patients were excluded. ResultsAmong 146 evaluable episodes, four were true-positive in the context of probable breakthrough IA (incidence of breakthrough IA, 2.7%); 111/146 high-risk episodes (76%) were considered true-negative and 31/146 (21.2%) were considered false-positive. No false-negative episodes were detected. All but one of the false-positive episodes were detected in surveillance GM tests, leading to high-resolution CT scans in eight cases (8/31; 25.8%), all of which were negative. The positive predictive and negative predictive values of sGM for surveillance and diagnostic approaches were 3.2% (1/31) and 100% (110/110) and 75% (3/4) and 100% (1/1), respectively. ConclusionsSurveillance of asymptomatic patients receiving prophylaxis with micafungin using sGM is unnecessary, because the results are either negative or false-positive. However, sGM remains useful in the diagnosis of breakthrough IA in symptomatic patients during prophylaxis.

Magnitude and direction of missing confounders had different consequences on treatment effect estimation in propensity score analysis

ObjectivePropensity score (PS) analysis allows an unbiased estimate of treatment effects but assumes that all confounders are measured. We assessed the impact of omitting confounders from a PS analysis on clinical decision making. Study Design and SettingWe conducted Monte Carlo simulations on hypothetical observational studies based on virtual populations and on the population from a large randomized trial (CRASH-2). In both series of simulations, PS analysis was conducted with all confounders and with omitted confounders, which were defined to have different strengths of association with the outcome and treatment exposure. After inverse probability of treatment weighting, we calculated the absolute risk differences and numbers needed to treat (NNT). ResultsIn both series of simulations, omitting a confounder that was moderately associated with the outcome and exposure led to negligible bias on the NNT scale. The bias induced by omitting strongly positive confounding variables remained less than 15 patients to treat. Major bias and reversed effects were found only when omitting highly prevalent, strongly negative confounders that were similarly associated with the outcome and exposure with odds ratios greater than 4.00 (or <0.25). This omission was accompanied by a substantial decrease in analysis power. ConclusionThe omission of strongly negative confounding variables from a PS analysis can lead to incorrect clinical decision making. However, omitting these variables also decreases the analysis power, which may prevent the reporting of significant but misleading effects.

Assessing information on food packages

PurposeThe purpose of this paper is to present an experimental study which aims at assessing the potentially misleading effect of graphic elements on food packaging. The authors call these elements potentially misleading elements (PMEs) as they can give customers false expectations. They are either highlighted numerical information (30 per cent fibre, 8 per cent fat, 100 per cent natural […]) or pictorial information with no relation to the product (e.g. images of happy people).Design/methodology/approachIn a combined decision task monitored by eye-tracking and a subsequence survey, the authors tested the impact of PMEs on common products. Combining different pairs of products, where one product had a PME, whereas the other did not, the authors could evaluate if preference correlated with the presence of a PME.FindingsThe authors found both types of PMEs to have analogous effects on participants’ preferences and correlate with participants’ visual attention. The authors also found evidence for a positive influence on a later explicit justification for the specific choice.Research limitations/implicationsThis study was conducted in a lab environment and solely related to health-related decisions. The authors still need to know if these findings are transferable to real in-store decisions and other needs such as high quality or low price. This calls for further research.Practical implicationsThe topic is important for food companies, and it might become a priority in managing brand equity, combining consumer preferences, loyalty and communicative fairness.Originality/valueUsing eye-tracking and retrospective interviews brings new insights to consumer’s decision-making and how misleading potentially occurs.

The role of density-dependence regulation in the misleading effect of the Aznalcollar mining spill on the booted eagle fecundity.

The aim of this study was to assess the exposure and potential effects of the toxic elements released by the Aznalcollar spillage on the fecundity of the booted eagle (Hieraetus pennatus) population of Doñana National Park. We measured As, Cd, Cu, Pb, Zn, Sb and Tl levels in the blood of 24 individuals after the accident and also used data of reproductive performance of the species from 1976 to 2000. While As, Sb and Tl were below their detection limits and only 3 samples were above detection limit for Cd (0.02-0.04μg/dl), mean levels of Cu, Zn and Pb (μg/dl) were found to be 38.736, 532.937 and 0.719, respectively, in fledglings; and 66.112, 652.571 and 1.825, respectively, in adults. These levels were higher in adults, but they did not differ significantly between age classes and were at safe levels. In addition, a positive relationship between relative fecundity and the combination of Cu, Zn and Pb was observed. Following the mining spill, the mean population fecundity was lower (0.536 fledglings per pair in the population) than before (1.093). However, the decrease in fecundity over time was also related to the increase of breeding pairs, suggesting a density-dependent regulation and nullifying the mining spillage effect. Thus, although raptors have proved to be highly valuable biomonitors of environmental pollution, we must be especially cautious and go beyond the apparent effects that sometimes we quickly believe to detect, leading us to reach mistaken conclusions that could affect our management plans.

Asymmetric effects of fiscal policy in EU and OECD countries

In this article, we take account of an evaluation of the short- and medium-term effects of the transmission mechanism of fiscal policy in EU and OECD countries and their dependence on the state of the economy and fiscal behaviour. Our findings indicate that (i) across EU member states the impact of government spending on economic performance is larger in the accession than in core member states, (ii) since the onset of the economic/financial crisis the government spending multipliers have become larger in both core and accession EU member states, and (iii) a comparison with fiscal responses in the OECD countries shows robustness of our estimates. The conclusion implies that the austerity measures present a substantial drag for economic activity in accession EU countries. Thus, we may state that not considering the fiscal behaviour and state of the economy gives misleading fiscal multiplier effects, which in turn lead to the adoption of inappropriate fiscal measures that even worsen a country's economic situation.

Misleading Norms and Vulnerability in the Life Course: Definition and Illustrations

This review paper investigates the potentially misleading effect of some social norms on life trajectories. Conformity to some gender norms related to the division of paid and family work becomes counterproductive for individuals who experience turning points in their life along the way. We present various empirical results mainly drawn from the Swiss National Centre of Competence in Research LIVES where conformity to social norms has detrimental effects on life trajectories. We conclude by stressing that the sensitizing concept of misleading norms contributes to a better understanding of vulnerability across the life course.

Macronutrients compliance between foods labels and marketing package content values

Background: Nutrient labeling raises consumers' awareness of nutritional values of foods. However, uncertainties with regard to amluracy of nutrition facts' labels have recently increased. Objective: The objective of this study is to determine the compliance between information presented in food labeling of widely consumed foods and their true values. Materials and Methods: This study investigated 24 types of foods including dairy, meat, and protein rich foods, snacks, dressings and tomato paste, and pasta. In total, 1764 experiments were conducted. The levels of fat, carbohydrate, and protein were measured using Folch method, Fehling's solution, and Kjeldahl device, respectively. The data were then analyzed using Spearman correlation coefficient and Wilcoxon test. Results: The amount of fat, carbohydrate, and protein content in 67.8%, 48.4%, and 38.5% of analyzed foods was different from their nutrition fact labels. The fat content on nutrition facts label of dressings was lower than their analyzed values (10.15 ± 15.87 vs. 11.40 ± 21.44 g, P = 0.001). In total, the fat content on food labels was significantly different from analyzed values (15.54 ± 13.02 vs. 12.60 ± 10.77 g, P = 0.001). The carbohydrate content on food labels of meat and protein foods was less than their analyzed values (5.49 ± 3.24 vs. 6.88 ± 4.47 g, P = 0.001). Conclusion: The study showed a significant difference between laboratory analyzed values and food labels nutrition facts which may have misleading effects on foods choice of customers. In general, lack of amluracy in labeling nutritional value of foods and providing inamlurate information might lead to public unhealthy eating.

Emergent knowledge of a universal phonological principle in the L2 acquisition of vowel harmony in Turkish: A ‘four’-fold poverty of the stimulus in L2 acquisition

A significant body of theoretically motivated research has addressed the role of Universal Grammar (UG) in the nonnative acquisition of morphosyntax and properties of the syntax–semantics interface, but very little research has addressed the role of phonological principles of UG in nonnative language acquisition. Turkish has a regular and pervasive system of vowel harmony for which classroom second language (L2) learners receive explicit instruction and abundant input; however, there are also cases of non-canonical vowel harmony in Turkish, for which classroom learners receive no instruction and rather little input. In this study, we show that English–Turkish L2ers come to exhibit sensitivity to the ‘No Crossing Constraint’ of UG (Goldsmith, 1976; Hammond, 1988) when calculating non-canonical vowel harmony in the context of underlyingly pre-specified non-velarized laterals (i.e. ‘light’ [l]), despite the poverty of the stimulus and potentially misleading effects of classroom instruction and standard Turkish orthography. We argue that this supports the view that nonnative phonological development is guided by (at least one principle of) UG.

Intragenome Diversity of Gene Families Encoding Toxin-like Proteins in Venomous Animals.

The evolution of venoms is the story of how toxins arise and of the processes that generate and maintain their diversity. For animal venoms these processes include recruitment for expression in the venom gland, neofunctionalization, paralogous expansions, and functional divergence. The systematic study of these processes requires the reliable identification of the venom components involved in antagonistic interactions. High-throughput sequencing has the potential of uncovering the entire set of toxins in a given organism, yet the existence of non-venom toxin paralogs and the misleading effects of partial census of the molecular diversity of toxins make necessary to collect complementary evidence to distinguish true toxins from their non-venom paralogs. Here, we analyzed the whole genomes of two scorpions, one spider and one snake, aiming at the identification of the full repertoires of genes encoding toxin-like proteins. We classified the entire set of protein-coding genes into paralogous groups and monotypic genes, identified genes encoding toxin-like proteins based on known toxin families, and quantified their expression in both venom-glands and pooled tissues. Our results confirm that genes encoding toxin-like proteins are part of multigene families, and that these families arise by recruitment events from non-toxin genes followed by limited expansions of the toxin-like protein coding genes. We also show that failing to account for sequence similarity with non-toxin proteins has a considerable misleading effect that can be greatly reduced by comparative transcriptomics. Our study overall contributes to the understanding of the evolutionary dynamics of proteins involved in antagonistic interactions.

On the effect of measurement errors in simultaneous monitoring of mean vector and covariance matrix of multivariate processes

In this paper, we investigate the misleading effect of measurement errors on simultaneous monitoring of the multivariate process mean and variability. For this purpose, we incorporate the measurement errors into a hybrid method based on the generalized likelihood ratio (GLR) and exponentially weighted moving average (EWMA) control charts. After that, we propose four remedial methods to decrease the effects of measurement errors on the performance of the monitoring procedure. The performance of the monitoring procedure as well as the proposed remedial methods is investigated through extensive simulation studies and a real data example.

Understanding the risk of scaling and fouling in hollow fiber forward osmosis membrane application

Abstract Fouling studies of forward osmosis (FO) were mostly conducted based on fouling evaluation principals applied to pressure membrane processes such as reverse osmosis (RO)/nanofiltration (NF)/microfiltration (MF)/ultrafiltration (UF). For RO/NF/MF/UF processes, the single flux driving force (hydraulic pressure) remains constant, thus the fouling effect is easily evaluated by comparing flux data with the baseline. Whilst, the scenario of fouling effects for FO process is entirely different from RO/NF/MF/UF processes. Continuously changing driving force (osmotic pressure difference), the changes in concentration polarization associated with the varying draw solution/feed solution concentration and the fouling layer effects collectively influence the FO flux. Thus, usual comparison of the FO flux outcome with the baseline results cannot exactly indicate the real affect of membrane fouling, rather presents a misleading cumulative effect. This study compares the existing FO fouling technique with an alternate fouling evaluation approach using two FO set-ups. Scaling and fouling risk for hollow fiber FO was separately investigated using synthetic water samples and model organic foulants as alginate, humic acid and bovine serum albumin. Results indicated that FO flux declines up to 5% and 49% in active layer-feed solution and active layer-draw solution orientations respectively.

Monetary Policy Statements, Treasury Yields, and Private Yields: Before and after the Zero Lower Bound

Monetary policy actions since 2008 have influenced long-term interest rates through forward guidance and quantitative easing - both strategies. We examine whether the effect of such actions on Treasury yields have passed through to private yields to a degree comparable to experience before 2008. In order to perform this examination, we propose a strategy to identify the comovement between Treasury yields and private yields induced by monetary policy when an observable representing policy changes, such as changes in the interbank rate, is not available, or when other systematic factors may be important. Our strategy implies that least squares regressions, even within an event window, can be misleading, and our empirical results find evidence for such misleading effects. Implementation of our instrumental variables strategy suggests that the movements in Treasury yields induced by monetary policy statements have passed through to private yields, but to a smaller degree than typical prior to the end of 2008. This may suggest that the effectiveness of unconventional policy actions in stimulating activity are attenuated relative to conventional policy actions.

Monetary policy statements, treasury yields, and private yields: Before and after the zero lower bound

Monetary policy actions since 2008 have influenced long-term interest rates through forward guidance and quantitative easing. We examine whether the effect of such actions on Treasury yields have passed through to private yields to a degree comparable to experience before 2008. We illustrate the possibility of misleading inference from least squares regressions, and our empirical results find evidence for such misleading effects. Implementation of our instrumental variables strategy suggests that the movements in Treasury yields induced by monetary policy statements have passed through to private yields, but to a smaller degree than typical prior to the end of 2008.

Assessing the Role of Shape and Label in the Misleading Packaging of Food Imitating Products: From Empirical Evidence to Policy Recommendation.

Food imitating products are chemical consumer items used frequently in the household for cleaning and personal hygiene (e.g., bleach, soap, and shampoo), which resemble food products. Their containers replicate elements of food package design such as possessing a shape close in style to drinking product containers or bearing labels that depict colorful fruits. In marketing, these incongruent forms are designed to increase the appeal of functional products, leading to chemical consumer product embellishment. However, due to the resulting visual ambiguity, food imitating products may expose consumers to the risk of being poisoned from ingestion. Thus, from a public health perspective, food imitating products are considered dangerous chemical products that should not be sold, and may merit being recalled for the safety of consumers. To help policymakers address the hazardous presence of food imitating products, the purpose of this article is to identify the specific design features that generate most ambiguity for the consumer, and therefore increase the likelihood of confusion with foodstuffs. Among the visual elements of food packaging, the two most important features (shape and label) are manipulated in a series of three lab studies combining six Implicit Association Tests (IATs) and two explicit measures on products' drinkability and safety. IATs were administered to assess consumers' implicit association of liquid products with tastiness in a within-subject design in which the participants (N = 122) were presented with two kinds of food imitating products with a drink shape or drink label compared with drinks (experiential products with congruent form) and classic chemical products (hygiene products) (functional products with congruent form). Results show that chemical consumer products with incongruent drink shapes (but not drink labels) as an element of food package design are both implicitly associated with tastiness and explicitly judged as safe and drinkable. These results require confirmation in other studies involving different shapes and labels. Notwithstanding, due to the misleading effect of this ambiguity, public health authorities are thus well advised to focus their market surveillance on chemical products emulating a food or drink shape.

Blinded by Beauty: Attractiveness Bias and Accurate Perceptions of Academic Performance.

Despite the old adage not to ‘judge a book by its cover’, facial cues often guide first impressions and these first impressions guide our decisions. Literature suggests there are valid facial cues that assist us in assessing someone’s health or intelligence, but such cues are overshadowed by an ‘attractiveness halo’ whereby desirable attributions are preferentially ascribed to attractive people. The impact of the attractiveness halo effect on perceptions of academic performance in the classroom is concerning as this has shown to influence students’ future performance. We investigated the limiting effects of the attractiveness halo on perceptions of actual academic performance in faces of 100 university students. Given the ambiguity and various perspectives on the definition of intelligence and the growing consensus on the importance of conscientiousness over intelligence in predicting actual academic performance, we also investigated whether perceived conscientiousness was a more accurate predictor of academic performance than perceived intelligence. Perceived conscientiousness was found to be a better predictor of actual academic performance when compared to perceived intelligence and perceived academic performance, and accuracy was improved when controlling for the influence of attractiveness on judgments. These findings emphasize the misleading effect of attractiveness on the accuracy of first impressions of competence, which can have serious consequences in areas such as education and hiring. The findings also have implications for future research investigating impression accuracy based on facial stimuli.

Blanking circuits: Culprit or Savior?

Blanking circuits: Culprit or Savior?