scholarly journals Re-assessing the incremental predictive validity of Implicit Association Tests

2019 ◽  
Author(s):  
Jordan Axt ◽  
Nick Buttrick ◽  
Charles R. Ebersole ◽  
Jacalyn Huband
Keyword(s):  
Linear Regression ◽  
Least Squares ◽  
Predictive Validity ◽  
Linear Regression Analysis ◽  
Self Report ◽  
Equation Modeling ◽  
Measurement Reliability ◽  
Implicit Association ◽  
The Impact ◽  
Incremental Predictive Validity

Indirect measures of attitudes or stereotypes, such as the Implicit Association Test (IAT), assess associations that are relatively automatic, unintentional, or uncontrollable. A primary argument for the IAT’s use is that it can predict relevant outcomes beyond parallel direct measures, such as self-report (a claim referred to as demonstrating incremental predictive validity). Prior work on this issue relied primarily on least squares linear regression analyses, which are unable to correct for measurement (un)reliability and may then seriously inflate false positive rates in claims of incremental predictive validity. Properly accounting for the impact of measurement reliability requires using Structural Equation Modeling (SEM). In a pre-registered analysis, we investigated 10 IATs and 250 outcomes variables ( N > 14,000), and found that 69.6% of outcomes were reliably correlated with the IAT. Among outcomes that were associated with both the IAT and self-report, the IAT showed incremental predictive validity in 58.6% of cases using least squares linear regression analysis and 59.2% of cases when using SEM, with the two analytic approaches reaching the same conclusion 91.4% of the time. Though the two analysis strategies largely converged, discrepancies were large enough to suggest a non trivial percentage of conclusions drawn from least squares linear regression will be erroneous. As only SEM properly accounts for measurement reliability, it should be adopted in future analyses. To facilitate that goal, we provide tools for researchers to complete SEM analyses on tests concerning the incremental predictive validity of the IAT.

scholarly journals Invalid Claims About the Validity of Implicit Association Tests by Prisoners of the Implicit Social-Cognition Paradigm

2021 ◽  
Vol 16 (2) ◽  
pp. 435-442
Author(s):  
Ulrich Schimmack
Keyword(s):  
Social Cognition ◽  
Predictive Validity ◽  
Structural Equation ◽  
Racial Bias ◽  
Self Report ◽  
Equation Modeling ◽  
Implicit Association ◽  
Implicit Social Cognition ◽  
Association Tests ◽  
Psychometric Evidence

In a prior publication, I used structural equation modeling of multimethod data to examine the construct validity of Implicit Association Tests. The results showed no evidence that IATs measure implicit constructs (e.g., implicit self-esteem, implicit racial bias). This critique of IATs elicited several responses by implicit social-cognition researchers, who tried to defend the validity and usefulness of IATs. I carefully examine these arguments and show that they lack validity. IAT proponents consistently ignore or misrepresent facts that challenge the validity of IATs as measures of individual differences in implicit cognitions. One response suggests that IATs can be useful even if they merely measure the same constructs as self-report measures, but I find no support for the claim that IATs have practically significant incremental predictive validity. In conclusions, IATs are widely used without psychometric evidence of construct or predictive validity.

scholarly journals THU0433 TREATMENT WITH PEGLOTICASE IMPROVES HEPATIC FIBROSIS ESTIMATED BY FIBROSIS-4 INDEX IN SUBJECTS WITH CHRONIC REFRACTORY GOUT

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 454.1-454
Author(s):  
N. Schlesinger ◽  
A. Yeo ◽  
P. Lipsky
Keyword(s):  
Liver Disease ◽  
Linear Regression ◽  
Rank Order ◽  
Linear Regression Analysis ◽  
Area Under The Curve ◽  
Serum Urate ◽  
Complete Analysis ◽  
Alcoholic Fatty Liver ◽  
Significant Difference ◽  
The Impact

Background:Hyperuricemia is associated with non-alcoholic fatty liver disease (NAFLD)1,2, but the relationship to fibrosis remains uncertain3. Moreover, it is not known whether lowering serum urate will affect the course of NAFLD. The availability of data from two randomized trials of pegloticase, a pegylated recombinant mammalian uricase, that profoundly decreases serum urate afforded the opportunity to test the hypothesis that lowering urate might improve NAFLD.Objectives:To determine whether treatment of chronic refractory gout patients with pegloticase was associated with improvement in NAFLD determined by Fibrosis 4 index (Fib4).Methods:Databases from patients with chronic refractory gout who participated in two randomized 6 month clinical trials (RCTs) of pegloticase were analyzed4. Sub-sets who had persistent urate lowering to levels <1 mg/dL in response to biweekly pegloticase (Responders, n=36) were compared to those who received placebo (n=43). Since liver biopsy information was not available on these subjects, we relied on Fib4, a validated non-invasive estimate of liver fibrosis in a variety of liver diseases5,6calculated from measurements of AST, ALT, platelet count and age (Age x AST/platelets x √ALT). A Fib4 value of 1.3 is an indication that further evaluation of liver disease is warranted.Results:At baseline, the mean Fib4 values were 1.40 ± 0.86 in pegloticase responders and 1.04 ± 0.53 in subjects receiving placebo. As shown in figure 1, subjects receiving placebo exhibited a change of 0.26 ± 0.41 in the Fib4 score over the six months of the RCTs compared with 0.13 ± 0.62 in the pegloticase responders (p=0.048; by linear regression). When only the subjects with a Fib4 value > 1.3 were considered, a significant difference in the change in the Fib4 values over the 6 months of the trial between pegloticase responders and those receiving placebo was also observed (-0.15 ± 0.67 vs 0.37 ± 0.42, p=0.004, by linear regression). The correlations between serum urate area under the curve (AUC) over the 6 months of the trial and the change in Fib4 value was rs=0.33, p=0.0.0004 (Spearman rank-order correlation coefficient). Finally, multiple linear regression analysis indicated serum urate AUC (as a surrogate measure for group) is the main contributor to the change in Fib4 (p=0.018 by linear regression).Conclusion:The data are consistent with the conclusion that persistent lowering of serum urate had a significant impact on Fib4 levels, implying a possible effect on the course of NAFLD. The results support a more complete analysis involving biopsy examination of the impact of urate on liver inflammation and fibrosis.References:[1]Yang C et al. PlosOne2017; 12:e0177249[2]Jaruvongvanich V et al. Eur J Gastroenterol Hepatol 2017; 29:1031[3]Jaruvongvanich V et al. Eur J Gastroenterol Hepatol 2017; 29:694[4]Sundy JS, et al. JAMA. 2011; 306 (7):711-20[5]Sterling RK et al. Hepatol 2006; 43:1317[6]Shah AG et al. Clin Gastroenterol Hepatol 2009;7:1104Disclosure of Interests: :Naomi Schlesinger Grant/research support from: Pfizer, Amgen, Consultant of: Novartis, Horizon Therapeutics, Selecta Biosciences, Olatec, IFM Therapeutics, Mallinckrodt Pharmaceuticals, Anthony Yeo Employee of: Horizon Therapeutics, Peter Lipsky Consultant of: Horizon Therapeutics

scholarly journals The Influence of COVID-19-Induced Daily Activities on Health Parameters—A Case Study in Malaysia

2021 ◽  
Vol 13 (13) ◽  
pp. 7465
Author(s):  
Mujahid Ali ◽  
Afonso R. G. de Azevedo ◽  
Markssuel T. Marvila ◽  
Muhammad Imran Khan ◽  
Abdul Muhaimin Memon ◽  
...  
Keyword(s):  
Structural Equation ◽  
Linear Regression Analysis ◽  
Daily Activities ◽  
Social Health ◽  
Coefficient Of Determination ◽  
Equation Modeling ◽  
Risk Of Death ◽  
Unit Increase ◽  
The Impact ◽  
Health Parameters

Since December 2019, the COVID-19 epidemic has been spreading all over the world. This epidemic has brought a risk of death in the daily activity (physical and social) participation that influences travellers’ physical, social, and mental health. To analyze the impact of the COVID-19-induced daily activities on health parameters of higher education institutes, 150 students of the Universiti Teknologi PETRONAS, Perak, Malaysia, were surveyed through an online web survey using random sampling techniques. The data were analyzed through RStudio and SPSS using multilevel linear regression analysis and Hierarchical Structural Equation Modeling. The estimated results indicate that restricting individuals from doing out-of-home activities negatively influences physical and social health. A unit increase in the in-home maintenance activities during the COVID-19 pandemic introduced a daily increase of 0.5% in physical health. Moreover, a unit increase in the in-home activities at leisure time represents a 1% positive improvement in social health. Thus, physical activity has proven to be beneficial in improving physical and social health with severe COVID-19. In contrast, the coefficient of determination (R2) for all endogenous variables ranges from 0.148 to 0.227, which is incredibly acceptable in psychological research. For a healthier society with a better quality of life, this study adopted multidisciplinary approaches that are needed to be designed.

scholarly journals eWOM in C2C Platforms: Combining IAM and Customer Satisfaction to Examine the Impact on Purchase Intention

2021 ◽  
Vol 16 (5) ◽  
pp. 1612-1630
Author(s):  
Salvador Bueno ◽  
M. Dolores Gallego
Keyword(s):  
Least Squares ◽  
Partial Least Squares ◽  
Purchase Intention ◽  
Structural Equation ◽  
Source Credibility ◽  
Positive Impact ◽  
Equation Modeling ◽  
Research Model ◽  
Argument Quality ◽  
The Impact

This study is focused on communications that come from consumer-to-consumer (C2C) ecommerce relationships. This topic is directly associated with the electronic word-of-mouth (eWOM) phenomenon. eWOM is related to the set of positive or negative opinions made by potential, actual, or former customers about a seller. The present study proposes a structural equation modeling with partial least squares (PLS-SEM) research model to analyze consumers’ opinions impact on attitude toward purchasing. This model is based on the Information Adoption Model (IAM) in combination with an ecommerce satisfaction perspective, comprising five constructs: (1) service quality, (2) ecommerce satisfaction, (3) argument quality, (4) source credibility and (5) purchase intention. The model was tested by applying the Smart Partial Least Squares (SmartPLS) software for which 116 effective data from customers of the Taobao C2C platform were used. The findings reveal that all of the defined relationships were supported, confirming the positive impact of all the proposed constructs on the purchase intention. In this respect, the findings suggest that C2C platforms should strengthen the analyzed connections to grow the business and to promote transactions. Finally, implications and limitations related to the explanatory capacity and the sample are identified.

Assessing Barriers to Medication Adherence in Pediatric and Adolescent and Young Adult (AYA) Patients on Anticoagulation

Blood ◽  
2020 ◽  
Vol 136 (Supplement 1) ◽  
pp. 9-10
Author(s):  
Kevin E Todd ◽  
Meghan E Mcgrady ◽  
Anne Blackmore ◽  
Carrie Hennessey ◽  
Lori Luchtman-Jones
Keyword(s):  
Young Adults ◽  
Linear Regression ◽  
Medication Administration ◽  
Self Report ◽  
Adolescent And Young Adult ◽  
The Past ◽  
Children And Young Adults ◽  
The Impact ◽  
The Relationship ◽  
Lower Adherence

Background: Medication nonadherence rates as high as 50-75% have been widely reported in children and adolescents with chronic medical conditions. Anticoagulation nonadherence is associated with increased morbidity and mortality from hemorrhagic and thrombotic complications, reported mostly in older adult populations. As direct oral anticoagulant use increases, it is critical that pediatric clinicians understand the prevalence, adverse sequelae, and predictors of nonadherence for various anticoagulants prescribed for children and young adults to facilitate self-management in this population. To begin to address these critical knowledge gaps, this study explored the frequency of reported barriers to anticoagulation adherence and the relationship between reported barriers and adherence among a cohort of children and young adults who were prescribed anticoagulants through a pediatric thrombosis clinic. Methods: Data for this abstract were collected as part of a quality improvement (QI) initiative in the pediatric thrombosis clinic from May 2019 to November 2019. This QI initiative included the administration of a self-report measure which asked families to rate the presence/absence of 19 barriers to adherence and respond to two items assessing adherence ("How many anticoagulation doses did you/your child miss in the past 7 days?"; "Did you/your child miss any anticoagulation doses in the past month?"). Patients aged &gt; 10 years (yr.) and/or their caregivers (for patients 0-17 yr.) visiting the clinic for anticoagulation follow-up completed the measure. With IRB approval, results from 161 anonymous measures from 130 families (n = 37 caregivers; n = 62 patients; n = 31 patient/caregiver dyads) were analyzed. Descriptive statistics were used to summarize the most frequent barriers, rates of adherence, and concordance of barriers within patient/caregiver dyads. Linear regression was used to explore relationships between barriers and adherence after controlling for medication administration type (injections versus oral). To ensure only one measure per family was included in this analysis, the regression was run on the subset of measures completed by caregivers of children &lt; 18 yr. and patients ≥ 18 yr. (n = 105 [37 caregivers + 62 patients + 31 caregivers from patient/caregivers dyad = 130 families; 130 - 25 families with missing adherence data = 105 families]). Results: Of 161 reporters, 120 reported at least 1 barrier. The most common barriers were medication side effects (n = 44), alterations in lifestyle secondary to medication (n = 44) and forgetting to take the medications (n = 37). The distributions of barriers by reporter and medication type are illustrated in Figure 1. Of 31 dyads, 26 reported 1 or more barriers. Only 6 caregiver/child dyads reported the same set of barriers. The remaining 77% (n = 20) of caregivers endorsed different barriers than their children. On average, patients and caregivers reported 1.85 barriers (SD = 1.95, range 0 - 10) and that they/their child took 96% of prescribed doses (SD= 9%, range = 71 - 100%). The linear regression was significant (F(2, 102) = 4.19, p = 0.02, R2 = 0.08). After controlling for medication type (p = 0.06), a greater number of barriers was significantly associated with lower adherence (t = -2.63, p = 0.01). Every one unit increase in total barriers (1 additional barrier reported) was associated with a decrease of .26% in adherence. Discussion: Although self-reported adherence was high, 75% of patients and caregivers reported 1 or more barriers to adherence. A greater number of barriers is associated with lower adherence, regardless of medication route, suggesting that addressing reported barriers might improve adherence. The spectrum of reported barriers was diverse, differing even within patient and caregiver dyads. Therefore, it is important to evaluate both patients and caregivers to fully assess the burden of barriers. Future studies are needed to evaluate the impact of addressing barriers and the relationship between anticoagulation adherence, barriers, and health outcomes. Figure 1 Disclosures Luchtman-Jones: Corgenix: Other: Provided discounted kits for study; Accriva Diagnostics: Other: Provided kits for study.

scholarly journals EXPLORATION OF INTERCALATED KAOLINITE CLAY FOR THE UPTAKE OF BASIC DYE BY ADSORPTION − EQUILIBRIUM, KINETICS AND THERMODYNAMIC STUDIES

2021 ◽  
Vol 46 (1) ◽  
Author(s):  
C. E. Chigbundu ◽  
K. O. Adebowale
Keyword(s):  
Experimental Data ◽  
Linear Regression ◽  
Goodness Of Fit ◽  
Linear Regression Analysis ◽  
Dye Adsorption ◽  
Batch Adsorption ◽  
Sem Images ◽  
Kaolinite Clay ◽  
Non Linear ◽  
The Impact

Dyes are complex and sensitive organic chemicals which exposes microbial populations, aquatic lives and other living organisms to its toxic effects if their presence in water bodies or industrial effluents are not properly handled. This work therefore, comparatively studied the adsorption efficiencies of natural raw kaolinite (NRK) clay adsorbent and dimethyl sulphoxide (DMSO) faciley intercalated kaolinite clay (DIK) adsorbent for batch adsorption of Basis Red 2 (BR2) dye. The impact of varying the contact time, temperature and other operating variables on adsorption was also considered. The two adsorbents were characterized using SEM images, FTIR and XRD patterns. Linear and non-linear regression analysis of different isotherm and kinetic models were used to describe the appropriate fits to the experimental data. Error analysis equations were also used to measure the goodness-of-fit. Langmuir isotherm model best described the adsorption as being monolayer on homogenous surfaces while Kinetic studies showed that Elovich model provides the best fit to experimental data. The adsorption capacities of NRK and DIK adsorbents for the uptake of BR2 were 16.30 mg/g and 32.81 mg/g, respectively (linear regression) and 19.30 mg/g and 30.81 mg/g, respectively (non-linear regression). The thermodynamic parameter, ∆G showed that BR2 dye adsorption onto the adsorbents were spontaneous. DIK adsorbent was twice efficient compared with NRK for the uptake of BR2 dye.

scholarly journals ANALISIS DAMPAK KEBERADAAN TOKO SWALAYAN TERHADAP OMZET PENJUALAN KIOS–KIOS KECIL DI KOTA MATARAM

2016 ◽  
Vol 5 (3) ◽  
Author(s):  
Basri Basri
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Product Diversification ◽  
Sampling Techniques ◽  
Study Guide ◽  
Validity And Reliability ◽  
The Impact ◽  
Level 2

The objective of the study was to evaluate the impact of stores existence toward sales turnover of stalls in Mataram city. Associative research design was adopted as the study guide. Purposive sampling techniques were used in which 100 copies of the research instrument were administered to stalls owner in Mataram city, out of which 100 copies of questionnaire were filled and returned. Test of validity and reliability, classical assumption test, and multiple linear regression analysis was used to analyse the data generated from respondents. The findings revealed that stores existence variable consisted of services, product diversification, price, and comfortable of consumer have significant influence on sales turnover of stalls at 0,05 level (2-tailed). The result of the research shows the variables negatively affecting sales turnover of stalls. Furthermore, price ranks the first follow by comfortable, product diversification, and services. This research will help the owner of stalls to understand and recognize the ranking of variables affecting sales turnover of stalls in Mataram city. Keywords:   Stores Existence, Stall, and Sales Turnover.

scholarly journals STUDI EMPIRIS TENTANG PENGAWASAN KERJA, PENGALAMAN KERJA, DAN KEMAMPUAN KERJA SERTA PENGARUHNYA TERHADAP MOTIVASI BERPRESTASI KARYAWAN

2022 ◽  
Vol 18 (1) ◽  
pp. 80-100
Author(s):  
Rahayu Mardikaningsih ◽  
Samsul Arifin
Keyword(s):  
Regression Analysis ◽  
Linear Regression ◽  
Achievement Motivation ◽  
Work Experience ◽  
Sampling Method ◽  
Linear Regression Analysis ◽  
Main Function ◽  
Quantitative Studies ◽  
The Impact ◽  
Analytical Device

Human assets as one of the elements of manufacturing are the riding pressure of each organisation. They have a main function in understanding the organisation's goals. Companies ought to constantly inspire them to offer the excellent paintings effects in order that organisation sports aren't hampered consistent with their workload and responsibilities. Good paintings effects are primarily based totally at the lifestyles of a cause for fulfillment and there are numerous variables that have effect on this. This studies targets to research and decide the impact of labor supervision, paintings revel in, and paintings cappotential on fulfillment motivation. This quantitative studies takes the populace targeted on personnel who paintings withinside the manufacturing phase of a multinational organisation in Sidoarjo. Respondents on this observe have been a hundred and twenty respondents. The analytical device used, particularly SPSS model 25 program. The sampling method on this observe the usage of purposive sampling method. The analytical device used is more than one linear regression analysis. The effects confirmed that each one hypotheses have been demonstrated correct. Work supervision has a massive effective impact on fulfillment motivation. Work revel in and paintings cappotential even have a massive have effect on fulfillment motivation. The 3 of them offer a massive impact concurrently on fulfillment motivation. Keywords: job supervision, work experience, work ability, achievement motivation.

scholarly journals The Impact of Leadership, Motivation and Discipline on Employee Performance (a Study on Employees of PT Surabaya Marine)

2021 ◽  
Author(s):  
Eva Trisnawati Chumairoh ◽  
Trianggoro Wiradinata
Keyword(s):  
Regression Analysis ◽  
Data Analysis ◽  
Linear Regression ◽  
Multiple Linear Regression ◽  
Employee Performance ◽  
Linear Regression Analysis ◽  
Multiple Linear Regression Analysis ◽  
Independent Variables ◽  
Leadership Motivation ◽  
The Impact

This purpose of this study was to determine the effect of leadership, motivation and discipline on employee performance. The independent variables were leadership (X1), motivation (X1) and discipline (X3). The dependent variable was employee performance (Y). This was explanatory research with a quantitative approach. The study was conducted at PT Surabaya Marine with employees. Data analysis was carried out through multiple linear regression analysis with the F test and t test. Employee performance was strongly influenced by leadership, motivation and discipline. Keywords: leadership, motivation, discipline, employee performance

Abstract P519: Multivitamin Use And Arterial Stiffness In Older Women And Men

Circulation ◽  
2020 ◽  
Vol 141 (Suppl_1) ◽  
Author(s):  
Chisa Matsumoto ◽  
Susanne Rautiainen ◽  
Elise Roche ◽  
JoAnn E Manson ◽  
Howard D Sesso
Keyword(s):  
Linear Regression ◽  
Arterial Stiffness ◽  
Large Scale ◽  
Augmentation Index ◽  
Linear Regression Analysis ◽  
Effect Modification ◽  
Multivariate Linear Regression ◽  
Self Report ◽  
Multivariate Linear Regression Analysis ◽  
Multivitamin Use

Introduction: A multivitamin (MV) is the most commonly taken supplement in older U.S. adults. Arterial stiffness is an important intermediate marker of cardiovascular disease (CVD). However, few studies have examined the association of MV use and arterial stiffness. Hypothesis: Regular multivitamin use is associated with lower levels of arterial stiffness. Methods: A subcohort of participants enrolled in the COcoa Supplement and Multivitamin Outcomes Study (COSMOS), a large scale randomized clinical trial testing a MV and a cocoa extract supplement on CVD and cancer, completed baseline measurement of arterial stiffness assessed by pulse wave velocity (PWV), augmentation index (AI), and central blood pressure (CBP). Frequency and duration of MV use was assessed via self-report questionnaire at baseline. The cross-sectional association of MV use and arterial stiffness was evaluated by multivariate linear regression with adjustment for conventional CVD risk factors. We also performed subgroup analyses to evaluate effect modification between MV use and sex, age, body mass index (BMI), and hypertension. Results: A total of 470 (229 women and 241 men) COSMOS participants were included in this study, with mean age 69.1±5.2 years, of whom 150 (32%) reported current MV use at baseline. Multivariate linear regression analysis revealed that current MV use (yes versus no) was significantly associated with lower PWV (β:-0.59±1.02, p=0.004) but not associated with other measures of arterial stiffness, including AI or CBP. There were also no consistent associations between frequency and duration of MV use with any of the measures of arterial stiffness. Also, there was no effect modification by sex, age, BMI, or hypertension on the association between MV use and arterial stiffness. Conclusions: MV use was associated with lower PWV in older subjects. Further results from the COSMOS trial on randomized MV supplementation and changes in arterial stiffness over 2 years will further elucidate the effects of MV on arterial stiffness.

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