Subsequent Performance Research Articles

Do Managers Make Use of Increased Autonomy? Evidence from Large Scale Organizational Reform

The question of what is the right amount of managerial autonomy has been widely debated. The new public management movement argues that increased autonomy will be used by managers to improve organizational performance. Skeptics argue that managers in the public sector are likely to shy away from using increased autonomy. To bring the literature forward we theorize the link between reforms awarding managers increased autonomy and subsequent organizational performance outcomes. We identify four steps in this causal chain, which are easily conflated. We demonstrate empirically the potential of focusing on the intermediary mechanisms of increasing managerial autonomy. A large-scale municipal amalgamation reform in Denmark provides a unique opportunity to study the immediate impacts of changes in managerial autonomy in public schools. The results indicate that granting public managers more freedom has intermediary effects on factors such as hiring patterns and organizational demographics.

Interference of prototypical geometry representations in students’ construction of concepts and development of proofs

ABSTRACT This study investigates the impact of prototypical geometric representations on students’ ability to construct accurate geometric concepts and their subsequent performance in proving tasks related to those concepts. Ninety-one 11th-grade students participated in the study. We intentionally designed and utilized a questionnaire as the primary data-collection tool. We used the questionnaire items and findings as a basis for semi-structured interviews that we conducted with approximately 10% of the study participants. This allowed the integration of the quantitative and qualitative analyses, to provide a comprehensive understanding of the learning processes. Our analysis reveals that many Grade 11 students struggle with geometric concept formation due to an overreliance on prototypical examples, which in turn hinders their ability to construct proofs concerning the attributes of these concepts, highlighting the need for more diverse representations in geometry instruction.

Acute effect of injury-prevention-exercise-based warm-up vs. small-sided-game-based warm-up on speed performance in young amateur soccer players

Purpose: This study aimed to investigate the effects of an Injury-Prevention-Exercise (IPE)-based warm-up and a Small-Sided-Game (SSG)-based warm-up on subsequent speed performance in young soccer players. Method: Twelve male soccer players from the fourth division regional league in Algeria participated in the study. The participants completed both the IPE-based warm-up and the SSG-based warm-up in a counterbalanced order with a one-week interval between conditions. Linear and curved sprint performances, and change of direction (COD) speed, were assessed. Results: The results showed no significant differences between the two warm-up protocols in linear sprint performance (10m and 20m tests) or COD speed (zigzag test) (p > .05). However, in curved sprinting, the IPE-based warm-up demonstrated a significant improvement in the 8.5m curve sprint on the right side (p = .017, ES = -1.04). No significant differences were observed in the other curved sprint variables (17m on both sides and 8.5m on the left side). Conclusion: the findings suggest that the IPE-based warm-up may enhance speed performance in curved sprints. However, both warm-up protocols had similar effects on linear sprint performance and COD speed. Coaches and Strength and conditioning coaches should consider incorporating neuromuscular exercises in warm-ups to optimize curved sprint performance in young soccer players.

Early-life gut bacterial community structure predicts disease risk and athletic performance in horses bred for racing

Gut bacterial communities have a profound influence on the health of humans and animals. Early-life gut microbial community structure influences the development of immunological competence and susceptibility to disease. For the Thoroughbred racehorse, the significance of early-life microbial colonisation events on subsequent health and athletic performance is unknown. Here we present data from a three-year cohort study of horses bred for racing designed to explore interactions between early-life gut bacterial community structure, health events in later life and athletic performance on the racetrack. Our data show that gut bacterial community structure in the first months of life predicts the risk of specific diseases and athletic performance up to three years old. Foals with lower faecal bacterial diversity at one month old had a significantly increased risk of respiratory disease in later life which was also associated with higher relative abundance of faecal Pseudomonadaceae. Surprisingly, athletic performance up to three years old, measured by three different metrics, was positively associated with higher faecal bacterial diversity at one month old and with the relative abundance of specific bacterial families. We also present data on the impact of antibiotic exposure of foals during the first month of life. This resulted in significantly lower faecal bacterial diversity at 28 days old, a significantly increased risk of respiratory disease in later life and a significant reduction in average prize money earnings, a proxy for athletic performance. Our study reveals associations between early-life bacterial community profiles and health events in later life and it provides evidence of the detrimental impact of antimicrobial treatment in the first month of life on health and performance outcomes in later life. For the first time, this study demonstrates a relationship between early-life gut bacterial communities and subsequent athletic performance that has implications for athletes of all species including humans.

Reutilization of post-adsorption lanthanum-loaded straw alleviates phosphorus pollution in rice-wheat system: Subsequent performance and underlying mechanisms

Adsorption technology for phosphorus (P) removal is considered promising and reutilization of post-adsorbent can contribute to promoting sustainable agricultural production. However, the long-lasting impact of the post-adsorbent on crop growth and P remains unclear. This study assessed the effects of P-adsorbed lanthanum-modified straw (La@straw-P) on the rice yield, P fractionation and associated water quality parameters. The findings indicated that, compared with traditional fertilizer regimes, La@straw-P expedited the P reduction in the flooding water achieving a rate of decline to the tertiary standard for surface water (0.20 mg/L) 3.8 times faster and enhanced increased the P harvest index by 17.00 %. Economic estimation proved the positive benefits of La@straw-P in planting-breeding combination system. Redundancy analysis (RDA) and co-occurrence network analysis (CONA) revealed that electrical conductivity (EC) and dissolved Fe played primary roles in regulating total P. Fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), and soil P fractions collectively demonstrated that the abundant adsorption sites on La@straw-P could facilitate the transformation of active P into moderately Ca-bound P. This study proposes a strategy for recycling P-adsorbed materials to mitigate agricultural non-point P pollution.

Assessing Transition Cow Management in Dairy Cows for Improved Health, Milk Production, Pregnancy and Culling Outcomes

Understanding of the social environment has the potential to benefit dairy cow welfare and production. Our aim was to evaluate the associations of stocking density, calving density, days spent in a pre-partum group before calving (days spent in close-up, DCU) and the number of days from a pen filling event (addition of new cows to the pre-partum pen) on early-lactation health, production, pregnancy and culling outcomes in dairy cows. Data were gathered from 2780 cows in 2 herds. Herd management and reproductive records were analyzed for cows receiving treatment in the first 30 d of lactation (days in milk, DIM) for clinical mastitis, reproductive tract disease, ketosis, milk fever and displaced abomasum. Principal component analysis was used to account for the relationship between gestation length (GL) and DCU and their association with early lactation disease, milk production, pregnancy and culling outcomes. The effect of stocking density, the number of days from a pen filling event to calving and the calving density experienced by a cow in her week of calving was also evaluated. Causal inference was used to correct for confounding bias due to farm identity. The odds of disease in the first 30 DIM increased with stocking density before calving. A quadratic association was found between the first principal component (PC1), representing the combined effect of GL and DCU, and the odds of disease in multiparous cows only. Early lactation milk production and 305 d milk production in multiparous cows increased with PC1 score. Quadratic relationships were found between stocking density at d 8 to 2 before calving with both early lactation and 305 d milk production in multiparous cows but no associations were found in primiparous cows. Calving density showed a quadratic association with 305 d milk production in primiparous cows. The number of days from the last pen filling event to calving was not associated with changes in milk production. Disease occurrence was negatively associated with both early lactation and 305 d milk yield in multiparous cows but only with early lactation milk production in primiparous cows. The occurrence of disease was associated with a delayed time to pregnancy only in primiparous cows while both disease and being in lactation group ≥ 3 were negatively associated with time to pregnancy in multiparous cows. Week 4 milk (W4MK) was positively associated with reduced time to pregnancy in multiparous cows. For primiparous cows, increasing age at calving was associated with increased culling risk, while being in lactation group ≥ 3 was associated with increased culling risk in multiparous cows. Culling risk decreased with increasing W4MK in all cows. These results suggest that gestation length, time spent in close-up and stocking density are important factors influencing disease incidence in early lactation and subsequent lactation performance but had differing effects on primiparous versus multiparous cows. A better understanding of how pre-partum management factors influence postpartum health and milk production can help farms to plan facilities and organize the day-to-day management of cows and will assist in improving cow welfare and productivity.

Replacing soybean meal with fermented rapeseed meal in diets: potential effects on growth performance, antioxidant capacity, and liver and intestinal health of juvenile tilapia (Oreochromis niloticus).

This study aims to evaluate the effects of substituting soybean meal with fermented rapeseed meal (FRM) on growth, antioxidant capacity, and liver and intestinal health of the genetically improved farmed tilapia (GIFT, Oreochromis niloticus). A total of 450 tilapia (7.22 ± 0.15g) were fed with five experimental diets, including a basal diet containing 40% soybean meal (CP0), which was subsequently replaced by 25% (CP25), 50% (CP50), 75% (CP75), and 100% (CP100) FRM in a recirculated aquiculture system for 9weeks (30 fish per tank in triplicates). The results showed that the weight gain, specific growth rate, feed intake, feed efficiency, hepatosomatic index, and viscerosomatic index of fish in both CP75 and CP100 groups were significantly lower than those in CP0 group (P < 0.05). The fish in CP100 group had the lower content of muscle crude protein while the higher level of muscle crude lipid (P < 0.05). Activities of serum aspartate aminotransferase, alanine aminotransferase along with total triglyceride in CP100 group were significantly higher than those in CP0 group (P < 0.05). There were no significant differences in the contents of liver protease, amylase, and lipase among five groups (P > 0.05). The activities of liver total antioxidant capacity and superoxide dismutase exhibited the increased tendency with the increase of FRM replacement levels from 25 to 50% (P < 0.05), while then significantly decreased from 75 to 100% (P < 0.05). Histological morphology indicated that the fish in between CP75 and CP100 groups had poor liver and intestine health. Intestinal microbial diversity analysis showed that the relative abundance of Cetobacterium and Alcaligenaceae in both CP75 and CP100 groups were lower than that in other three groups. In conclusion, the maximum replacement level of soybean meal with FRM in the diet was determined to be 50% without compromising the growth performance, antioxidant status, and liver and intestinal health of tilapia under the current experimental conditions. The observed decrease in food intake and subsequent retarded growth performance in the CP75 and CP100 groups can be attributed directly to a reduction in feed palatability caused by FRM.

Effects of second litter syndrome on reproductive performance in sows.

The effects of second litter syndrome (SLS) on subsequent reproductive performance remain poorly understood. This study examined the impact of SLS on reproductive parameters such as piglets born alive (PBA), accumulative number of PBA (APBA), farrowing interval (FI), and risk of decreased PBA (DPBA) up to parity 5. Data on 5,464 litters were recorded from 1,507 sow cards collected on five swine farms in northern Vietnam. A linear mixed-effect model was used to analyze the effect of SLS on the PBA, APBA, and FI. A generalized linear mixed model was used to analyze the effect of DPBA in parity n on the risk of DPBA in parity n + 1. About 47.8% of the sows contracted SLS (720/1507). Only APBA1-2 was significantly decreased by SLS. The APBA3-5 in SLS sows was comparable to that in non-SLS sows (41.8 vs. 41.9). Non-DPBA2 upped the risk for DPBA3 by 3.6-fold (95% confidence interval [CI]: 2.8-4.6). Moreover, non-DPBA3 increased the risk of DPBA4 (odds ratio [OR] = 2.7, 95% CI = 2.1-3.7), and non-DPBA4 increased the risk of DPBA5 (OR = 3.2, 95% CI = 2.3-4.7). The risks of developing DPBA4 and DPBA5 remained unchanged following SLS (p > 0.05). About 98.4% of sows underwent PBA fluctuations during their first five parities. SLS does not appear to detrimentally affect PBA, APBA, and FI in subsequent parities. Therefore, SLS sows do not necessarily have future low reproductive performance or be culled. Future investigations should explore the mechanism of alternate decrease/increase patterns in PBA.

High-load and low-volume warm-up increases performance in a resistance training session

IntroductionA warm-up is recommended prior to performing a resistance training workout. Understanding the dose-response effect of warm-up load intensities can contribute to subsequent workout performance. The aim of this study was to compare different warm-up load intensities on subsequent resistance training volume in a workout. MethodsFifteen men who had at least six months of resistance training experience were evaluated. Three resistance training sessions were performed with warm-up load intensities of 40%, 60%, and 80% of the ten-repetition maximum was applied for 15, 10 and 5 repetitions, respectively. Each session consisted of the bench press, inclined leg press, and wide grip lat pulldown exercises performed for three sets to failure with 2 min rest between sets and exercises. ResultsThe 80% warm-up resulted in significantly greater total training volume (TTV) when compared to the 60% (p = 0.010) and 40% (p = 0.038) conditions. In addition, volume load and repetition performance were greater in the 80% condition versus the 60% condition for the bench press (p = 0.037 and p = 0.015, respectively). For the inclined leg press, the difference was close to significance with a probability value of p = 0.055 when comparing the 80% versus 40% protocols. ConclusionBefore starting a resistance training session, it is recommended that a warm-up for each exercise be performed at 80% of the initial workout load.

Correlation Analysis between Multiple Mini-Interviews during Medical Student Selection and Their Academic Performance

Multiple mini-interviews (MMI) have been used as a tool in the selection of medical students to evaluate their interpersonal and intrapersonal attributes. It is suggested that rigorous evaluation in MMI may predict academic performance during medical training. Thus, this study aims to determine the relationship between MMI scores and subsequent academic performance at the end of the preclinical phase. MMI scores for the academic session 2019/2020 intake in Universiti Putra Malaysia were gathered. The dependent variables were the students’ academic performance at the end of the preclinical phase involving the Professional Examination and Professionalism and Personal Development (PPD) course. No significant positive correlation was observed between MMI and total Professional Examination scores. Total MMI and empathy station scores have a weak positive relationship with objective structured clinical examination (OSCE) marks. There was also a significant positive correlation between resilience station scores and PPD peer assessment marks. In contrast, there was a negative correlation between Malay language station scores and the theory component of Professional Examination marks. This study suggests that MMI has the potential to predict in-programme clinical performance and professionalism characteristics. Studies with larger cohorts are essential to support this evidence.

Decoupling the effect of hydraulic oil contamination on the flotation performance of UG2 PGE ore and its interaction with alteration minerals

Oil contamination inadvertently arising from underground mechanised South African platinum mines is known to compromise the subsequent flotation performance. Anecdotal observations suggest that this is further exacerbated in the presence of phyllosilicate alteration minerals. Two ores of varying degrees of alteration from the Bushveld Igneous Complex were utilized in this study to investigate the effects of oil on UG2 platinum group element (PGE) ore flotation and investigate the interaction mechanisms between the oil and phyllosilicate alteration minerals. Mineralogical characterization of the ores indicated a higher percentage of the alteration phyllosilicate minerals in the altered ore (9.2 wt%) in comparison to the normal ore (5.6 wt%); with talc predominating in both ores. Baseline batch flotation test work indicated a reduction of grade with hydraulic oil addition in the normal ore (Pt by 4.5 g/t and Pd by 3.6 g/t), whereas valuable metal grades in the altered ore showed no change. In contrast to the grades, the Pt and Pd recovery dropped by 6 % and 12 %, respectively, in the altered ore floats whereas nearly constant recoveries were obtained for the normal ore as oil concentration increased. The dynamic froth stability and slurry viscosity both increased in the presence of oil and were greater in the altered ore compared to the normal ore. The observed flotation performance of the normal ore was attributed to the increasing froth stability which promoted the recovery of gangue minerals and consequent grade decrease. For the altered ore, the greater increase in the slurry pulp viscosity with oil addition was proposed to lead to poor gas dispersion and reduced interaction between bubbles and particles resulting in the reduction of recovery. The addition of sodium metasilicate successfully mitigated these effects causing a decrease in the viscosity, improvement in particle dispersion and better froth drainage. This study highlighted the potentially harmful effects of oil spillages from mechanised mining and its complex interaction with alteration minerals contained within the ore.

Power and reproducibility in the external validation of brain-phenotype predictions.

Brain-phenotype predictive models seek to identify reproducible and generalizable brain-phenotype associations. External validation, or the evaluation of a model in external datasets, is the gold standard in evaluating the generalizability of models in neuroimaging. Unlike typical studies, external validation involves two sample sizes: the training and the external sample sizes. Thus, traditional power calculations may not be appropriate. Here we ran over 900 million resampling-based simulations in functional and structural connectivity data to investigate the relationship between training sample size, external sample size, phenotype effect size, theoretical power and simulated power. Our analysis included a wide range of datasets: the Healthy Brain Network, the Adolescent Brain Cognitive Development Study, the Human Connectome Project (Development and Young Adult), the Philadelphia Neurodevelopmental Cohort, the Queensland Twin Adolescent Brain Project, and the Chinese Human Connectome Project; and phenotypes: age, body mass index, matrix reasoning, working memory, attention problems, anxiety/depression symptoms and relational processing. High effect size predictions achieved adequate power with training and external sample sizes of a few hundred individuals, whereas low and medium effect size predictions required hundreds to thousands of training and external samples. In addition, most previous external validation studies used sample sizes prone to low power, and theoretical power curves should be adjusted for the training sample size. Furthermore, model performance in internal validation often informed subsequent external validation performance (Pearson's r difference <0.2), particularly for well-harmonized datasets. These results could help decide how to power future external validation studies.

EXPRESS: Untangling the Duality of Emerging Market Firms’ Response to OFDI Policies on Their Innovation Performance: A Resource Dependence Perspective

Firms’ international expansion, affected by outward foreign direct investment (OFDI) policies of home countries, can greatly shape their innovation performance. Yet, existing literature lacks sufficient investigation toward the nexus between corporate response to policies in OFDI activities and subsequent innovation performance. Thus, the authors designed this study to examine how a firm’s response to OFDI policies affects its innovation performance. Drawing upon the resource dependence theory, the authors theorize corporate response to OFDI policies as firm dependence on home government. By arguing that such dependence differentially affects firm innovation through support and control mechanisms, they elucidate the inverted U-shaped relationship between corporate response to OFDI policies (measured by the percentage of a firm’s OFDI projects in policy-favored markets) and innovation performance (measured as patent counts). Furthermore, this curvilinear relationship, they posit, is moderated and strengthened by home-government subsidies the firm receives (calculated as the ratio of annual subsidies received to yearly sales). With archival data of 2,050 Chinese listed manufacturing firms responding to specific OFDI policies during 2013–2021, their predictions are corroborated. Overall, by illuminating the innovation implications of OFDI as corporate response to policies, this study contributes to the international marketing literature in the context of emerging markets.

Does it take two to tango? Combined effects of relational job crafting and job design on energy and performance

SummaryDespite an extensive body of research on job crafting, our understanding of how bottom‐up job crafting behaviors interact with top‐down job design in influencing employee effectiveness remains limited. Drawing on conservation of resources theory, we developed and tested a theoretical framework to examine the implications of daily promotion‐ versus prevention‐oriented relational job crafting on employees' energy and subsequent task performance, in the context of relational job design (i.e., task interdependence). To test our theorizing, we conducted two experience‐sampling studies over 10 workdays with full‐time employees across various organizations (Study 1: Nday‐level = 845, Nperson‐level = 126; Study 2: Nday‐level = 793, Nperson‐level = 108). Multilevel path modeling indicated promotion‐oriented relational job crafting was positively associated with subsequent task performance by increasing energy levels (Study 2), particularly when task interdependence was low (Study 1). In contrast, prevention‐oriented relational job crafting was energy depleting in low‐task‐interdependent contexts (Study 2) but increased employees' energy in high‐task‐interdependent contexts (Study 1). Our findings suggest different forms of day‐to‐day relational job crafting behaviors are relevant for employees' energy and performance, but their effectiveness may depend on the relational job‐design context.

Simulation and Analysis of Pressure Waves in Flow Channels of Axial and Radial Gas Wave Ejectors

Introduction: As an efficient energy transfer technology, the gas wave ejector (GWE) holds several patents poised to address the challenges of low-carbon energy. These patents find applications in numerous fields. Traditional axial-flow GWE patents encounter limitations under certain application conditions, whereas radial-flow GWE patents offer an effective solution to these issues. However, the mechanisms behind the performance differences between these two types of GWEs have not yet been studied. Objective: Since pressure waves are central to energy transfer in wave rotors, this study analyzes the coupling effects of centrifugal forces and pressure waves. By examining the differences in pressure wave intensity and propagation velocity within two types of wave rotor channels, the mechanisms underlying the performance disparities are elucidated. Method: Fluent was utilized for numerical simulations, and Response Surface Methodology was employed to model the influence of various factors. Result and Discussion: It can be observed that the propagation velocity and intensity of pressure waves changed under the influence of centrifugal forces. The propagation velocities of S1 and E2, which propagate in the same direction as the fluid flow within the rotor, increase 9% and 32% respectively, whereas the propagation speed of E1, which propagates in the opposite direction of the fluid flow, decreases 15%. Regarding the intensity of each pressure wave, the coupling effect of centrifugal force resulted in an increase of 1.04 to 2.55 kPa. This paper is the first to fit a relational expression for the speed differential of pressure wave propagation within axial and radial flow channels, correlating the main pressure wave velocities (S1, E1, E2) with flow channel length, rotational speed, compression ratio, and expansion ratio, thus providing a reference for GWE design and analysis. Through analysis of variance and significance tests, it is evident that each parameter significantly contributes to the fitting degree of the pressure wave propagation velocity difference (p &lt; 0.01). Furthermore, the inadequacy test (F-value=2.36~3.56) suggests a low level of discrepancy. Conclusion: The fundamental reason for the performance disparity between the two types of gas wave ejectors (GWE) lies in the discrepancies in pressure wave intensity and propagation velocity resulting from centrifugal force effects. Based on the fitted relationships, theoretical foundations can be provided for subsequent wave rotor design and performance analysis. For example, the differences in pressure wave propagation speed can inform the design and analysis of corresponding pressure ports.

Examining the Long-Term Impacts of Ergot Alkaloids on Fetal Heifer Development and Subsequent Growth and Reproductive Performance.

Consumption of toxic endophyte-infected tall fescue results in poor reproductive performance in domestic livestock. In this study, the objective was to evaluate the effects of ergovaline exposure during mid-gestation (days 93 through 188 of gestation) on dam performance, the growing female fetus, and the subsequent growth and reproductive performance of the gestationally-exposed heifer calves. Pregnant Angus and Simmental-Angus cows were blocked by age (2 - 3, 4 - 7, and > 7 y), body weight (BW), and breed; and then randomly assigned to graze either novel (EN; <5% infection rate; n = 27 Year 1, n = 16 Year 2) or toxic endophyte-infected tall fescue (EI; 99% infection rate; n = 27 Year 1, n = 17 Year 2). Weekly BW, body condition scores (BCS), hair coat scores (HCS), hair shedding scores (HSS), and blood samples for progesterone (P4) analysis were collected from mid-April through July of 2017 (Year 1) and 2018 (Year 2). Gestation length, birth weight, placental characteristics, heifer calf growth, onset of puberty, ovarian characteristics, and artificial insemination (AI) pregnancy rates were measured. Data were analyzed using the MIXED procedure of SAS. Cows grazing EI pastures had reduced ADG, reduced BCS, greater HSS, and decreased P4 concentrations compared to cows on EN pasture (P < 0.01). Birth weights were decreased for heifers whose dams were exposed to EI pastures during their second trimester (P < 0.01). Heifer pregnancy rates were not impacted by EI pasture exposure during gestation for either year of the study. However, a treatment by year effect was seen for pregnancy rate for EI exposed heifers in Year 2; EI exposed heifers in Year 2 had increased pregnancy rates at two of the inseminations. Combined, these data reinforce that consumption of toxic endophyte-infected tall fescue during gestation can negatively impact both dam and offspring performance. More studies are needed to evaluate more parameters in an effort to elucidate the possible life-long impacts of ergovaline exposure during gestation.

Supporting Healthy Affect and Coping After Perceived Failure in College Students in Christian Higher Education

Perceived failure in academic performance can lead to differing outcomes for students. Depending on the coping strategies that they choose, students may improve or worsen their performance. This study examined the relationship between affective components and coping strategies in college students’ responses to perceived academic failure and their subsequent academic performance. Data was collected from 122 undergraduate students in 200-level micro and macroeconomics classes at a four-year Christian university in Texas. Participants completed a battery of questionnaires, including the Positive and Negative Affect Schedule (PANAS) to measure positive and negative affect in response to their first exam grade and the Brief COPE Inventory to determine the strategies that participants used to cope with their perceptions of failure on their exam. The results showed that maladaptive coping strategies mediated the relationship between post-test negative affect and subsequent improvement in standardized test scores. This article serves as a call to Christian institutions of higher education to consider how to best support students in developing effective coping strategies when faced with failure.

Methods for assessment of rey auditory verbal learning test performance in memory clinic patients and healthy adults - at the cross-roads of learning theory and clinical utility

Background: Knowledge is still lacking regarding the preferred method for evaluation of learning in the Rey Auditory Verbal Learning Test (RAVLT). Validity of different methods was examined by the effect size in differentiating diagnostic stages in memory clinic patients versus healthy adults and the strength of association between RAVLT performance and brain atrophy. Method: The study included individuals with dementia (n = 247), Mild Cognitive Impairment (MCI, n = 709), Subjective Cognitive Impairment (SCI, n = 175) and cognitively unimpaired adults serving as healthy controls (HC, n = 102). All patients went through a comprehensive clinical examination and neuropsychological assessment of cognition including episodic memory gauged with RAVLT and brain imaging of medial temporal atrophy, cortical atrophy, and white matter hyperintensity. Results: The standard method for evaluation of learning in RAVLT (summed score over five trials) together with the late learning method (mean of trials 4 and 5) were the two most powerful methods according to group differentiation (discriminant validity). Both methods also showed considerable association with medial temporal atrophy (construct validity). The initial RAVLT performance represented by results on trial 1 and the constant in regression analysis with the power function provided information regarding attention that was important for the separation of SCI and HC. Conclusions: The most favorable clinical utility was indicated by discriminant and construct validity by total learning (standard method) including both attention- and learning-related parts and late learning of RAVLT performance, while theoretical understanding of mental processes involved in RAVLT performance was provided by the distinction between initial versus the subsequent learning performance.

Impact of a Digital Growth Mindset on Enhancing the Motivation and Performance of Chemistry Students: A Non-Cognitive Approach

The current study investigates the effects of a digital growth mindset on the motivation and success of chemistry students. The approach involves the use of technological tools that encourage students to face challenges and keep trying even when things become difficult. Students can achieve milestones by following this fruitful methodology. This study utilized a mixed-method design of an ordered–explanatory type, as identified in one of the categories of mixed-method approaches. The quantitative aspects of the research project were conducted using a matching-only pre-test–post-test control-group design. This was conducted because the study was carried out on secondary school students in Lahore, Pakistan, and the population included students up to the tenth grade. Only the experimental group participated in digital growth mindset activities. The control group was taught using traditional methods. The qualitative aspect of the study involved conducting focus group discussions with students in the experimental group. The results showed a significant improvement in motivation and chemistry achievement among the students in the experimental group, as evidenced by the higher mean scores from the pre-tests and the post-tests compared to the control group. The present research findings reveal that digital growth mindset interventions, when appropriately incorporated into chemistry curricula, possess the capacity to not only improve student engagement and subsequent performance but also to provide educators with valuable insights into instructional practices that are worth implementing in the digital era.

Acute Effects of Breath-Hold Conditions on Aerobic Fitness in Elite Rugby Players.

The effects of face immersion and concurrent exercise on the diving reflex evoked by breath-hold (BH) differ, yet little is known about the combined effects of different BH conditions on aerobic fitness in elite athletes. This study aimed to assess the acute effects of various BH conditions on 18 male elite rugby players (age: 23.5 ± 1.8 years; height: 183.3 ± 3.4 cm; body mass: 84.8 ± 8.5 kg) and identify the BH condition eliciting the greatest aerobic fitness activation. Participants underwent five warm-up conditions: baseline regular breathing, dynamic dry BH (DD), static dry BH (SD), wet dynamic BH (WD), and wet static BH (WS). Significant differences (p < 0.05) were found in red blood cells (RBCs), red blood cell volume (RGB), and hematocrit (HCT) pre- and post-warm-up. Peak oxygen uptake (VO2peak) and relative oxygen uptake (VO2/kgpeak) varied significantly across conditions, with BH groups showing notably higher values than the regular breathing group (p < 0.05). Interaction effects of facial immersion and movement conditions were significant for VO2peak, VO2/kgpeak, and the cardiopulmonary optimal point (p < 0.05). Specifically, VO2peak and peak stroke volume (SVpeak) were significantly higher in the DD group compared to that in other conditions. Increases in VO2peak were strongly correlated with changes in RBCs and HCT induced by DD warm-up (r∆RBC = 0.84, r∆HCT = 0.77, p < 0.01). In conclusion, DD BH warm-up appears to optimize subsequent aerobic performance in elite athletes.