Perfectionism shapes the way adolescents perceive family acceptance over time

Previous theory and research linked perfectionism to contingent self-worth and conditional acceptance, but little research directly investigated how adolescents’ perfectionism and their perceived family acceptance shape each other over time. The present study is the first to investigate the reciprocal longitudinal relations between adolescents’ perfectionism and their perceived family acceptance. The study examined a sample of 264 adolescents (aged 14–19 years) over a period of 3 months, using a cross-lagged longitudinal design with two time points. Results showed that perfectionistic standards predict relative increases, whereas perfectionistic concerns predict relative decreases in adolescents’ perceived mother, father, and family acceptance. However, perceived family acceptance did not predict significant changes in perfectionistic standards nor in perfectionistic concerns. Considering this, the results emphasize the role of perfectionism as a predictor for perceptions of mother, father, and family acceptance and capture how perfectionism may shape interpersonal experiences within the family. Implications of these findings for both research and practice are discussed.

How can logistics service providers foster supply chain collaboration in logistics triads? Insights from the Italian grocery industry

Purpose Collaborative solutions are increasingly being proposed to generate value in supply chains. Concurrently, firms have progressively outsourced logistics operations to logistics service providers (LSPs). However, many questions remain unsolved regarding the role played by LSPs in supporting supply chain collaboration (SCC) in triadic rather than dyadic contexts. This study aims to explore the relational mechanisms that LSPs can leverage to foster value creation through collaboration, elaborating on an existing theory about SCC by focussing on logistics triads. Design/methodology/approach By leveraging the view of the network theory, a multiple case study approach was adopted. Seven cases having logistics triads as units of analysis were identified and analysed within the Italian grocery supply chain, allowing for empirical investigation with a middle-range approach to extend the previous theory. Findings LSPs are pivotal actors that can actively promote SCC. LSPs can exploit large volumes and asset availability to increase efficiency while improving logistics flexibility and developing regular and trustworthy relationships with the other triad members. Building upon their logistics capabilities and the relational mechanisms in place, LSPs can help manufacturers collaborate with retailers by improving mutual trust and communication, acting as trust builders or trust conductors within the triad. Originality/value The study explores the role of LSPs in logistics triads, extending the previous literature. It highlights that LSPs facilitate not only supply and demand integration but also relational integration between firms. Trust emerges as a fundamental building block for SCC, as LSPs can look beyond economic benefits to foster partnerships that empower the co-development of original collaborative solutions.

Re-Conceptualizing Solitude in the Digital Era: From “Being Alone” to “Noncommunication”

This article revisits the theoretical terrain surrounding solitude to address conceptual, methodological, and practical challenges manifest in the digital era. First, solitude has been approached from a number of different research traditions, resulting in disconnected streams of theory. Furthermore, these streams were developed before the rise of the Internet and mobile media. As a result, solitude is commonly, if not most commonly, conceptualized and measured as a matter of being physically alone. This article re-conceptualizes solitude as “noncommunication” to offer a more contemporary and inclusive perspective, one that uproots it from ideations of physical aloneness and replants it in social aloneness. Whereas previous theory in this area often ignores mediated interaction, we recognize it as a meaningful way for people to connect, with important implications for solitude. Our framework also calls for interrogation of key contextual factors that condition whether and how solitude is experienced in the digital era.

Relatedness and the evolution of mechanisms to divide labour in microorganisms

Division of labour occurs when cooperating individuals specialise to perform different tasks. In bacteria and other microorganisms, some species divide labour by random specialisation, where an individual’s role is determined by random fluctuations in biochemical reactions within the cell. Other species divide labour by coordinating across individuals to determine which cells will perform which task, using mechanisms such as between-cell signalling. However, previous theory, examining the evolution of mechanisms to divide labour between reproductives and sterile helpers, has only considered clonal populations, where there is no potential for conflict between individuals. We used a mixture of analytical and simulation models to examine non-clonal populations and found that: (1) intermediate levels of coordination can be favoured, between the extreme of no coordination (random) and full coordination; (2) as relatedness decreases, coordinated division of labour is less likely to be favoured. Our results can help explain why coordinated division of labour is relatively rare in bacteria, where groups may frequently be non-clonal.

Polygenic signals of sexually antagonistic selection in contemporary human genomes

Mutations that increase fitness in one sex may decrease fitness in the other. Such “sexually antagonistic” (SA) genetic variants can constrain adaptation and increase variability for fitness components (e.g., survival, fertility, and disease susceptibility). However, detecting SA selection in genomes is immensely challenging, as it requires prohibitively large datasets that combine genomic sequences with individual fitness measurements. Here, we use genotypic and reproductive success data from ∼250,000 UK Biobank individuals to comprehensively assess the extent of SA genetic variation in humans. We first develop new theoretical models for signals of SA selection spanning a full generational life cycle—including SA polymorphisms affecting survival, reproductive success and overall fitness. Comparing our models with UK Biobank data, we uncover multiple empirical signals of polygenic SA selection, including sex-differential effects of genetic variants on each fitness component, and positive correlations between sex-differential effects and minor allele frequencies. We show that these signals cannot be explained by simple models of sex differences in purifying selection, or by potential confounders such as population structure and sequence mapping errors. We further show that candidate SA sites disproportionately affect functional genomic regions, including polymorphisms associated with quantitative traits and disease. Finally, we examine historical evolutionary processes affecting candidate SA sites, which are consistent with the drift-dominated dynamics predicted by previous theory. Overall, our results support SA genomic variation in humans and highlight its broader functional and evolutionary consequences.

Are cognition and personality related in budgerigars?

In recent years, researchers have been attempting to relate differences in personality (e.g., boldness, aggressiveness, exploration tendency) to variation in cognition (performances in tasks that require learning, reasoning, attention, or memory, etc.) both theoretically and empirically. However, it is unclear on what basis personality and cognition might be associated with each other. Previous theory suggests a connection between fast–slow personality types and cognitive speed–accuracy tradeoffs. In this study, we tested this hypothesis in budgerigars and found that, in their 1st associative learning, birds with fast personality (less fearful of handling stress) were fast learners in the beginning, while slow personality individuals improved faster, but both types of birds did not differ in accuracy. However, these relationships were context-dependent. No significant relationship was found in subsequent learning tasks (reversal learning and a 2nd associative learning) in the familiar context (task setup and apparatus similar to the 1st associative learning). We then conducted a problem-solving experiment with novel setup and apparatus to test 1 possible explanation that the association between personality and cognition in the 1st associative learning might be caused by noncognitive constraint, such as fearfulness when facing novel task setup and apparatus. We found that fast individuals interacted more with the problem box and solved it, whereas the slow birds were not. We suggest that personalities can influence cognitive performances and trigger a cognitive speed-improvement tradeoff under the novel context. However, there are no consistent cognitive styles that co-varied with different personalities.

Analysis On Motivation In Learning English Among Pesantren Students And Its Correlation With English Language Proficiency

This quantitative descriptive research investigates correlation between English learning motivation among Pesantren students and their English language proficiency. Pesantren community is a unique environment to learn foreign language combining the process of nurturing Islamic values and discipline. 25 students of X grade from IPS (Social) major are involved in this study. A questionnaire measuring type of motivation and its value is used to collect data related to the motivation, while the English proficiency is measured through School based examination score and independent English language proficiency designed by the researcher. Analysis on the collected data is done through SPSS version 26. The finding revealed that there are four types of motivation among Pesantren students in learning English, those are: [1] Instrumental; [2] Integrative; [3] Extrinsic; and [4] Intrinsic. Each of these type has been proven to have a significance correlation with students English language proficiency. Thus it strengthen the previous theory stating that motivation plays significant role in learning. The most dominant type of motivation among Pesantren students is instrumental motivation.

Kualitas Laba dan Tingkat Manipulasi Laporan Keuangan dimata Investor Pasar Modal Sektor Pertambangan. Pentingkah?

This study aims to prove empirically whether the earnings quality and the level of financial statement manipulation have an effect on the company market value. The study used sample of 3 years from 2017 to 2019. Using the multiple linear regression method, it was found that the quality of earnings has a negative effect on the market value of the company and is contrary to previous theory and research. Meanwhile, the level of financial statement manipulation has no effect on the company's market value. These results indicate that the quality of earnings and the degree of manipulation of financial statements are not the main information used by capital market players in determining their investment choices. Capital market players prefer other methods of analysis in determining their investment options.

METODOLOGI PROGRAM RISET IMRE LAKATOS

This research was based on the limitations of the human mind itself in providing and obtaining reasonable explanations, because at that time the desire to know something was obstructed from various myths which existedin that society so that myths were embedded in human mind. The focus of this research was on the methodology of the Imre Lakatos research program. The purpose of this study was to determine the process of research program methodology from Imre Lakatos. The method used in this research was library research, where the researchers looked for and read sources that match the title to be studied, such as books, articles, writings and journals that were relevant.The results of this study in the Imre Lakatos research program methodology included: First, the core (hardcore) functions as a negative heuristic. Second, the protective-belt which consisted of auxiliary hypotheses in the initial conditions. Third, a series of theories (a series theory), theory linkages where the next theory was the result of the auxiliary clauses added from the previous theory.

On the Role of Bottom Pressure Torques in Wind-Driven Gyres

Previous studies have concluded that the wind-input vorticity in ocean gyres is balanced by bottom pressure torques (BPT), when integrated over latitude bands. However, the BPT must vanish when integrated over any area enclosed by an isobath. This constraint raises ambiguities regarding the regions over which BPT should close the vorticity budget, and implies that BPT generated to balance a local wind stress curl necessitates the generation of a compensating, nonlocal BPT and thus nonlocal circulation. This study aims to clarify the role of BPT in wind-driven gyres using an idealized isopycnal model. Experiments performed with a single-signed wind stress curl in an enclosed, sloped basin reveal that BPT balances the winds only when integrated over latitude bands. Integrating over other, dynamically motivated definitions of the gyre, such as barotropic streamlines, yields a balance between wind stress curl and bottom frictional torques. This implies that bottom friction plays a nonnegligible role in structuring the gyre circulation. Nonlocal bottom pressure torques manifest in the form of along-slope pressure gradients associated with a weak basin-scale circulation, and are associated with a transition to a balance between wind stress and bottom friction around the coasts. Finally, a suite of perturbation experiments is used to investigate the dynamics of BPT. To predict the BPT, the authors extend a previous theory that describes propagation of surface pressure signals from the gyre interior toward the coast along planetary potential vorticity contours. This theory is shown to agree closely with the diagnosed contributions to the vorticity budget across the suite of model experiments.