Non-word repetition (NWR) is often utilized for the assessment of phonological short-term memory (PSTM) and as a clinical marker for language-related disorders. In this study, associations between children's language competence and their performance in language-specific NWR tasks as well as the relevance of NWR for the prediction of language development were scrutinized. German preschoolers (N = 1,801) were compared regarding their performance in NWR, German vocabulary, and articulation. For 141 children, results of a school enrolment test were available. Multilingual children performed as well as monolingual German-speaking children in NWR only under the condition of comparable German language skills. NWR performance depended on item length, children's vocabulary and articulation skills and was weakly associated with language-related medical issues. The predictive power of NWR for children's performance in the school enrolment test was minimal. To conclude, chosen German-based NWR tasks did not deliver convincing results as a clinical marker or predictor of language development.

We replicate Andreoni (Quarterly Journal of Economics 110: 1–21, 1995)’s finding that agents behave more selfishly when taking from a public account than when giving to a public good. Based on a neutral language setting we add new insights into motivations to give or take in a linear public good setting: we find that Andreoni’s result is partly driven by the complete elimination of giving options in the taking frame. However, a pure extension of the action space into the taking domain also leads to a significant increase in selfish behavior.

We experimentally test different rule-based contribution mechanisms in a repeated 4-player public goods game with endowment heterogeneity and compare them to a VCM, distinguishing between a random and an effort-based allocation of endowments. We find that endowment heterogeneities limit the efficiency gains from these rule-based contribution schemes under random allocation. Under effort-based allocations, substantial efficiency gains relative to a VCM occur. These are largely driven by significant reductions of contributions in VCM, while the rule-based mechanisms generate stable efficiency levels, even though falling short in realizing the maximal efficiency gains. Our results indicate that the procedure of endowment allocation impacts the perception of what constitutes a fair burden sharing.

The Circle of Security – Parenting (COSP™) is a psychoeducational intervention aiming at fostering secure child-parent attachment relationships. In a randomized controlled trial, we investigate the effect of COSP™ as an adjunct to care-as-usual compared to only care-as-usual for at-risk families. Mothers and their 2–12-month-old infants were randomized into COSP™ +care-as-usual (n = 197) for at-risk families in Copenhagen or only care-as-usual (n = 100). At-risk status was either mothers diagnosed with postpartum depression and/or infants showed social withdrawal. The primary outcome was maternal sensitivity which was coded with the Coding Interactive Behavior. Our secondary outcomes were maternal reflective functioning, assessed with the Parental Reflective Functioning Questionnaire – Infant Version, and child-mother attachment, assessed with the Strange Situation Procedure. Results showed no significant differences between the RCT groups on either the primary or secondary outcomes (all ps ≥ .146). We discuss these findings in relation to the applicability and targeted population who can benefit from COSP™, and whether alternative programs would be more effective for at-risk families with infants.

We report laboratory evidence on the voluntary provision of threshold public goods when the exact location of the threshold is not known. Our experimental treatments explicitly compare two prominent technologies, summation, and weakest link. Uncertainty in threshold location is particularly detrimental to threshold attainment under weakest link, where low contributions by one subject cannot be compensated by others. In contrast, threshold uncertainty does not affect contributions under summation. We demonstrate that non-binding pledges improve the chances of threshold attainment under both technologies, particularly under weakest link.

We investigate the role of endowment inequality in a local and global public goods setting with multiple group membership and examine the effect of temporal role reversal on cooperation decisions. Subjects can contribute to a global public good which benefits all subjects and two local public goods which benefit only subjects of either their own group or the group of the other endowment type. Endowment inequality per-se decreases contributions of subjects with a high endowment to the global public good, but increases cooperation of subjects with a low endowment on their local public good, thereby aggravating income disparities. Exogenously induced role reversal for several periods affects cooperation behavior of subjects with a high endowment positively and induces them to contribute more to the global good. Cooperation in unequal environments thus appears to be more stable when all parties have experienced the public goods game from the disadvantageous perspective.

Silicified microfossils are reported from nine stratigraphic sections of the Ediacaran Doushantuo Formation deposited in shelf margin, slope, and basin environments in Hunan Province of South China. These microfossils include sphaeromorphic and acanthomorphic acritarchs (15 genera and 29 species, including three new acanthomorph species, Bullatosphaera? colliformis n. sp., Eotylotopalla inflata n. sp., and Verrucosphaera? undulata n. sp.), multicellular algae, tubular microfossils, and other problematic forms, representing major fossil groups similar to those from the Doushantuo Formation in more proximal facies (e.g., inner shelf and shelf lagoon). A database of the abundance and occurrences of Doushantuo acanthomorphs is assembled and analyzed using quantitative and data-visualization methods (e.g., rarefaction analysis, non-parametric multidimensional scaling, and network analysis). The results show that, at the genus and species levels, taxonomic richness of Doushantuo acanthomorphs exhibits considerable variation among facies, but this variation is largely due to sampling and taphonomic biases. The results also show that numerous acanthomorph taxa have broad facies distribution, affirming their biostratigraphic value. The analysis confirms that acanthomorphs in the Weng'an biota of shelf margin facies are composed of a mixture of Member II and Member III assemblages of shelf-lagoon facies in the Yangtze Gorges area. The study shows the biostratigraphic potential of acanthomorphs in the establishment of regional biozones using the first appearance datum of widely distributed taxa, highlighting the importance of continuing exploration of under-sampled Doushantuo sections in slope and basinal facies.

UUID: http://zoobank.org/6fc92858-4054-4117-8043-1f06cfe77155

Evolutionary scientists argue that prosociality has been central to human ecological success. Theoretical models and behavioral experiments have found that prosociality, and cooperation in particular, is conditional and context dependent, that individuals vary in their propensity to cooperate, and that reciprocity stabilizes these behaviors within groups. Experimental findings have had limited validation with observations of behavior in natural settings, especially in organizational contexts. Here, we report in situ measurements of collective action where reciprocity is abundant in organizations embedded in a cash economy. We study small ‘food clubs’ where members share bulk purchases and are considered to be heavily dependent on cooperation. We take advantage high resolution data of economic interactions for 1,528 individuals across 35 clubs over a combined 107 years of operation. We develop a network method to detect different directional and temporal forms of economic reciprocity, and statistically classify individual behavioral types akin to those in experiments. We find abundant direct reciprocity, supplemented by indirect reciprocity, and that members of most clubs can be identified as consistent reciprocators. This study provides initial observational evidence that economic reciprocity may be more abundant in real world settings, sharpening the findings of the behavioral study of cooperation and contributing to the more naturalistic study of reciprocity and prosociality.

A 15-year-old male presented with vasovagal syncope and troponin leak 4 days after his second COVID-19 vaccine. Based on initial diagnostic work-up, he was thought to have COVID-19 vaccine-associated myocarditis. His cardiac dysfunction persisted and further work-up including genetic evaluation and serial MRI studies later confirmed a diagnosis of arrhythmogenic cardiomyopathy. This is a unique case of an incorrect diagnosis based on timing and context of vaccine-related myocarditis. Reports of mild and self-limited myocarditis post-COVID-19 vaccination may cause vaccine hesitancy among the public, and so case reports such as this one show the importance of discerning underlying conditions amongst rare COVID-19 vaccination complications.

When the impact of populism on liberal democracy is examined, the focus often is on populists in power. After all, when in office, populists have the possibility to change legislation, thereby negatively affecting individual freedoms and rights, and to transform the political system, often toward democratic decline and illiberalism (Pappas 2019; Ruth-Lovell and Grahn 2023).1 Far less attention has been devoted to populist parties in opposition, even though this is the position in which populists find themselves most frequently.2 Prominent examples of Western European populist parties with a decades-long position in opposition include the Rassemblement National in France and the Vlaams Belang in Belgium on the right and Die Linke in Germany and the Socialistische Partij in the Netherlands on the left. Outside of Western Europe, populist parties often have less longevity and more frequently assume office. However, many of these parties spend years in opposition before taking on government responsibility and/or have returned to the opposition benches afterwards (e.g., Partido Justicialista in Argentina and Prawo i Sprawiedliwość in Poland).

Women are often viewed as more romantic than men, and romantic relationships are assumed to be more central to the lives of women than to those of men. Despite the prevalence of these beliefs, some recent research paints a different picture. Using principles and insights based on the interdisciplinary literature on mixed-gender relationships, we advance a set of four propositions relevant to differences between men and women and their romantic relationships. We propose that relative to women: (a) men expect to obtain greater benefits from relationship formation and thus strive more strongly for a romantic partner, (b) men benefit more from romantic relationship involvement in terms of their mental and physical health, (c) men are less likely to initiate breakups, and (d) men suffer more from relationship dissolution. We offer theoretical explanations based on differences between men and women in the availability of social networks that provide intimacy and emotional support. We discuss implications for friendships in general and friendships between men and women in particular.