{"title":"Excess Capacity Learning.","authors":"Marina Dubova, Sabina J Sloman","doi":"10.1017/S0140525X2610510X","DOIUrl":"https://doi.org/10.1017/S0140525X2610510X","url":null,"abstract":"<p><p>We introduce a new framework for understanding how cognitive systems (e.g., humans) learn from experience, based on the concept of <i>representational capacity</i>-the relative amount of representational resources devoted to encoding past experiences. Most paradigms in cognitive science have operated under the assumption that these resources are constrained, forcing cognitive systems to compress rich and noisy experiences to effectively generalize to new situations. We leverage recent advances in computer science to outline the implications of learning with <i>excess capacity</i>, or applying even more representational resources than needed to perfectly memorize all the details of one's past experiences. In particular, we review evidence suggesting that excess capacity systems can exhibit many of the characteristics of human learning, such as the simultaneous ability to memorize individual experiences and generalize knowledge to new situations. We define and differentiate between <i>constrained</i> (not enough), <i>sufficient</i> (just enough), and <i>excess</i> (more than enough to perfectly capture all the details of one's past experiences) capacity. We derive empirical properties of learning in each of these capacity regimes, and compare these predictions to effects documented for human learning. We highlight the broad implications of this framework for advancing theoretical and empirical work across cognitive, clinical, and developmental psychology.</p>","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":" ","pages":"1-77"},"PeriodicalIF":13.7,"publicationDate":"2026-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147670066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Severine B S W Hex, Erin S Isbilen, Morten H Christiansen, Daniel I Rubenstein
{"title":"Multimodality as a safeguard of honesty in communication and language: from Animals to Humans.","authors":"Severine B S W Hex, Erin S Isbilen, Morten H Christiansen, Daniel I Rubenstein","doi":"10.1017/S0140525X26105093","DOIUrl":"https://doi.org/10.1017/S0140525X26105093","url":null,"abstract":"<p><p>From spider dances to human language, multimodality is ubiquitous in natural communication systems. Much scholarship has been devoted to investigating why multimodality evolved and the role it plays in communication. Here, we highlight the role of multimodality in safeguarding the most fundamental prerequisite of all functioning, extant communication systems: honesty. We begin by introducing the arms race between honesty and deception in natural communication systems, and the critical role socially-mediated controls can play in maintaining signal honesty when classic, intrinsic costs are not sufficient. We next introduce three ways by which multimodality buffers signal honesty by 1) providing insurance against signal unreliability in dynamic environments, 2) forming an honest, multimodal gestalt with which to cross-validate signal honesty, and 3) increasing signal complexity, making the entire signal harder to fake. We then discuss the case of highly cooperative societies, with human language emphasized, and argue that signal honesty is important especially in complex and cooperative societies wherein the need to cooperate and be accepted as part of the group may supersede honesty. Finally, we propose future directions wherein human and non-human communication research could expand beyond the well trodden realms of competition and mate attraction to investigate the role of multimodality and honesty in cooperative, \"cheap\" signals, and emphasize the importance of drawing from both the human and non-human literatures in investigating the forces that have shaped the evolution of communication.</p>","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":" ","pages":"1-64"},"PeriodicalIF":13.7,"publicationDate":"2026-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147353569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Benoît de Courson, Willem E Frankenhuis, Daniel Nettle
{"title":"Explaining the paradoxical effects of poverty on risk taking: The Desperation Threshold Model.","authors":"Benoît de Courson, Willem E Frankenhuis, Daniel Nettle","doi":"10.1017/S0140525X26104567","DOIUrl":"https://doi.org/10.1017/S0140525X26104567","url":null,"abstract":"<p><p>The impacts of poverty and material scarcity on human decision making appear paradoxical. One set of findings associates poverty with risk aversion, whilst another set associates it with risk taking. We present an idealised rational-choice model, the Desperation Threshold Model (DTM), that explains how both these accounts can be correct. The DTM assumes that there are basic needs whose satisfaction is not fully divisible. This generates an S-shaped utility function for material resources. The value of gaining a dollar is at first small (because even with the extra dollar, basic needs still cannot be met); then large (because the extra dollar enables basic needs to be met); and then small again. Just above the basic needs threshold, people's main concern is not falling below, and they are predicted to avoid risk especially strongly. Below the threshold, their most important concern is jumping above, and they are predicted to take risks that would otherwise be avoided. Versions of the DTM have been proposed under various names across biology, anthropology, economics and psychology. We review a broad range of relevant empirical evidence from a variety of societal contexts. Though the model primarily concerns individual decision making, it connects to a range of population-scale and societal issues such as: the consequences of economic inequality; the deterrence of crime; and the optimal design and behavioural consequences of the welfare state. We discuss interpretative issues, and suggest areas for future DTM research that bridges disciplines.</p>","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":" ","pages":"1-51"},"PeriodicalIF":13.7,"publicationDate":"2026-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147269936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A new algorithm of human attention - ERRATUM.","authors":"Mario Belledonne, Ilker Yildirim","doi":"10.1017/S0140525X25104524","DOIUrl":"https://doi.org/10.1017/S0140525X25104524","url":null,"abstract":"","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":"48 ","pages":"e193"},"PeriodicalIF":13.7,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145779985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"'Our Roots Run Deep': Historical Myths as Culturally Evolved Technologies for Coalitional Recruitment - CORRIGENDUM.","authors":"Amine Sijilmassi, Lou Safra, Nicolas Baumard","doi":"10.1017/S0140525X25103968","DOIUrl":"https://doi.org/10.1017/S0140525X25103968","url":null,"abstract":"","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":"48 ","pages":"e191"},"PeriodicalIF":13.7,"publicationDate":"2025-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145660010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Is feminism capable of slowing down life history strategies? - ERRATUM.","authors":"Konrad Szocik","doi":"10.1017/S0140525X2510397X","DOIUrl":"https://doi.org/10.1017/S0140525X2510397X","url":null,"abstract":"","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":"48 ","pages":"e192"},"PeriodicalIF":13.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145647034","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Mental abstraction aids group cohesion in large social networks.","authors":"Yi-Fei Hu, Alice Xia, Oriel FeldmanHall","doi":"10.1017/S0140525X25100514","DOIUrl":"https://doi.org/10.1017/S0140525X25100514","url":null,"abstract":"<p><p>Human social networks are far larger than those of nonhuman primates. Maintaining cohesion in large networks requires a robust mechanism that can accommodate the dense webs of connections within communities. A parsimonious account of how humans achieve social cohesion is <i>mental abstraction</i>, which enables individuals to construct fuzzy network representations that facilitate information flow tracking and mitigate conflict.</p>","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":"48 ","pages":"e170"},"PeriodicalIF":13.7,"publicationDate":"2025-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145628014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Primates' social cognitive bonding mechanisms are more complex than we thought, yet not quite human-lessons from great ape triadic social bonding.","authors":"Wouter Wolf","doi":"10.1017/S0140525X2510054X","DOIUrl":"https://doi.org/10.1017/S0140525X2510054X","url":null,"abstract":"<p><p>The current manuscript rightly points out that non-human primates evolved complex social cognitive skills to maintain weaker social ties. However, these capacities are likely more expansive than currently proposed: research shows that apes behave more socially to those with whom they experience similar things, suggesting that they possess some precursor of humans' capacity to bond through shared experiences.</p>","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":"48 ","pages":"e188"},"PeriodicalIF":13.7,"publicationDate":"2025-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145628033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"What human trust networks reveal about cognitive mechanisms of group cohesion in primates.","authors":"Cristina Acedo-Carmona, Antoni Gomila","doi":"10.1017/S0140525X25101465","DOIUrl":"https://doi.org/10.1017/S0140525X25101465","url":null,"abstract":"<p><p>Drawing on our previous work on human trust networks, we provide further evidence of how group structure can foster group cohesion. But this work also raises doubts about two central tenets of the target paper: (1) the role assigned to cognitive abilities in group cohesion and stabilization; and (2) the emphasis on group size as the critical variable.</p>","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":"48 ","pages":"e163"},"PeriodicalIF":13.7,"publicationDate":"2025-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145628209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Cognitive perception of social stress as a critical mechanistic control of mood and mood-related brain signals.","authors":"Henrik Jörntell","doi":"10.1017/S0140525X25100496","DOIUrl":"https://doi.org/10.1017/S0140525X25100496","url":null,"abstract":"<p><p>The paper of Dunbar (2025) on social stress is a strong demonstration that stress in itself can have a purely cognitive origin. The paper shows that the cognitive system can have profound impacts on the hypothalamus. As detailed in my commentary, this opens up new avenues of how to interpret psychiatric conditions, placebo, and other associations between perceptions and vegetative functions in the brain.</p>","PeriodicalId":8698,"journal":{"name":"Behavioral and Brain Sciences","volume":"48 ","pages":"e171"},"PeriodicalIF":13.7,"publicationDate":"2025-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145628356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"心理学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}