Understanding cumulative cultural evolution (original) (raw)

The Evolution of Individual and Cultural Variation in Social Learning

Trends in Ecology & Evolution, 2016

The version presented here may differ from the published version. If citing, you are advised to consult the published version for pagination, volume/issue and date of publication The evolution of individual and cultural variation in social learning

Culture and the evolution of social learning

Evolution and Human Behavior, 1997

Applications of modern evolutionary theory to human culture have generated several different theoretical approaches that challenge traditional anthropological perspectives. "Cultural selection" and "mind parasite" theories model culture as an independent evolutionary system because transmission of cultural traits via social learning is distinct from transmission of genes vla DNA replication. "Dual-inheritance" and "co-evolution" theories model culture as an intermediary evolutionary process that involves information from two inheritance systems: genetics and social learning. "Evolutionary psychology" theories emphasize that the evolutionary history of natural selection on mental processes links culture and biological adaptation; hence, cultural information is viewed as part of the organic phenotype and not an independent evolutionary system. Cross-cultural universals and scenarios of the "environment of evolutionary adaptedness" are used to identify characteristics of the "evolved mind" (human nature). "Behavioral ecology" theories examine relations between behavior and environmental context. Behavioral/cultural variations are viewed as products of flexible decision-making processes (evolved mind) that may respond adaptively to micro-environmental differences. It is difficult to devise empirical tests that distinguish among these theories, because they share many basic premises and make similar predictions about human behavior. Indeed, some of the apparent differences may be more semantic than substantive.

Social Learning Mechanisms and Cumulative Cultural Evolution: Is Imitation Necessary?

Psychological Science, 2009

Cumulative cultural evolution has been suggested to account for key cognitive and behavioral attributes which distinguish modern humans from our anatomically similar ancestors, but researchers have yet to establish which cognitive mechanisms are responsible for this kind of learning, and whether these are unique to humans. We have shown that human participants' cumulative learning is not always reliant on sources of social information commonly assumed to be essential. Seven hundred participants were organized into seventy microsocieties, and completed a task involving building a paper airplane. We manipulated the availability of opportunities for: imitation (reproducing actions); emulation (reproducing end results); and teaching. Each was independently sufficient for participants to show cumulative learning. Since emulative learning can elicit cumulative culture on this task, we conclude that accounts of the unusual complexity of human culture in terms of species-unique learning mechanisms do not currently provide complete explanations, and other factors may be involved.

Maintenance of prior behaviour can enhance cultural selection

Scientific Reports, 2021

Many cultural phenomena evolve through a Darwinian process whereby adaptive variants are selected and spread at the expense of competing variants. While cultural evolutionary theory emphasises the importance of social learning to this process, experimental studies indicate that people’s dominant response is to maintain their prior behaviour. In addition, while payoff-biased learning is crucial to Darwinian cultural evolution, learner behaviour is not always guided by variant payoffs. Here, we use agent-based modelling to investigate the role of maintenance in Darwinian cultural evolution. We vary the degree to which learner behaviour is payoff-biased (i.e., based on critical evaluation of variant payoffs), and compare three uncritical (non-payoff-biased) strategies that are used alongside payoff-biased learning: copying others, innovating new variants, and maintaining prior variants. In line with previous research, we show that some level of payoff-biased learning is crucial for pop...

Cultural transmission and the evolution of human behavior.pdf

The articles in this theme issue seek to understand the evolutionary bases of social learning and the consequences of cultural transmission for the evolution of human behaviour. In this introductory article, we provide a summary of these articles (seven articles on the experimental exploration of cultural transmission and three articles on the role of gene-culture coevolution in shaping human behaviour) and a personal view of some promising lines of development suggested by the work summarized here.

Repeated learning makes cultural evolution unique.pdf

Although genetic information is acquired only once, cultural information can be both abandoned and reacquired during an individual's lifetime. Therefore, cultural evolution will be determined not only by cultural traits' ability to spread but also by how good they are at sticking with an individual; however, the evolutionary consequences of this aspect of culture have not previously been explored. Here we show that repeated learning and multiple characteristics of cultural traits make cultural evolution unique, allowing dynamical phenomena we can recognize as specifically cultural, such as traits that both spread quickly and disappear quickly. Importantly, the analysis of our model also yields a theoretical objection to the popular suggestion that biological and cultural evolution can be understood in similar terms. We find that the possibility to predict long-term cultural evolution by some success index, analogous to biological fitness, depends on whether individuals have few or many opportunities to learn. If learning opportunities are few, we find that the existence of a success index may be logically impossible, rendering notions of "cultural fitness" meaningless. On the other hand, if individuals can learn many times, we find a success index that works, regardless of whether the transmission pattern is vertical, oblique, or horizontal. cultural fitness | diffusion | retention I n this paper, we will address the popular suggestion that biological and cultural evolution can be understood in similar terms (1-8).

Repeated learning makes cultural evolution unique

Proceedings of The National Academy of Sciences, 2009

Although genetic information is acquired only once, cultural information can be both abandoned and reacquired during an individual's lifetime. Therefore, cultural evolution will be determined not only by cultural traits' ability to spread but also by how good they are at sticking with an individual; however, the evolutionary consequences of this aspect of culture have not previously been explored. Here we show that repeated learning and multiple characteristics of cultural traits make cultural evolution unique, allowing dynamical phenomena we can recognize as specifically cultural, such as traits that both spread quickly and disappear quickly. Importantly, the analysis of our model also yields a theoretical objection to the popular suggestion that biological and cultural evolution can be understood in similar terms. We find that the possibility to predict long-term cultural evolution by some success index, analogous to biological fitness, depends on whether individuals have few or many opportunities to learn. If learning opportunities are few, we find that the existence of a success index may be logically impossible, rendering notions of "cultural fitness" meaningless. On the other hand, if individuals can learn many times, we find a success index that works, regardless of whether the transmission pattern is vertical, oblique, or horizontal. cultural fitness | diffusion | retention I n this paper, we will address the popular suggestion that biological and cultural evolution can be understood in similar terms (1-8).

Theoretical and empirical evidence for the impact of inductive biases on cultural evolution

Philosophical Transactions of the Royal Society B: Biological Sciences, 2008

The question of how much the outcomes of cultural evolution are shaped by the cognitive capacities of human learners has been explored in several disciplines, including psychology, anthropology and linguistics. We address this question through a detailed investigation of transmission chains, in which each person passes information to another along a chain. We review mathematical and empirical evidence that shows that under general conditions, and across experimental paradigms, the information passed along transmission chains will be affected by the inductive biases of the people involved-the constraints on learning and memory, which influence conclusions from limited data. The mathematical analysis considers the case where each person is a rational Bayesian agent. The empirical work consists of behavioural experiments in which human participants are shown to operate in the manner predicted by the Bayesian framework. Specifically, in situations in which each person's response is used to determine the data seen by the next person, people converge on concepts consistent with their inductive biases irrespective of the information seen by the first member of the chain. We then relate the Bayesian analysis of transmission chains to models of biological evolution, clarifying how chains of individuals correspond to population-level models and how selective forces can be incorporated into our models. Taken together, these results indicate how laboratory studies of transmission chains can provide information about the dynamics of cultural evolution and illustrate that inductive biases can have a significant impact on these dynamics.

The multiple roles of cultural transmission experiments in understanding human cultural evolution

Philosophical Transactions of the Royal Society B: Biological Sciences, 2008

In this paper, we explore how experimental studies of cultural transmission in adult humans can address general questions regarding the ‘who, what, when and how’ of human cultural transmission, and consequently inform a theory of human cultural evolution. Three methods are discussed. The transmission chain method, in which information is passed along linear chains of participants, has been used to identify content biases in cultural transmission. These concern the kind of information that is transmitted. Several such candidate content biases have now emerged from the experimental literature. The replacement method, in which participants in groups are gradually replaced or moved across groups, has been used to study phenomena such as cumulative cultural evolution, cultural group selection and cultural innovation. The closed-group method, in which participants learn in groups with no replacement, has been used to explore issues such as who people choose to learn from and when they lea...

UNDERSTANDING CULTURAL EVOLUTIONARY MODELS A REPLY TO READS CRITIQUE

2 This reply to Read's (2005) critique of my paper is divided into three parts. Part I clarifies Read's misinterpretations and mischaracterizations of both Dual Inheritance Theory in general and my model specifically. Part II addresses several problems in Read's empirical analyses of forager toolkits, and presents an alternative analysis. Part III tackles some common misunderstandings about the relationship between cost-benefit models (such as Read's) and cultural evolutionary modeling approaches, as well as highlighting some concerns with Read's efforts. In writing this, I have tried to introduce the reader to the issues in debate, but to fully understand this reply, one should read both my paper and Read's critique.