Traditionally, the capacity for imagination and pretense has been considered a defining characteristic of humans, thought to emerge early in childhood and integral to complex social behaviors and problem-solving. However, the Johns Hopkins research undermines this assumption by providing empirical evidence that an enculturated bonobo can track and interact with objects that are purely imaginary, thereby expanding our understanding of the evolutionary roots of imagination. These insights suggest that such cognitive abilities likely trace back 6 to 9 million years to our last common ancestors with apes.

At the center of this research was Kanzi, a 43-year-old bonobo who has been extensively studied for his language comprehension and interaction capabilities. In controlled settings, Kanzi participated in a series of tasks designed to simulate human pretense, such as pretending to pour juice into empty cups or placing invisible grapes inside containers during a mock tea party. Remarkably, Kanzi not only responded appropriately to these pretend scenarios but reliably identified the location of these imaginary objects, highlighting a sophisticated understanding of symbolic representation.

The primary experiment involved transparent cups and a pitcher, where an experimenter pretended to pour juice into the cups before asking Kanzi to indicate which contained juice. Despite no actual liquid being present, Kanzi correctly pointed to the imagined “filled” cup, a response that remained consistent even when the location of the cup was changed. This demonstrated that Kanzi was not relying solely on perceptual cues but was engaging in cognitive processes involving mental representation and inference.

To rule out the possibility that Kanzi simply expected real juice to be hidden in the cups, a second experiment introduced both a real cup of juice and an empty cup “filled” with pretend juice. When asked to choose what he wanted, Kanzi predominantly selected the real juice, indicating a clear differentiation in his cognitive processing between real and imaginary objects. This discriminative behavior strengthens the argument that Kanzi was genuinely engaging with the concept of pretense rather than reacting to stimuli based on expectation or habit.

The researchers extended this line of inquiry by involving pretend grapes and similar scenarios where physical evidence was absent, yet Kanzi successfully tracked the pretend items’ locations. Although Kanzi was not flawless in every trial, his consistent accuracy provides compelling evidence that the ape could maintain and manipulate mental representations of objects that do not exist in the immediate environment. This finding refutes the previously held notion that such cognitive processes are an exclusive hallmark of human minds.

This study’s implications are profound, posing a significant paradigm shift in cognitive science and animal psychology. The ability to conceive of objects not present challenges simplistic views of animal intelligence as purely reactive or immediate. Instead, it suggests a complex mental life wherein apes can conceive narratives, scenarios, and possibly anticipate future events by simulating possibilities mentally—a capacity critical for planning and social behavior.

Moreover, the methodology employed—drawing from naturalistic pretend play scenarios that mirror early childhood behavior—adds a novel dimension to comparative psychology. Unlike anecdotal observations of animal play in the wild or captivity, these controlled experiments provide replicable data supporting the conceptualization of shared cognitive traits across species. This could pave the way for broader research investigating the extent and limits of imagination in other nonhuman animals.

Co-author Amalia Bastos emphasized the significance of Kanzi’s ability, highlighting how it reflects a mental capacity to generate abstract ideas while simultaneously understanding their unreality. This dual cognitive process is a cornerstone of imaginative thought and suggests a level of self-awareness and executive function that may have been underestimated in nonhuman primates. The researchers hope future studies will explore related aspects, such as theory of mind and future-oriented cognition in apes.

Christopher Krupenye, the assistant professor leading the study, contextualizes these findings within a historical framework akin to Jane Goodall’s discovery of tool use in chimpanzees. Just as Goodall’s work shifted perceptions of what distinguishes humans from other primates, so too could this new evidence reshape our understanding of the mental lives of other creatures. It urges a reconsideration of the ethical and conservation imperatives that stem from recognizing cognitive complexity in apes.

This research also represents a call to action, with Krupenye advocating for increased protection of apes whose sophisticated minds deserve respect and preservation. Given the threats these animals face due to habitat loss and human activity, acknowledging their rich cognitive lives underscores the urgency of conservation efforts. The study not only advances scientific knowledge but also frames an ethical dialogue about human responsibilities toward intelligent nonhuman species.

Published in the prestigious journal Science, these research findings mark a milestone in the interdisciplinary examination of animal minds—bridging psychology, evolutionary biology, and anthropology. Moving forward, the team envisions expanding their experimental framework to include other species, testing whether imaginative capacities manifest beyond apes, and what evolutionary advantages such cognitive traits confer in the natural world.

In sum, the Johns Hopkins study illuminates the mental sophistication of apes through compelling evidence that they can engage in pretend play, a cognitive domain long held as a uniquely human province. This discovery not only enriches our understanding of animal psychology but also invites a profound reconsideration of humanity’s place on the continuum of intelligence, imagination, and consciousness.

Subject of Research: Animal Psychology, Cognitive Psychology, Imagination in Apes

Article Title: Evidence for representation of pretend objects by Kanzi, a language trained bonobo

News Publication Date: 5-Feb-2026

Web References: DOI link

Image Credits: Johns Hopkins University

Keywords: Animal psychology, Cognitive psychology

At the core of this research is the understanding that animals, like humans, are subjected to various environmental stimuli that often present conflicting information. This scenario compels them to evaluate the validity of multiple reward sources, which is critical for their survival. Animals equipped with these cognitive abilities can distinguish between varying degrees of reward to make more informed choices in their everyday lives. The findings from this study promise to deepen our understanding of both animal and human psychology, revealing the evolutionary significance of such decision-making processes.

Utilizing a series of behavioral experiments, the researchers set out to quantify how animals prioritize conflicting information over time. This was grounded in the assumption that animals learn from their environments and adapt their decision-making strategies as they gather more information. The approach involved providing test subjects with distinct reward options, thereby creating a framework in which conflicting cues emerged. The results elucidated how attentional biases and temporal dynamics shape the decision-making strategies of these animals, as they navigate reward-related challenges.

One remarkable observation from the experiments indicated that certain species, such as rats and pigeons, demonstrated a cognitive flexibility that allowed them to reassess their choices as new information became available. This flexibility is crucial, as it suggests that the ability to evaluate changing conditions not only enhances survival likelihood but also reflects complex cognitive processing abilities fundamental to many species. As the study reveals, this capacity to weigh conflicting information is not merely an instinctive reaction but rather a dynamic cognitive function honed through evolution.

Moreover, it was noted that the time factor plays a pivotal role in how animals reconcile conflicting rewards. The researchers observed that the longer an animal deliberated on their options, the more likely they were to adapt their choices based on their experiences. This finding highlights a phenomenon termed “temporal discounting,” where the value of a reward changes over time based on a variety of factors, including previous experiences and changing environmental conditions. Such insights can help elucidate not only animal behavior but also inform models of human decision-making.

The implications of the findings extend beyond the realm of animal studies and touch upon relevant issues in economics and behavioral sciences. The cognitive strategies employed by animals in response to conflicting information can provide a mirror into the decision-making processes of humans, particularly in contexts where competing desires or options exist. The research serves as a critical reminder of the intricate similarities between human and animal cognition, challenging the long-held belief that such complex decision-making is a uniquely human trait.

The work of Van Allsburg and Shahan is poised to influence the methodology of future research in the field of cognitive ethology. By employing rigorous experimental designs, their study opens the door for a multitude of follow-up inquiries exploring similar themes across different species. Understanding how various animals process conflicting information about rewards will likely yield new avenues for research, including investigations into the neurological underpinnings that inform such cognitive pathways.

In a broader context, this research can also serve as a grounding point for conservation efforts and animal welfare initiatives. By understanding the intricacies of decision-making processes in animals, conservationists and animal behaviorists can develop strategies that better cater to the needs of various species, particularly in the face of habitat loss and environmental changes. Recognizing the cognitive capacities of animals allows for a more empathetic and scientifically-informed approach to protecting wildlife.

The study provides a substantial contribution to the ongoing dialogue surrounding animal cognition and offers a comprehensive look at how cognitive processes may evolve in response to environmental pressures. The insight that decision-making strategies are subject to continuous evaluation based on external factors and prior experiences positions this research as a cornerstone for future advancements in the study of both animal and human cognition.

As we look ahead, the manifestations of these findings can potentially reshape the frameworks through which we understand intelligence, decision-making, and behavior across species. The interplay of reward, time, and environmental stimuli opens up a fascinating vista into the cognitive lives of animals, warranting more detailed exploration and study.

In conclusion, Van Allsburg and Shahan’s research underscores the complexity of animal cognition, illustrating how non-human species interpret and respond to conflicting information pertaining to rewards. This enlightening examination not only enriches the literature on animal behavior but also prompts a broader reflection on the connectedness of all life forms. It is a powerful reminder that the boundaries separating humans and animals are, in many ways, insubstantial when it comes to understanding decision-making processes.

As the field of animal cognition continues to evolve, studies like this one will undoubtedly inspire further research into the remarkable capabilities of non-human species, highlighting the profound connection between all creatures that share this planet.

Subject of Research: Animal Cognition; Decision-Making; Conflict Resolution in Reward Sources

Article Title: Further examining how animals weigh conflicting information about reward sources over time.

Article References:

Van Allsburg, J., Shahan, T.A. Further examining how animals weigh conflicting information about reward sources over time.
Anim Cogn 28, 74 (2025). https://doi.org/10.1007/s10071-025-01982-x

Image Credits: AI Generated

DOI: 10.1007/s10071-025-01982-x

Keywords: Animal Cognition, Decision-Making, Reward Processing, Cognitive Flexibility, Temporal Discounting.