Katarzyna Bobrowicz

The detour paradigm in animal cognition

In this paper, we review one of the oldest paradigms used in animal cognition: the detour paradigm. The paradigm presents the subject with a situation where a direct route to the goal is blocked and a detour must be made to reach it. Often being an ecologically valid and a versatile tool, the detour paradigm has been used to study diverse cognitive skills like insight, social learning, inhibitory control and route planning. Due to the relative ease of administrating detour tasks, the paradigm has lately been used in large-scale comparative studies in order to investigate the evolution of inhibitory control. Here we review the detour paradigm and some of its cognitive requirements, we identify various ecological and contextual factors that might affect detour performance, we also discuss developmental and neurological underpinnings of detour behaviors, and we suggest some methodological approaches to make species comparisons more robust.

Affective forecasting in an orangutan : predicting the hedonic outcome of novel juice mixes

Abstract Affective forecasting is an ability that allows the prediction of the hedonic outcome of never-before experienced situations, by mentally recombining elements of prior experiences into possible scenarios, and pre-experiencing what these might feel like. It has been hypothesised that this ability is uniquely human. For example, given prior experience with the ingredients, but in the absence of direct experience with the mixture, only humans are said to be able to predict that lemonade tastes better with sugar than without it. Non-human animals, on the other hand, are claimed to be confined to predicting—exclusively and inflexibly—the outcome of previously experienced situations. Relying on gustatory stimuli, we devised a non-verbal method for assessing affective forecasting and tested comparatively one Sumatran orangutan and ten human participants. Administered as binary choices, the test required the participants to mentally construct novel juice blends from familiar ingredients and to make hedonic predictions concerning the ensuing mixes. The orangutan’s performance was within the range of that shown by the humans. Both species made consistent choices that reflected independently measured taste preferences for the stimuli. Statistical models fitted to the data confirmed the predictive accuracy of such a relationship. The orangutan, just like humans, thus seems to have been able to make hedonic predictions concerning never-before experienced events.

Cats Parallel Great Apes and Corvids in Motor Self-Regulation – Not Brain but Material Size Matters

The inhibition of unproductive motor movements is regarded as a fundamental cognitive mechanism. Recently it has been shown that species with large absolute brain size or high numbers of pallial neurons, like great apes and corvids, show the highest performance on a task purportedly measuring this mechanism: the cylinder task. In this task the subject must detour a perpendicularly oriented transparent cylinder to reach a reward through a side opening, instead of directly reaching for it and bumping into the front, which is regarded as an inhibitory failure. Here we test domestic cats, for the first time, and show that they can reach the same levels as great apes and corvids on this task, despite having much smaller brains. We tested subjects with apparatuses that varied in size (cylinder length and diameter) and material (glass or plastic), and found that subjects performed best on the large cylinders. As numbers of successes decreased significantly when the cylinders were smaller, we conducted additionally two experiments to discern which properties (length of the transparent surface, goal distance from the surface, size of the side opening) affects performance. We conclude that sensorimotor requirements, which differ between species, may have large impact on the results in such seemingly simple and apparently comparable tests. However, we also conclude that cats have comparably high levels of motor self-regulation, despite the differences between tests.

Altered video task: a non-verbal measure of what-who-where recall in young children

ABSTRACT This report aims to introduce, test and discuss a new method of measuring episodic memory in participants with highly restricted verbal abilities. Although an elicited/deferred imitation paradigm has already proposed a successful method of measuring this capacity in infants as young as 6 months old [Bauer, Patricia J. 2006. “Constructing a Past in Infancy: A Neuro-Developmental Account.” Trends in Cognitive Sciences 10 (4): 175–181], it failed to include a measure of capacities crucial for episodic recall, that is: a sense of self, a sense of subjective time and autonoetic consciousness [Tulving, Endel. 2002. “Episodic Memory: From Mind to Brain.” Annual Reviews Psychology 53: 1–25]. We combined developmental and comparative approaches in the altered video task to allow for simultaneous measuring of episodic recall and autonoetic consciousness. Episodic recall was measured via presentation of non-modified and modified recordings of a personal past event after a 24-h delay. The 15-month-old infants were expected to watch the modified video significantly longer than the non-modified video, and so evince the differentiation between them. Alongside, the infants participated in a mirror-mark task (a standard measure of self-recognition) and in a real-time video task (a possible alternative for the mirror-mark task). Results for ‘what’ and ‘who’ were consistent with our expectations. All results, their implications and possible future directions are discussed.