Emotion, Pain, & Sentience

Changes in the anxiety-like and fearful behavior of shrimp following daily threatening experiences

Behavioral variation in animals is often influenced by experience. Previous studies have found that daily threatening experiences can enhance fear- and anxiety-like behaviors in some vertebrates. However, it is unclear whether the change in fear/anxiety behavior occurs in invertebrates. The...

Year Published: 2022Topics: Emotion, Pain, & SentienceAnimal Type: Crustacean, Invertebrate

Citation: Takahashi, K. 2022. Changes in the anxiety-like and fearful behavior of shrimp following daily threatening experiences. Animal Cognition 25(2), 319–327.

Insensitivity to reward shifts in zebrafish (Danio rerio) and implications for assessing affective states

Theory and empirical findings predict that individuals in a negative affective state are more sensitive to unexpected reward loss and less sensitive to unexpected reward gain compared to individuals in a neutral or positive affective state. We explore the use...

Year Published: 2020Topics: Emotion, Pain, & Sentience, Environmental EnrichmentAnimal Type: Fish, Zebrafish

Citation: Tan, S. L. T., Handasyde, K. A., Rault, J.-L. et al. 2020. Insensitivity to reward shifts in zebrafish (Danio rerio) and implications for assessing affective states. Animal Cognition 23(1), 87–100

Classification of multiple emotional states from facial expressions in head-fixed mice using a deep learning-based image analysis

Facial expressions are widely recognized as universal indicators of underlying internal states in most species of animals, thereby presenting as a non-invasive measure for assessing physical and mental conditions. Despite the advancement of artificial intelligence-assisted tools for automated analysis of...

Year Published: 2023Topics: Emotion, Pain, & Sentience, Welfare AssessmentAnimal Type: Mouse, Rodent

Citation: Tanaka, Y., Nakata, T., Hibino, H. et al. 2023. Classification of multiple emotional states from facial expressions in head-fixed mice using a deep learning-based image analysis. PLOS ONE 18(7), e0288930.

The glass is not yet half empty: Agitation but not Varroa treatment causes cognitive bias in honey bees

Honey bees (Apis mellifera) are prone to judge an ambiguous stimulus negatively if they had been agitated through shaking which simulates a predator attack. Such a cognitive bias has been suggested to reflect an internal emotional state analogous to humans...

Year Published: 2017Topics: Emotion, Pain, & Sentience, Husbandry & Management, Welfare AssessmentAnimal Type: Insect & Spider, Invertebrate

Citation: Schlüns, H., Welling, H., Federici, J. R. et al. 2017. The glass is not yet half empty: Agitation but not Varroa treatment causes cognitive bias in honey bees. Animal Cognition 20(2), 233–241.

Report of the 2022 RSPCA/UFAW Rodent Welfare Group Meeting

The RSPCA/UFAW Rodent Welfare Group has held a one-day meeting every autumn for the last 29 years, so that its members can discuss current welfare research, exchange views on welfare issues and share experiences of the implementation of the 3Rs...

Year Published: 2023Topics: Emotion, Pain, & Sentience, Environmental Enrichment, Euthanasia, HandlingAnimal Type: Mouse, Other Rodent, Rat, Rodent

Citation: Stevens, C., Hammonds, T., Hinchcliffe, J. et al. 2023. Report of the 2022 RSPCA/UFAW Rodent Welfare Group Meeting. Animal Technology and Welfare 22(2), 91–100.

Emotions on the loose: Emotional contagion and the role of oxytocin in pigs

We studied emotional contagion, a simple form of empathy, and the role of oxytocin herein in pigs. Two training pigs per pen (n = 16 pens) were subjected to a positive treatment (pairwise access to a large compartment filled with...

Year Published: 2015Topics: Emotion, Pain, & Sentience, Social Housing & CompanionshipAnimal Type: Pig

Citation: Reimert, I., Bolhuis, J. E., Kemp, B. et al. 2015. Emotions on the loose: Emotional contagion and the role of oxytocin in pigs. Animal Cognition 18(2), 517–532.

Effects of early and later life environmental enrichment and personality on attention bias in pigs (Sus scrofa domesticus)

We investigated effects of early and later life housing on attention bias, as an indicator of affective state, in pigs differing in coping style [reactive (LR) vs. proactive (HR)]. Pigs (n = 128) in barren or enriched housing from birth (B1 vs....

Year Published: 2019Topics: Emotion, Pain, & Sentience, Environmental EnrichmentAnimal Type: Pig

Citation: Luo, L., Reimert, I., de Haas, E. N. et al. 2019. Effects of early and later life environmental enrichment and personality on attention bias in pigs (Sus scrofa domesticus). Animal Cognition 22(6), 959–972.

Thinking chickens: A review of cognition, emotion, and behavior in the domestic chicken

Domestic chickens are members of an order, Aves, which has been the focus of a revolution in our understanding of neuroanatomical, cognitive, and social complexity. At least some birds are now known to be on par with many mammals in...

Year Published: 2017Topics: Emotion, Pain, & Sentience, PersonalityAnimal Type: Bird, Chicken

Citation: Marino, L. 2017. Thinking chickens: A review of cognition, emotion, and behavior in the domestic chicken. Animal Cognition 20(2), 127–147.

The psychology of cows

Domestic cows (Bos taurus) are consumed worldwide as beef and veal, kept as dairy product producers, employed as draft animals in labor, and are used for a long list of other products, including leather and manure. But despite global reliance...

Year Published: 2017Topics: Emotion, Pain, & Sentience, PersonalityAnimal Type: Cattle

Citation: Marino, L., Allen, K. 2017. The psychology of cows. Animal Behavior and Cognition 4(4), 474–498

Positive affect and learning: Exploring the “Eureka Effect” in dogs

Animals may experience positive affective states in response to their own achievements. We investigated emotional responses to problem-solving in dogs, separating these from reactions to rewards per se using a yoked control design. We also questioned whether the intensity of...

Year Published: 2014Topics: Animal Training, Emotion, Pain, & Sentience, Welfare AssessmentAnimal Type: Dog

Citation: McGowan, R. T. S., Rehn, T., Norling, Y. et al. 2014. Positive affect and learning: Exploring the “Eureka Effect” in dogs. Animal Cognition 17(3), 577–587.