Puppy power! Using social cognition research tasks to improve socialization practices for domestic dogs (Canis familiaris)

Tiffani J. Howell, Pauleen C. Bennett

Puppy power! Using social cognition research tasks to improve socialization practices for domestic dogs (Canis familiaris)

Journal of Veterinary Behavior: Clinical Applications and Research, Volume 6, Issue 3, May–June 2011, Pages 195–204

Abstract

Understanding the psychology of the domestic dog is a key element in both research and clinical applications for veterinary behaviorists. This article summarizes social cognitive skills observed in dogs in recent cognition studies. The tasks are grouped into the following 2 categories: those which facilitate eye contact between dogs and human beings, and social learning tasks. We also describe easy-to-implement experimental paradigms, previously used in cognitive tests for adult dogs, which we recommend adapting for use with puppies as young as 3 weeks of age. We highlight specific ways by which breeders may alter setup of these tasks to further generalize the social cognitive benefits for the puppies. Furthermore, studies of social development in puppies would enable researchers to explore whether encouragement of the skills examined have a positive effect on behavior as adults, and should thus be specifically incorporated into socialization practices by all breeders and new owners. Thus, the practical applications of this knowledge could include informing best practices for early age socialization by breeders, while puppies are still in the litter, and by new owners when they initially acquire a puppy. This could potentially increase the number of dogs that are well adjusted for human society and thus reduce the number surrendered to shelters. Finally, we discuss the ethical implications of working with puppies in particular and with companion animals generally; the positioning of veterinary clinicians and researchers between the scientific and lay worlds can improve understanding within the community of the benefits that minimally invasive companion animal research can provide.

Dog's gaze at its owner increases owner's urinary oxytocin during social interaction

Miho Nagasawa, Takefumi Kikusui, Tatsushi Onaka, Mitsuaki Ohta

Dog's gaze at its owner increases owner's urinary oxytocin during social interaction

Hormones and Behavior, Volume 55, Issue 3, March 2009, Pages 434–441

Abstract

Oxytocin (OT) has been shown to play an important role in social bonding in animals. However, it is unclear whether OT is related to inter-species social bonding. In this study, to examine the possibility that urinary OT concentrations of owners were increased by their “dog's gaze”, perhaps representing social attachment to their owners, we measured urinary OT concentrations of owners before and after interaction with their dogs. Dog owners interacted with their dogs as usual for 30 min (interaction experiment) or were instructed not to look at their dogs directly (control experiment). We observed the behaviors of owners and their dogs during the experiments, and measured OT concentrations by radioimmunoassay in urine samples from the owners collected just before and 20 min after interaction with their dogs. Using a cluster analysis, owners could be divided into two groups: one received a longer duration of gaze from their dogs and reported a higher degree of relationship with their dogs (LG); the other received a shorter duration of gaze and reported a lower degree of relationship (SG). Urinary OT was higher in LG than SG after usual interaction with their dogs, but not in the control experiment. In the interaction experiment, a high correlation was found in LG between the frequency of behavioral exchanges initiated by the dog's gaze and the increase in urinary OT. We conclude that interactions with dogs, especially those initiated by the dog's gaze, can increase the urinary OT concentrations of their owners as a manifestation of attachment behavior.

The case of the disappearing bone: Dogs’ understanding of the physical properties of objects

Kristina F. Pattison, Holly C. Miller, Rebecca Rayburn-Reeves, Thomas Zentall

The case of the disappearing bone: Dogs’ understanding of the physical properties of objects

Behavioural Processes, Volume 85, Issue 3, October 2010, Pages 278–282

Abstract

To assess dogs’ memory for an occluded object, a gaze duration procedure was used similar to one often used with nonverbal infants. A bone shaped dog biscuit was placed behind a solid screen that then rotated in the depth plane through an arc front to back. Dogs were shown either of the two test events. In one event (the possible event), the screen rotated until it reached the point at which it would have reached the bone and then stopped (about 120°); in the other event (the impossible event), the screen rotated through a full 180° arc, as though it had passed through the bone. The dogs looked significantly longer at the impossible event. To control for the differential time it took for the screen to move, for a control group, a bone was placed behind the screen and the screen was rotated either 60° or 120° (both possible events). No difference in looking time was found. To control for the movement of the screen through 120° or 180° when both were possible, for a second control group, the bone was placed to the side of the screen rather than behind the screen and the screen was moved 120° or 180°. Again, no significant difference in looking time was found. Results suggest that much like young children, dogs understand the physical properties of an occluded object. That is they appear to understand that an object (such as a screen) should not be able to pass through another object (such as dog bone).

A Simple Reason for a Big Difference: Wolves Do Not Look Back at Humans, but Dogs Do

Ádám Miklósi, Enikö Kubinyi, József Topál, Márta Gácsi, Zsófia Virányi, Vilmos Csányi

A Simple Reason for a Big Difference: Wolves Do Not Look Back at Humans, but Dogs Do

Current Biology, Volume 13, Issue 9, 29 April 2003, Pages 763–766

Abstract

The present investigations were undertaken to compare interspecific communicative abilities of dogs and wolves, which were socialized to humans at comparable levels. The first study demonstrated that socialized wolves were able to locate the place of hidden food indicated by the touching and, to some extent, pointing cues provided by the familiar human experimenter, but their performance remained inferior to that of dogs. In the second study, we have found that, after undergoing training to solve a simple manipulation task, dogs that are faced with an insoluble version of the same problem look/gaze at the human, while socialized wolves do not. Based on these observations, we suggest that the key difference between dog and wolf behavior is the dogs' ability to look at the human's face. Since looking behavior has an important function in initializing and maintaining communicative interaction in human communication systems, we suppose that by positive feedback processes (both evolutionary and ontogenetically) the readiness of dogs to look at the human face has lead to complex forms of dog-human communication that cannot be achieved in wolves even after extended socialization.

Male and female dogs respond differently to men and women

Deborah L. Wells, Peter G. Hepper

Male and female dogs respond differently to men and women

Applied Animal Behaviour Science, Volume 61, Issue 4, 28 January 1999, Pages 341–349

Abstract

The effect of canine and/or human gender on the response of the domestic dog towards humans has been little studied. This study investigated the reactions of male and female dogs housed in an animal rescue shelter towards the presence of men and women to determine how a dog's response towards a person was influenced by canine and human gender. The response of 30 dogs housed in the Ulster Society for the Prevention of Cruelty to Animals (USPCA) to each of six people (three men and three women), who stood individually for a period of 2 min at the front of the dog's cage, was observed. The amount of time that the dog spent at the front of the cage, barking, looking towards the human, wagging its tail, and engaged in activities of sitting, standing, moving, resting, was recorded. Canine gender exerted an influence on the amount of time that dogs spent looking towards the humans. Female dogs showed a greater decrease in the amount of time they spent looking towards the humans over the course of the testing than male dogs. Human gender had an effect on both dog barking, and eye orientation. Dogs showed a stronger decrease in their barking and their tendency to look towards the human whenever the subject was a woman than a man, suggesting that dogs may be more defensively-aggressive towards men than women. There was no interaction between canine and human gender on the dog's response towards the persons. This study indicated that both canine and human gender influence certain elements of a dog's response towards the presence of a human. The findings may have practical implications for the re-housing of dogs from rescue shelters.

Learning and owner–stranger effects on interspecific communication in domestic dogs (Canis familiaris)

Angel M. Elgier, Adriana Jakovcevic, Alba E. Mustaca, Mariana Bentosela

Learning and owner–stranger effects on interspecific communication in domestic dogs (Canis familiaris)

Behavioural Processes, Volume 81, Issue 1, May 2009, Pages 44–49

Abstract

Domestic dogs are very successful at following human cues like gazing or pointing to find hidden food in an object choice task. They solve this kind of situation at their first attempts and from early stages of their development and perform better than wolves. Most of the authors proposed that these abilities are a domestication product, and independent from learning processes. There are few systematic studies on the effects of learning on dogs’ communicative skills. We aim to evaluate the effect of extinction and reversal learning procedures on the use of the pointing gesture in an object choice task. The results showed that dogs stopped following the pointing cue in the extinction and that they learned to choose the not pointed container in the reversal learning. Results suggest that instrumental learning plays an important role in interspecific communication mechanisms between humans and dogs. In both experiments for half of the subjects the pointer was the owner and for the rest was a stranger. A differential effect was found: extinction was slower but reversal learning was faster when the owner gave the cue. This data indicates that the relationship of the dog with the person who emits the cue influences performance.

Effect of reinforcement, reinforcer omission and extinction on a communicative response in domestic dogs (Canis familiaris)

Mariana Bentosela, Gabriela Barrera, Adriana Jakovcevic, Angel M. Elgier, Alba E. Mustaca

Effect of reinforcement, reinforcer omission and extinction on a communicative response in domestic dogs (Canis familiaris)

Behavioural Processes, Volume 78, Issue 3, July 2008, Pages 464–469

Abstract

There is a controversy about the mechanisms involved in the interspecific communicative behaviour in domestic dogs. The main question is whether this behaviour is a result of instrumental learning or higher cognitive skills are required. The present investigations were undertaken to study the effect of learning processes upon the gaze towards the human's face as a communicative response. To such purpose, in Study 1, gaze response was subjected to three types of reinforcement schedules: differential reinforcement, reinforcer omission, and extinction in a situation of “asking for food”. Results showed a significant increase in gaze duration in the differential reinforcement phase and a significant decrease in both the omission and extinction phases. These changes were quite rapid, since they occurred only after three training trials in each phase. Furthermore, extinction resulted in animal behaviour changes, such as an increase in the distance from the experimenter, the back position and lying behaviour. This is the first systematic evaluation of the behavioural changes caused by reward withdrawal (frustration) in dogs. In Study 2, the gaze response was studied in a situation where dogs walked along with their owners/trainers. These results show that learning plays an important role in this communicative response. The possible implications of these results for service dogs are discussed.

Breed differences in dogs’ (Canis familiaris) gaze to the human face

Adriana Jakovcevic, Angel M. Elgier, Alba E. Mustaca, Mariana Bentosela

Breed differences in dogs’ (Canis familiaris) gaze to the human face

Behavioural Processes, Volume 84, Issue 2, June 2010, Pages 602–607

Abstract

Domestic dogs (Canis familiaris) have been submitted to a vast process of artificial selection and to date, there are hundreds of breeds that differ in their physical and behavioral features. In addition, dogs possess important skills to communicate with humans. Previous evidence indicates that those abilities are related to the domestication process and are modulated by instrumental learning processes. Very few studies, however, have evaluated breed differences in the use and learning of interspecific communicative responses. In Study 1 Retrievers, German Shepherds and Poodles were compared in the acquisition and extinction of their gaze toward the human face, in a conflict situation involving food within sight but out of reach. The groups did not differ in the acquisition of the response, but throughout the extinction phase Retrievers gazed to the human significantly more than the other groups. In Study 2, similar results were obtained in a test without any previous explicit training. These results suggest that these three major popular breeds differ in gazing to humans in a communicative situation.