Peter G Judge
Biographic Data
| ID | 4496907 |
|---|---|
| NAME | Peter G Judge |
| GIVEN NAMES | Peter G |
| FAMILY NAME | Judge |
| SIGNATURE | JUDGE P G |
| AFFILIATIONS | Emory University |
| ORCID | 0000-0002-6596-0040 |
| VERIFIED | Yes |
| TOTAL WORKS | 16 |
| TOTAL CITATIONS | 1 |
| WORKS AS AUTHOR | 16 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1981 |
| LATEST PUBLICATION YEAR | 2024 |
| H-INDEX | 1 |
In memory of our mentor
The world lost a towering figure when primatologist Frans de Waal passed away on March 14, 2024. Many are aware of his multitude of contributions to the field. His ability to see what animals were actually doing changed how we viewed first primates, then other species. He shared these insights through both traditional scientific outputs, such as journal articles and scientific presentations, and less common outputs, such as 15 books and two TED t…
Use of social network models to understand play partner choice strategies in three primate species
Crowding increases salivary cortisol but not self‐directed behavior in captive baboons
Reduced space can lead to crowding in social animals. Crowding increases the risk of agonistic interactions that, in turn, may require additional physiological defensive coping mechanisms affecting health. To determine the stress induced from increased social density in a group of nineteen baboons living in an indoor/outdoor enclosure, saliva cortisol levels and rates of anxiety-related behavior were analyzed across two unique crowding episodes. …
Transport of Functionally Appropriate Tools by Capuchin Monkeys ( Cebus apella )
Capuchin monkeys ( Cebus sp.) are notable among New World monkeys for their widespread use of tools. Like chimpanzees, they use both hammer tools and insertion tools in the wild to acquire food that would be unobtainable otherwise. Recent evidence indicates that capuchins transport stones to anvil sites and use the most functionally efficient stones to crack nuts. We further investigated capuchins’ assessment of functionality by testing their abi…
Effectiveness of saliva collection and enzyme‐immunoassay for the quantification of cortisol in socially housed baboons
Circulating cortisol levels are often used to assess the biological stress response in captive primates. Some methods commonly used to collect blood samples may alter the stress response. As such, noninvasive means to analyze cortisol levels are increasingly being developed. We adapted an existing collection method to simultaneously obtain saliva from multiple socially living hamadryas baboons ( Papio hamadryas hamadryas ) and validated an enzyme…
Conflict management by hamadryas baboons (Papio hamadryas hamadryas) during crowding
Primates change a variety of behavioral responses during short-term exposure to crowding. Under crowded conditions, rates of aggression, submissive behavior, and affiliative behavior may increase or decrease. Different patterns of change among these three categories of response have been interpreted as various coping "strategies" for managing the increased risk of conflict under crowded conditions. Grooming is of particular interest because this …
Primate Psychology
Program and Conference Schedule
Influence of kinship and spatial density on reconciliation and grooming in rhesus monkeys
Some cercopithecine primates direct disproportionate amounts of grooming, huddling, and agonistic support toward maternal kin. Disproportionate amounts of aggression are also directed toward maternal kin, however, suggesting that mechanisms that restore relationships damaged by aggression, such as reconciliation, might be biased toward these preferred social partners. Studies investigating kinship effects and reconciliation are inconsistent, howe…
Kinship, association, and social relationships in rhesus monkeys ( Macaca mulatta )
Data on social interactions with matrilineal kin were collected from two groups of rhesus monkeys for 6 years. All behavioral states, including time within one meter of another, involved kin more often than would be expected by chance. Significant associations were also found between kinship and the frequencies of various forms of agonistic as well as affiliative acts. Frequency of social interaction, however, was not a simple function of time in…
Sex differences in adolescent rhesus monkey ( Macaca mulatta ) Behavior
Sex differences in the behavior of 2.5‐ to 4.5‐year‐old rhesus monkeys, living in two social groups approximating natural compositions, were studied over a period of 3 years. Both sexes interacted significantly more often with members of their own sex in agonistic and affiliative interactions even when total rates and durations for male and female subjects did not differ. Strong sexual segregation was also seen in proximity, nonspecific contact, …
Testosterone changes during the period of adolescence in male rhesus monkeys ( Macaca mulatta )
Testosterone levels of 59 male rhesus monkeys were monitored over a period of 5 years. Longitudinal comparisons revealed consistent rises in mid‐morning levels of circulating hormone in successive years from age 2.5 to 6.5 years of age, whereas cross‐sectional comparisons failed to detect significant differences among the older subjects. The first mid‐morning hormonal elevation could be detected in some males as young as 2.5 years of age, whereas…
Dyadic and triadic reconciliation in pigtail macaques ( Macaca nemestrina )
The tendency in primates for former antagonists to approach and affiliate following aggression has been termed reconciliation because the response is thought to resolve social conflicts produced by aggression. In primate societies, however, an aggressive interaction between two individuals often spreads to include other group members, especially the kin of the combatants. If post conflict affiliation resolves aggressive conflicts in a group, then…
Observational measures of auditory sensitivity in early infancy
A rigorous observational procedure is described for estimating the detectability of auditory signals in the first few months of life. This procedure, a modification of the observer-based psychoacoustic procedure, generates a bias-free estimate of auditory sensitivity and avoids some of the potential problems associated with alternative techniques
Seasonal weight changes in male rhesus monkeys ( Macaca mulatta )
Adult male rhesus monkeys lose weight during the breeding season and regain it during the nonbreeding season. The annual pattern of maximum weight gain just prior to the onset of breeding resembles the seasonal “fattening” seen in squirrel monkeys, but the period of weight gain is less discrete. The magnitude of weight change is less in younger males, in that sexually immature males gain weight in both seasons, but significantly less during the b…
The dynamics of social organization in a population of squirrel monkeys (Saimiri sciureus) in a seminatural environment
Observational measures of auditory sensitivity in early infancy
A rigorous observational procedure is described for estimating the detectability of auditory signals in the first few months of life. This procedure, a modification of the observer-based psychoacoustic procedure, generates a bias-free estimate of auditory sensitivity and avoids some of the potential problems associated with alternative techniques
The dynamics of social organization in a population of squirrel monkeys (Saimiri sciureus) in a seminatural environment
Seasonal weight changes in male rhesus monkeys ( Macaca mulatta )
Adult male rhesus monkeys lose weight during the breeding season and regain it during the nonbreeding season. The annual pattern of maximum weight gain just prior to the onset of breeding resembles the seasonal “fattening” seen in squirrel monkeys, but the period of weight gain is less discrete. The magnitude of weight change is less in younger males, in that sexually immature males gain weight in both seasons, but significantly less during the b…
Testosterone changes during the period of adolescence in male rhesus monkeys ( Macaca mulatta )
Testosterone levels of 59 male rhesus monkeys were monitored over a period of 5 years. Longitudinal comparisons revealed consistent rises in mid‐morning levels of circulating hormone in successive years from age 2.5 to 6.5 years of age, whereas cross‐sectional comparisons failed to detect significant differences among the older subjects. The first mid‐morning hormonal elevation could be detected in some males as young as 2.5 years of age, whereas…
Dyadic and triadic reconciliation in pigtail macaques ( Macaca nemestrina )
The tendency in primates for former antagonists to approach and affiliate following aggression has been termed reconciliation because the response is thought to resolve social conflicts produced by aggression. In primate societies, however, an aggressive interaction between two individuals often spreads to include other group members, especially the kin of the combatants. If post conflict affiliation resolves aggressive conflicts in a group, then…
Observational measures of auditory sensitivity in early infancy
A rigorous observational procedure is described for estimating the detectability of auditory signals in the first few months of life. This procedure, a modification of the observer-based psychoacoustic procedure, generates a bias-free estimate of auditory sensitivity and avoids some of the potential problems associated with alternative techniques
Kinship, association, and social relationships in rhesus monkeys ( Macaca mulatta )
Data on social interactions with matrilineal kin were collected from two groups of rhesus monkeys for 6 years. All behavioral states, including time within one meter of another, involved kin more often than would be expected by chance. Significant associations were also found between kinship and the frequencies of various forms of agonistic as well as affiliative acts. Frequency of social interaction, however, was not a simple function of time in…
Sex differences in adolescent rhesus monkey ( Macaca mulatta ) Behavior
Sex differences in the behavior of 2.5‐ to 4.5‐year‐old rhesus monkeys, living in two social groups approximating natural compositions, were studied over a period of 3 years. Both sexes interacted significantly more often with members of their own sex in agonistic and affiliative interactions even when total rates and durations for male and female subjects did not differ. Strong sexual segregation was also seen in proximity, nonspecific contact, …
Influence of kinship and spatial density on reconciliation and grooming in rhesus monkeys
Some cercopithecine primates direct disproportionate amounts of grooming, huddling, and agonistic support toward maternal kin. Disproportionate amounts of aggression are also directed toward maternal kin, however, suggesting that mechanisms that restore relationships damaged by aggression, such as reconciliation, might be biased toward these preferred social partners. Studies investigating kinship effects and reconciliation are inconsistent, howe…
Program and Conference Schedule
Primate Psychology
Conflict management by hamadryas baboons (Papio hamadryas hamadryas) during crowding
Primates change a variety of behavioral responses during short-term exposure to crowding. Under crowded conditions, rates of aggression, submissive behavior, and affiliative behavior may increase or decrease. Different patterns of change among these three categories of response have been interpreted as various coping "strategies" for managing the increased risk of conflict under crowded conditions. Grooming is of particular interest because this …
Effectiveness of saliva collection and enzyme‐immunoassay for the quantification of cortisol in socially housed baboons
Circulating cortisol levels are often used to assess the biological stress response in captive primates. Some methods commonly used to collect blood samples may alter the stress response. As such, noninvasive means to analyze cortisol levels are increasingly being developed. We adapted an existing collection method to simultaneously obtain saliva from multiple socially living hamadryas baboons ( Papio hamadryas hamadryas ) and validated an enzyme…
Transport of Functionally Appropriate Tools by Capuchin Monkeys ( Cebus apella )
Capuchin monkeys ( Cebus sp.) are notable among New World monkeys for their widespread use of tools. Like chimpanzees, they use both hammer tools and insertion tools in the wild to acquire food that would be unobtainable otherwise. Recent evidence indicates that capuchins transport stones to anvil sites and use the most functionally efficient stones to crack nuts. We further investigated capuchins’ assessment of functionality by testing their abi…
Crowding increases salivary cortisol but not self‐directed behavior in captive baboons
Reduced space can lead to crowding in social animals. Crowding increases the risk of agonistic interactions that, in turn, may require additional physiological defensive coping mechanisms affecting health. To determine the stress induced from increased social density in a group of nineteen baboons living in an indoor/outdoor enclosure, saliva cortisol levels and rates of anxiety-related behavior were analyzed across two unique crowding episodes. …
Use of social network models to understand play partner choice strategies in three primate species
In memory of our mentor
The world lost a towering figure when primatologist Frans de Waal passed away on March 14, 2024. Many are aware of his multitude of contributions to the field. His ability to see what animals were actually doing changed how we viewed first primates, then other species. He shared these insights through both traditional scientific outputs, such as journal articles and scientific presentations, and less common outputs, such as 15 books and two TED t…
Primate Behavior and Ecology (12 works) · Psychology (12 works) · Biology (9 works) · Developmental psychology (8 works) · Animal Behavior and Reproduction (7 works) · Animal Vocal Communication and Behavior (6 works) · Social Psychology (6 works) · Aggression (5 works) · Sociology (5 works) · Demography (4 works)