An experimental study of behavioural coping strategies in free-ranging female Barbary macaques (Macaca sylvanus)

A fundamental goal of stress research is to understand how individuals cope with challenges. Studies on a range of vertebrate species suggest that three groups of behaviour-affiliative, aggressive and self-directed behaviours-serve as coping strategies. To date, experimental studies of coping behaviour have tended to be conducted in captive conditions; the limited number of studies in free-ranging or wild settings have been observational in nature. We investigated coping behaviours in free-ranging female Barbary macaques (Macaca sylvanus) at Trentham Monkey Forest, UK, using an experimental playback approach to quantify subjects' responses to mildly aversive threat-grunts. Compared to silent control trials, playbacks of threat-grunts increased aggressive behaviours and one of the two self-directed behaviours examined (self-scratching). No such differences were seen for self-grooming, or for any affiliative behaviour. Elevations in the rate of one measure of aggression, lunging, were positively related to an average measure of adrenocortical activity (median faecal glucocorticoid metabolite levels over the study period). Evidence from females in a variety of Old World monkey species, including Barbary macaques, indicates that affiliative behaviours have an important role in coping with stressful events in the medium to longer term. Our results suggest that, in the short term, female Barbary macaques may use aggressive rather than affiliative behaviours in response to mild stress. These findings highlight the importance of considering how coping mechanisms may vary over time after a stressor, and how coping mechanisms relate to adrenocortical activity. Playback approaches like ours provide a powerful, flexible tool to explore issues such as this in free-ranging and wild animal populations.     

Reasons for the attribution of intent in 7- and 9-year-old children

Seven- and 9-year-old children were presented with drawings which depicted two ambiguous action-outcome sequences and asked to make judgements about the intention of an actor towards another, and then to provide an explanation for the judgement. The design incorporated two levels of actor valence (nice, bad) with two types of outcome quality (good, bad). Judgements were influenced by both valence and outcome factors, but no age effect emerged. Content analysis of the explanations did reveal an age difference in reasoning about social judgements which was associated with the bad outcome. Nine-year-olds used more inference-based explanations which reflected a more objective appraisal of the incident. The explanations of the younger children tended to be dominated by the immediacy of the situation. The findings further highlighted the importance of consistency between actor valence and outcome information relative to the direction of the child's judgement. Inconsistency arising in the context of a bad outcome situation elicited more rigorous explanations from the 9-year-olds.     

Offender-Victim Relationships in Criminal Homicide Followed by Offender's Suicide,North Carolina, 1972–1977

ABSTRACT: An analysis of 90 cases of criminal homicide followed by suicide in North Carolina, 1972 to 1977. Homicidal victim-offender relationships were investigated in regard to age, sex, race and whether victim and offender were member of the same family, friends, acquaintances, or strangers. These results were compared with victim-offender relationships in 994 criminal homicide cases in North Carolina in which offenders did not commit suicide. Married white males over 30 years were much more involved in homicide-suicide than they were in homicide alone. In these homicide-suicide cases, the victim was usually the spouse. Except for marital status, characteristics of homicide offenders who killed themselves resembled those of suicide-only individuals much more than those of homicide-only offenders. In the homicide-suicide cases, the killing of someone in close relationship to the offender, often a wife, appeared to be part of the evolving process of suicide. This clearly has implications for intervention into marital strife and also for immediate treatment of homicide offenders who kill spouses and other family members.     

Repetitive exploration towards locations that no longer carry a target in patients with neglect

About 50% of neglect patients show ipsilesional target re-exploration on neglect tasks and in daily life. The present study examines whether omissions and revisitings are due to disengagement failure from visible stimuli on the ipsilesional side. Thirteen patients with neglect and nine healthy controls were tested with three versions of the Bells test on touch screen, i.e. a standard cancellation in which targets have to be marked, an erase cancellation in which targets have to be erased, and a condition in which all items (including distracters) have to be erased. Whereas omissions decreased in the full-erase condition, revisitings were the most prominent in this condition. Our study shows that neglect patients also return to previously visited locations which no longer carry a target.