External stimulus control of target-directed attack and biting elicited by tailshock

Two experiments evaluating the effects of external stimuli on attack and biting in rats elicited by electric tailshock are reported. In the first experiment, stimuli presented to four groups of test subjects consisted of a stimulus animal, a stimulus animal plus taped vocalizations of a rat experiencing shock, an inanimate object, and an inanimate object plus taped vocalizations. Subjects in a fifth (control) group were tested in the absence of these stimuli. The presence of another animal in the test situation significantly increased the amount of target-directed responding. A decrease in responding, rather than increase, was shown by the subjects tested under the stimulus-object plus taped-vocalization conditions. Experiment 2 investigated the salient features of the stimulus animal and found a combination of both olfactory and visual cues to be most effective in eliciting target-directed responding. These studies indicate that the amount of target-directed attack and biting shown in this situation may be related causally to the type of sensory input received by the test animal.     

Victim, perpetrator, family, and incident characteristics of infant and child homicide in the United States Air Force

OBJECTIVE: The present study describes factors related to fatal abuse in three age groups in the United States Air Force (USAF). METHOD: Records from 32 substantiated cases of fatal child abuse in the USAF were independently reviewed for 60 predefined factors. RESULTS: Males were over-represented in young child victims (between 1 year and 4 years of age) and child victims (between 4 years and 15 years of age) but not in infant victims (between 24 hours and 1 year of age). African-American infant victims and perpetrators were over-represented. Younger victims were more likely to have been previously physically abused by the perpetrator. Perpetrators were predominantly male and the biological fathers of the victims. Infant and young child perpetrators reported childhood abuse histories, while child perpetrators reported the highest frequency of mental health contact. Victims' families reported significant life stressors. Families of young child victims were more likely divorced, separated, or single. Incidents with infants and young children tended to occur without witnesses; incidents with child victims tended to have the victim's sibling(s) and/or mother present. Fatal incidents were more frequent on the weekend, in the home, and initiated by some family disturbance. CONCLUSIONS: Differences among groups in factors related to infant and child homicide across age groups may assist in the development of more tailored abuse prevention efforts and may also guide future investigations.     

An Integrative View of School Functioning: Transactions Between Self‐Regulation,School Engagement,and Teacher–Child Relationship Quality

This study investigates the dynamic interplay between teacher–child relationship quality and children's behaviors across kindergarten and first grade to predict academic competence in first grade. Using a sample of 338 ethnically diverse 5‐year‐old children, nested path analytic models were conducted to examine bidirectional pathways between children's behaviors and teacher–child relationship quality. Low self‐regulation in kindergarten fall, as indexed by inattention and impulsive behaviors, predicted more conflict with teachers in kindergarten spring and this effect persisted into first grade. Conflict and low self‐regulation jointly predicted decreases in school engagement which in turn predicted first‐grade academic competence. Findings illustrate the importance of considering transactions between self‐regulation, teacher–child relationship quality, and school engagement in predicting academic competence.