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Biomedical subjects

J S Milner

Publications and source records attributed to J S Milner.

At least 19 recordsLinked to original sources
PubMed2001

Childhood physical abuse, early social support, and risk for maltreatment: current social support as a mediator of risk for child physical abuse.

OBJECTIVE: The study investigated whether perceptions of social support in adulthood partially mediated the associations between childhood experiences (i.e., receipt of physical abuse and levels of early social support) and adult risk for child physical abuse. METHOD: Participants included 598 general population adults who completed self-report measures designed to assess childhood physical abuse, perceptions of early and current social support, and risk factors for child physical abuse. Structural equation modeling was used to test and cross validate a model that included the direct effects of child physical abuse and early social support on child physical abuse risk, as well as mediated effects through an influence on adult perceptions of social support. RESULTS: Childhood physical abuse and early social support covaried, such that receipt of physical abuse was associated with lower levels of perceived early social support. Early support, but not child physical abuse, had an indirect effect (i.e., through current support) on child physical abuse risk. More specifically, levels of early support were directly related to adult perceptions of support, and adult perceptions of support were inversely associated with child physical abuse risk. Childhood physical abuse was directly related to child physical abuse risk. CONCLUSIONS: Low levels of early support may impact risk for child physical abuse by affecting perceptions of others as supportive in adulthood. The receipt of physical abuse in childhood, however, does not appear to impact perceptions of support in adulthood. Research is needed to identify additional factors that may explain the association between receipt of physical abuse in childhood and increased risk of child physical abuse in adulthood.

Adolescent↗
PubMed2001

Evaluations, attributions, affect, and disciplinary choices in mothers at high and low risk for child physical abuse.

OBJECTIVE: The present study investigated several components of a social information-processing model of child physical abuse. The main objective was to examine the extent to which high-risk, relative to low-risk, mothers differed in their evaluations, attributions, negative affect, and disciplinary choices for children's behavior, and to explore whether these differences may be expressed in interactions between risk status and mitigating information. METHOD: Nineteen high- and 19 matched low-risk mothers' evaluations of children transgressions, attributions, affect, and choices of disciplinary techniques were examined using six vignettes depicting a child engaging in moral, conventional, and personal transgressions. One-half of the vignettes contained mitigating information and one-half did not. High- and low-risk mothers were chosen based on their potential for physical child abuse. A three-factor (2 x 3 x 2) design was used to assess the dependent variables. RESULTS: As expected, high-risk, relative to low-risk, mothers reported more hostile intent, stable and global attributions, aversiveness, annoyance, and use of power-assertion discipline. A risk group by type of transgression interaction was found for evaluation and indifference and a risk group by mitigating information interaction was found for evaluation of wrongness, internal attributions, and aversiveness. A risk by type of transgression by mitigating information interaction was found for global/specific attributions, aversiveness, and indifference toward child transgressions. CONCLUSIONS: Results support a social information processing model of child physical abuse, which suggests that high-risk, compared to low-risk, mothers process child-related information differently and use more power-assertive disciplinary techniques.

Analysis of Variance↗
PubMed2001

Childhood abuse and premilitary sexual assault in male Navy recruits.

Three samples of male U.S. Navy recruits (N = 7,850) were surveyed to determine whether a history of childhood physical abuse (CPA) or childhood sexual abuse (CSA) was predictive of premilitary rape of women and whether these relationships were mediated by alcohol problems and number of sex partners. In the 3 samples, 11.3%, 11.6%, and 9.9% of men reported committing premilitary rape. When demographic factors were controlled for, both CPA and CSA were independently and additively predictive of rape in each sample, with men who experienced both forms of abuse showing the highest risk of committing rape. Additional analyses revealed that alcohol problems and number of sex partners significantly mediated the relationship between childhood abuse (CPA and CSA) and rape perpetration.

Adolescent↗
PubMed2001

Predicting the impact of child sexual abuse on women: the role of abuse severity, parental support, and coping strategies.

Female Navy recruits (N = 5,226) completed surveys assessing history of childhood sexual abuse (CSA), childhood strategies for coping with CSA, childhood parental support, and current psychological adjustment. Both CSA and parental support independently predicted later adjustment. In analyses examining whether CSA victims' functioning was associated with CSA severity (indexed by 5 variables), parental support (indexed by 3 variables), and coping (constructive, self-destructive, and avoidant), the negative coping variables were the strongest predictors. A structural equation model revealed that the effect of abuse severity on later functioning was partially mediated by coping strategies. However. contrary to predictions, the model revealed that childhood parental support had little direct or indirect impact on adult adjustment.

Adaptation, Psychological↗
PubMed2000

Impact of child noncompliance on stress appraisals, attributions, and disciplinary choices in mothers at high and low risk for child physical abuse.

OBJECTIVE: The study investigated the impact of repeated child noncompliance on stress appraisals, attributions, and disciplinary choices in high- and low-risk mothers. METHOD: Fifty (25 high-risk and 25 demographically, matched low-risk) mothers responded to questions related to stress appraisals, attributions, and disciplinary choices following presentations of a child engaging in repeated noncompliance. RESULTS: After repeated child noncompliance, high-risk, compared to low-risk, mothers perceived more threat and uncontrollability, rated child behaviors as more stressful, and reported higher levels of negative affect. High-risk mothers also reported more stable, global, and intentional attributions, with a trend toward more internal attributions, but did not differ in their evaluations of wrongness and seriousness of the child's behavior. After repeated noncompliance, a risk group difference was found in estimates of future child compliance but not in the use of power assertive discipline. CONCLUSIONS: Results support the view that high-risk, relative to low-risk, mothers are differentially responsive to stressful situations and differ in their attributions for negative child behaviors and in their expectations of future child compliance. However, since risk group differences in disciplinary choices were not also found, additional research is needed to demonstrate the process through which risk group cognitive and affective differences are related to differences in disciplinary behavior.

Adult↗
PubMed2000

Evaluations of child transgressions, disciplinary choices, and expected child compliance in a no-cry and a crying infant condition in physically abusive and comparison mothers.

OBJECTIVE: Several components of a social information processing model of child physical abuse were tested. Abusive and comparison mothers' evaluations of children's transgressions, choices of disciplinary techniques, expectations for children's compliance following discipline, and appraisals of the appropriateness of disciplinary choice were examined in a no-cry and a crying-infant condition. METHOD: Thirty physically abusive and 30 matched comparison mothers were individually matched on ethnic background, age, education, marital status, number of children, and cognitive ability. Mothers were asked to respond to questions related to vignettes describing children engaging in moral, conventional, and personal transgressions. RESULTS: As predicted, abusive, relative to comparison, mothers evaluated conventional and personal, but not moral, transgressions as more wrong, used more power assertion (physical and verbal force), expected less compliance from their own children, and appraised their own disciplinary responses as less appropriate. In contrast to expectations, there were no group by cry condition interaction effects on any of the study measures. CONCLUSIONS: The findings provide additional support for the view that abusive, relative to comparison, mothers are different in their evaluations and expectations of their own children's behaviors and that they more frequently select aversive disciplinary techniques. However, given the lack of an expected differential impact of a stressful condition on the cognitions and disciplinary choices in abusive mothers, additional research is needed.

Adult↗
PubMed2000

Emotion recognition ability in mothers at high and low risk for child physical abuse.

OBJECTIVE: The study sought to determine if high-risk, compared to low-risk, mothers make more emotion recognition errors when they attempt to recognize emotions in children and adults. METHOD: Thirty-two demographically matched high-risk (n = 16) and low-risk (n = 16) mothers were asked to identify different emotions expressed by children and adults. Sets of high- and low-intensity, visual and auditory emotions were presented. Mothers also completed measures of stress, depression, and ego-strength. RESULTS: High-risk, compared to low-risk, mothers showed a tendency to make more errors on the visual and auditory emotion recognition tasks, with a trend toward more errors on the low-intensity, visual stimuli. However, the observed trends were not significant. Only a post-hoc test of error rates across all stimuli indicated that high-risk, compared to low-risk, mothers made significantly more emotion recognition errors. Although situational stress differences were not found, high-risk mothers reported significantly higher levels of general parenting stress and depression and lower levels of ego-strength. CONCLUSIONS: Since only trends and a significant post hoc finding of more overall emotion recognition errors in high-risk mothers were observed, additional research is needed to determine if high-risk mothers have emotion recognition deficits that may impact parent-child interactions. As in prior research, the study found that high-risk mothers reported more parenting stress and depression and less ego-strength.

Adolescent↗
PubMed2000

Rapid three-dimensional segmentation of the carotid bifurcation from serial MR images.

The current trend in computational hemodynamics is to employ realistic models derived from ex vivo or in vivo imaging. Such studies typically produce a series of images from which the lumen boundaries must first be individually extracted (i.e., two-dimensional segmentation), and then serially reconstructed to produce the three-dimensional lumen surface geometry. In this paper, we present a rapid three-dimensional segmentation technique that combines these two steps, based on the idea of an expanding virtual balloon. This three-dimensional technique is demonstrated in application to finite element meshing and CFD modeling of flow in the carotid bifurcation of a normal volunteer imaged with black blood MRI. Wall shear stress patterns computed using a mesh generated with the three-dimensional technique agree well with those computed using a mesh generated from conventional two-dimensional segmentation and serial reconstruction. In addition to reducing the time required to extract the lumen surface from hours to minutes, our approach is easy to learn and use and requires minimal user intervention, which can potentially increase the accuracy and precision of quantitative and longitudinal studies of hemodynamics and vascular disease.

Carotid Arteries↗
PubMed1999

Childhood abuse and sexual revictimization in a female Navy recruit sample.

To examine effects of childhood abuse on adult rape, 1,887 female Navy recruits were surveyed. Overall 35% of recruits had been raped and 57% had experienced childhood physical abuse (CPA) and/or childhood sexual abuse (CSA). Controlling for CPA, rape was significantly (4.8 times) more likely among women who had experienced CSA than among women who had not. In contrast, CPA (controlling for CSA) was unrelated to likelihood of adult rape. Alcohol problems and number of sex partners were examined as mediators. Although both variables predicted rape, their effects were independent of the effects of CSA. Finally, despite ethnic group differences in the prevalence of victimization, the predictors of rape did not differ significantly across ethnic groups.

Adult↗
PubMed1998

Neuropsychological functioning: comparison of mothers at high- and low-risk for child physical abuse.

OBJECTIVE: The present study investigated the performance of high- and low-risk (for child physical abuse) mothers on cognitive measures in a cry (crying infant) and no-cry condition. The degree to which observed risk group differences in cognitive abilities were due to group differences in depression and/or anxiety was explored. METHOD: Forty mothers, 20 high-risk and 20 demographically matched low-risk mothers, participated in the study. All mothers completed neuropsychological measures of conceptual ability, cognitive flexibility, ability to adjust responses, verbal fluency, attention, and susceptibility of interference, and measures of intellectual functioning, depression, and anxiety. RESULTS: Although initial analyses indicated expected risk group differences on most of the neuropsychological measures, a second set of analyses, that controlled for group differences in IQ, revealed risk group differences only on measures of conceptual ability, cognitive flexibility, and problem-solving skills. In a third set of analyses that controlled for group differences in IQ, depression, and anxiety, no risk group differences on any of the neuropsychological measures were found. In each analysis, expected interactions between risk group and cry condition were not found. CONCLUSIONS: The findings support clinical reports of cognitive differences in abusive and nonabusive mothers, but indicate that clinically observed cognitive deficits in high-risk and abusive mothers may be associated with lower levels of intellectual ability and with higher levels of depression and anxiety that are commonly reported in high-risk and abusive mothers.

Adult↗
PubMed1998

Gender differences in physiological reactivity to infant cries and smiles in military families.

OBJECTIVE: The primary purpose of this experiment was to examine gender differences in physiological reactivity to infant cries and smiles in military families. METHOD: Twenty males and 29 females viewed and listened to videotapes of a crying infant and a smiling infant while heart rate, skin resistance, and respiration rate were monitored. All participants were active-duty U.S. Air Force personnel or their spouses. RESULTS: Males showed a larger increase in skin conductance than females during the crying infant stimulus. Males also showed an increase in heart rate during the crying infant stimulus, whereas females did not show any increase in heart rate during the crying infant stimulus. No gender differences in physiological reactivity were obtained during the smiling infant stimulus, although both males and females showed a significant increase in heart rate while viewing the smiling infant. CONCLUSIONS: The results are contrasted with previous reports (e.g., Frodi, Lamb, Leavitt, & Donovan, 1978) of no differences between genders in physiological reactivity to a crying infant. Discussion of the results focuses on models of child physical abuse that involve physiological hyperreactivity. It is hypothesized that the greater physiological reactivity of males than females during a crying infant videotape may partially explain why physical abuse of a child by a male frequently results in more serious damage to the child than physical abuse by a female.

Adult↗
PubMed1998

Hemodynamics of human carotid artery bifurcations: computational studies with models reconstructed from magnetic resonance imaging of normal subjects.

PURPOSE: The precise role played by hemodynamics, particularly wall shear stress, in the development and progression of vascular disease remains unclear, in large part because of a lack of in vivo studies with humans. Although technical challenges remain for noninvasively imaging wall shear stresses in humans, vascular anatomy can be imaged with sufficiently high resolution to allow reconstruction of three-dimensional models for computational hemodynamic studies. In this paper we present an entirely noninvasive magnetic resonance imaging (MRI) protocol that provides carotid bifurcation geometry and flow rates from which the in vivo hemodynamics can be computed. Maps of average, oscillatory, and gradients of wall shear stress are presented for two normal human subjects, and their data are compared with those computed for an idealized carotid bifurcation model. METHODS: An MRI protocol was developed to acquire all necessary image data in scan times suitable for patient studies. Three-dimensional models of the carotid bifurcation lumen were reconstructed from serial black blood MR images of two normal volunteers. Common and internal carotid artery flow rate waveforms were determined from MRI phase-contrast velocity imaging in the same subjects and were used to impose fully developed velocity boundary conditions for the computational model. Subject-specific time-resolved velocities and wall shear stresses were then computed with a finite element-based Navier-Stokes equation solver. RESULTS: Models reconstructed from in vivo MRI of two subjects showed obvious differences in branch angle, bulb size and extent, and three-dimensional curvature. Maps of a variety of wall shear stress indices showed obvious qualitative differences in patterns between the in vivo models and between the in vivo models and the idealized model. Secondary, helical flow patterns, induced primarily by the asymmetric and curved in vivo geometries, were found to play a key role in determining the resulting wall shear stress patterns. The use of in vivo flow rate waveforms was found to play a minor but noticeable role in some of the wall shear stress behavior observed. CONCLUSIONS: Conventional "averaged" carotid bifurcation models mask interesting hemodynamic features observed in realistic models derived from noninvasive imaging of normal human subjects. Observation of intersubject variations in the in vivo wall shear stress patterns supports the notion that more conclusive evidence regarding the role of hemodynamics in vascular disease may be derived from such individual studies. The techniques presented here, when combined with subject-specific MRI measurements of carotid artery plaque thickness and composition, provide the tools necessary for entirely noninvasive, prospective, in vivo human studies of hemodynamics and the relationship of hemodynamics to vascular disease.

Adult↗
PubMed1998

Prevalence of premilitary adult sexual victimization and aggression in a Navy recruit sample.

U.S. Navy recruits (n = 3,776) were surveyed for premilitary histories of adult sexual assault. They completed a survey designed to estimate rates for experiences as victims (women) and perpetrators (men) of attempted and completed rape since the age of 14. The results show that 45.5% of the women reported being the victim of attempted (9.4%) or completed rape (36.1%) before entering the Navy. Male recruits' self-reports indicated that 14.8% admitted perpetrating attempted (3.5%) or completed rape (11.3%) before entering the Navy. A high percentage of recruits in this study reported histories of sexual assault. Female victims of sexual assault are at high risk of incurring somatic and/or psychological problems that require treatment by health care professionals. Male perpetrators of sexual assault are at high risk of repeating their behavior. The results of this study suggest that it may be cost-effective to develop treatment education, and prevention programs for military recruits.

Adolescent↗
PubMed1997

Mother-child interactional patterns in high- and low-risk mothers.

OBJECTIVE: The aim of the present study was to determine the extent to which mother-child interactional patterns in high- and low-risk (for child physical abuse) mothers were similar to patterns observed in physically abusive parents. METHOD: Ten high-risk and 10 demographically similar low-risk mother-child dyads were studied. Trained observers coded maternal-child interaction patterns in the home during five 1-hour periods using the Standardized Observation Codes system. RESULTS: As expected, high-risk mothers made fewer neutral approaches to their children, displayed more negative behaviors toward their children, and made more indiscriminant responses to their children's prosocial behavior. Expected risk group differences were not found in the number of neutral instructions or positive responses, albeit the proportion of positive responses out of the total number of positive and negative responses was higher for low-risk mothers. After control for educational differences, risk group differences remained in the rates of neutral approaches and the number of indiscriminant behaviors made in response to children's prosocial behaviors. CONCLUSIONS: The observational data indicated that high-risk mothers display some behaviors similar to those observed in physically abusive mothers. The finding that high-risk mothers made more indiscriminate or noncontingent responses when reacting to their children's prosocial behavior is consistent with a coercive model of child physical abuse.

Adult↗
PubMed1997

Impact and detection of response distortions on parenting measures used to assess risk for child physical abuse.

This study investigates the impact of instructional conditions (fake good, be honest, fake bad, and respond randomly) on the scores of 3 parenting measures: the Adult/Adolescent Parenting Inventory (AAPI; Bavolek, 1984), the Child Abuse Potential (CAP) Inventory (Milner, 1986), and the Parenting Stress Index (PSI; Abidin, 1995) in general-population parents and at-risk parents. In addition, the study explores the ability of the PSI Defensiveness Scale and the CAP Inventory validity indexes to detect response distortions. As expected, most parenting-measure scores changed significantly as a result of parents' attempts to distort their responses. Across the response-distortion conditions, the PSI Defensiveness Scale only detected protocols in the fake-good condition with detection rates below 50%, whereas the CAP Inventory validity indexes correctly detected as invalid 94.7% and 91.1% of the protocols generated by general-population parents and at-risk parents, respectively. With regard to correct detection and labeling rates, except for the labeling of faking-bad behavior in the at-risk group (57.9% correct), the labeling rates of the CAP validity indexes for each of the response-distortion conditions in the general population and at-risk groups were acceptable, ranging from 82.4% to 100% correct.

Adult↗
PubMed1996

Childhood parenting experiences, intimate partner conflict resolution, and adult risk for child physical abuse.

This study investigated the relationships between conflict resolution tactics experienced during childhood, intimate partner conflict resolution tactics, alcohol problems and adult child physical abuse risk. Participants were 1,544 Navy recruit trainees who volunteered to complete measures of parenting practices and spousal physical violence experienced during their childhood, the conflict resolution techniques used in their intimate relationships, their personal history of alcohol problems, and child physical abuse potential. Regression analyses indicated that the receipt of intimate partner physical violence accounted for the most variance in predicting who would inflict physical violence against an intimate partner; and the infliction of intimate physical violence accounted for the most variance in predicting who would receive physical violence from an intimate partner. Other analyses indicated that among the parent and intimate partner physically violent events, parent-child violence during childhood accounted for the most variance in explaining child abuse risk in females and males, with the infliction of intimate partner violence adding only to the prediction of child abuse risk in females. Analyses also revealed that after the effects of violent experiences were removed, alcohol problems contributed significantly, albeit very modestly, to the prediction of who expressed intimate partner physical violence for males and females, who was physically injured by an intimate partner (in the case of male injury), and who was at risk of child physical abuse for males and females.

Adult↗