Atypical maternal behavior toward feeding‐disordered infants before and after intervention

The display of atypical behaviors and disrupted communication during parent–infant interactions, as assessed by the Atypical Maternal Behavior Instrument for Assessment and Classification (AMBIANCE), has been linked to disorganized infant attachment, which, in turn, has been linked to psychopathology. The present study examined the usefulness of the AMBIANCE as an indicator of the efficacy of two brief interventions in reducing atypical behaviors and disrupted communication during play interactions. Twenty‐eight mother–infant dyads participated (14 per intervention). All infants had feeding problems. One intervention, Interaction Guidance, focused on training caregivers to respond sensitively to their infants (play‐focused intervention). The other intervention focused on training mothers to use new feeding techniques (feeding‐focused intervention). Results showed a significant decrease in AMBIANCE scores in the play‐focused group from pre‐ to postintervention, but not in the feeding‐focused group. There was a significant decrease in the level of disrupted communication from pre‐ to postintervention sessions in the play‐focused group but not in the feeding‐focused group. 73% of mothers from the play‐focused group and 17% of mothers from the feeding‐focused group initially classified as “disrupted” attained a classification of “nondisrupted” at the postintervention session. Some limitations of the study include small sample size, differences in timing of assessment for each intervention, and use of samples of convenience. Nonetheless, these findings provide preliminary evidence both of the usefulness of AMBIANCE as an instrument for assessing clinical efficacy and the efficacy of Interaction Guidance. ©2001 Michigan Association for Infant Mental Health.     

At Both Ends of the Gun: Testing the Relationship Between Community Violence Exposure and Youth Violent Behavior

Much psychological inquiry has focused on understanding the contribution that exposure to urban violence makes to violent behavior among youth. However, other ways in which these variables may be related have been largely overlooked. This study compared four alternative social–ecological models of the link between community violence exposure and violent behavior to determine the degree to which (1) community violence exposure contributes to violent behavior, (2) violent behavior contributes to community violence exposure, (3) both are consequences of common antecedents, and (4) both are manifestations of the same higher order construct. Two hundred and seventy-seven adolescent offenders were interviewed about family, neighborhood, cognitive, and peer characteristics, in addition to violent behavior and community violence exposure. Results suggest that a plausible way to understand the association between community violence exposure and youth violent behavior is to consider both as representations of a general involvement in violence.     

Student Attitudes Regarding Gender Bias in Performance Evaluations of Salespeople

This study examined how students believe salesperson gender impacts evaluations of salesperson performance. Students reviewed job performance information about either male or female salespeople. The information had purportedly been prepared by the salesperson's supervisor and indicated the level of performance as high or low. Students were asked how they thought the salesperson's supervisor might respond to the performance in terms of rewards (promotion, pay increases) for high performers and corrective measures (termination, counseling) for low performers. The results indicated that students believe that supervisors would more readily reward high performing males than females with identical performances. In contrast, students believed that supervisors would react more punitively toward low performing males than females with identical performances.     

Media violence and the American public. Scientific facts versus media misinformation.

Fifty years of news coverage on the link between media violence and aggression have left the U.S. public confused. Typical news articles pit researchers and child advocates against entertainment industry representatives, frequently giving equal weight to the arguments of both sides. A comparison of news reports and scientific knowledge about media effects reveals a disturbing discontinuity: Over the past 50 years, the average news report has changed from claims of a weak link to a moderate link and then back to a weak link between media violence and aggression. However, since 1975, the scientific confidence and statistical magnitude of this link have been clearly positive and have consistently increased over time. Reasons for this discontinuity between news reports and the actual state of scientific knowledge include the vested interests of the news, a misapplied fairness doctrine in news reporting, and the failure of the research community to effectively argue the scientific case.     

Influence of adolescent maternal characteristics on infant development

The present study proposed that several adolescent maternal variables would be associated with infant development. Using a sample of 71 adolescent mother‐infant dyads, the study examined the relative influences of the adolescent's level of separation‐individuation (Separation‐Individuation Process Inventory), feelings of attachment towards the infant (Maternal Postnatal Attachment Scale), and feelings of anxiety regarding separation (Maternal Separation Anxiety Scale) on infant mental and motor development (Bayley Scales of Infant Development, 2nd ed.). As it was assumed that the adolescent's perceptions of being parented would provide the foundation for each of these independent variables, this factor was also included (Parental Bonding Instrument). In the current sample, adolescent separation‐individuation was the only maternal psychological variable to uniquely predict infant development, but only on the mental scale. Present findings highlight the importance of considering critical developmental processes of adolescence when exploring cognitive functioning and other outcomes in infants of adolescents. A number of possible mechanisms for the influence of separation‐individuation are considered in the discussion.     

The Conjunction Fallacy: A Derived Stimulus Relations Conceptualization and Demonstration Experiment

The Psychological Record - The conjunction fallacy (CF) comes about when the occurrence of two events is rated as more likely than either in isolation. A typical participant in a CF study is...     

Age differences in item manipulation span: the case of letter-number sequencing

The authors report 2 experiments in which they examined age differences in working memory tasks involving complex item manipulation (i.e., letter-number sequencing). In Experiment 1, age differences on tasks involving item manipulation were not greater than age differences on tasks requiring recall of items in the order in which they appeared, suggesting that older adults do not have difficulty with item manipulation per se. In Experiment 2, slower presentation rates increased age differences in item manipulation spans, although age differences at the fastest rate may be attributed to differences in strategy use. In both experiments, age differences were largest when participants were most likely to be remembering familiar sequences, suggesting that older adults may have difficulties dampening the representations of such sequences once they are activated.     

Factors shaping vividness of memory episodes: visitors' long-term memories of the 1970 Japan World Exposition

This study investigated how visitors' psychological and behavioural factors, identified in the literature, shaped their vivid long-term memories of their experiences of the Japan World Exposition, Osaka, 1970 (Expo '70) as a context. In this study, 112 memory episodes were identified from the long-term memories of 48 participants; they were rated in terms of their memory vividness and on a set of factors including affect, agenda fulfilment, intentionality, and rehearsal. The influence of these factors on the vividness of episodic and/or autobiographic memories of experiences that occurred 34 years ago was examined in two stages. First, the relationship between memory vividness and individual factors was investigated separately. Second, the relationship between memory vividness and all factors was examined through a multiple regression analysis, and the relative importance of these factors on memory vividness identified. Stage one analysis showed that all factors except intentionality were related to memory vividness in individual analyses, and curvilinear relationships between memory vividness and the factors found. Stage two analysis, in which all factors were included in a multiple regression analysis, found that rehearsal was positively related to memory vividness and all other factors not significant in the presence of rehearsal.     

Differential vascular adaptive response to stress exposure in male and female rats: role of gonadal hormones and endothelial cells

Although there are reports concerning a vascular adaptive response to stress in males, this is not yet defined in females. The aim of this study was to delineate functional gender differences in the rat vascular adaptive response to stress and to determine the ability of sex hormones to modulate the stress-induced vascular adaptive response. Responses to noradrenaline were evaluated in aortas, with and without endothelium, from intact, gonadectomized and gonadectomized-hormone-replaced males and females submitted or not to stress (2-h immobilization). Reactivity of the aorta of stressed and non-stressed intact males and females (n = 6-14 per group) was also examined in the presence of L-NAME or indomethacin. Stress decreased and gonadectomy increased maximal responses to noradrenaline in aortas with intact endothelium from both genders. Stress also reduced noradrenaline potency in males. In females, but not males, stress decreased the gonadectomy-induced noradrenaline hyper-reactivity to near that of intact non-stressed rats. Hormone replacement restored the gonadectomy-induced impaired vascular adaptive response to stress. L-NAME, but not indomethacin, abolished the stress-induced decrease in aorta reactivity of males and females. None of the procedures altered reactivity of aortas denuded of endothelium. CONCLUSION: Stress-induced vascular adaptive responses show gender differences. The magnitude of the adaptive response is dependent on testicular hormones and involves endothelial nitric oxide-system hyperactivity.     

Reorganization of learning-associated prefrontal synaptic plasticity between the recall of recent and remote fear extinction memory

We have previously shown that fear extinction is accompanied by an increase of synaptic efficacy in inputs from the ventral hippocampus (vHPC) and mediodorsal thalamus (MD) to the medial prefrontal cortex (mPFC) and that disrupting these changes to mPFC synaptic transmission compromises extinction processes. The aim of this study was to examine whether these extinction-related changes undergo further plasticity as the memory of extinction becomes more remote. Changes in synaptic efficacy in both vHPC-mPFC and MD-mPFC inputs were consequently analyzed when the memory was either 1 d or 7 d old. Increases of synaptic efficacy in the vHPC-mPFC pathway were observed when the memory was 1 d old, but not 7 d after initial extinction. In contrast, potentiation of synaptic efficacy in the MD-mPFC pathway increased over time. In rats that received low-frequency vHPC stimulation immediately after extinction, both vHPC-mPFC and MD-mPFC inputs failed to develop potentiation, and the recall of extinction (both recent and remote memories) was impaired. These findings suggest that post-extinction potentiation in vHPC-mPFC inputs may be necessary for both the recall of recent memory and post-extinction potentiation in the MD-mPFC inputs. This late potentiation process may be required for the recall of remote extinction memory.