Maternal perceptions of and sensitivity toward very low birthweight infants with and without postnatal headmolding

To explore the attractiveness of VLBW infants with postnatal headmolding, 29 mothers of VLBW infants and 29 mothers of full-terms rated complimentary photographs of VLBW newborns with postnatal headmolding, VLBW newborns without postnatal headmolding, and full-term newborns. In a second study, facial conformation and infant attractiveness were assessed to determine the degree to which babyish head-shapes and infant attractiveness differed between VLBW and full-term infants. Finally, infant history, measures of facial conformation, and infant attractiveness ratings were regressed on maternal responsiveness scores. Overall, mothers rated photographs of VLBW newborns with postnatal headmolding as less cute; however, mothers of VLBW infants rated photographs of VLBW newborns with postnatal headmolding as more cute than did mothers of full-term infants. During the second half of the first year of life, VLBW infants had narrower mouths, their eyes were closer to the sides of the face, and there was a tendency for VLBW infants to have narrower heads; however, overall attractiveness ratings of VLBW and full-term infants did not differ. More babyish head shape (wider head shape, more babyish facial features) significantly predicted maternal responsiveness to infant cues in a freeplay session. Findings demonstrate that VLBW newborns with postnatal headmolding are more vulnerable to negative evaluations of perceived attractiveness, differences in head shape are evident in the second half of the first year of life, and babyish headshape may be one factor that affects the degree to which infants are able to elicit sensitive maternal responses.     

Playground Contexts for Aggression for Preschoolers with Hyperactivity

This study assessed the naturalistic conditions that set the occasion for aggressive behavior in three preschoolers with hyperactivity and aggression (H/A). Peer and teacher responses to preschoolers' aggression were also investigated. For a total of 114 aggressive instances observed, relatively low percentages of aggression in social play with at least one other child were documented. The antecedent condition that was most predictive of aggression was (a) when children were seeking to enter into an activity and were denied entry and (b) when another child interrupted an on-going activity. Aggression was about 14 times greater for seeking/interrupted activity than for ongoing social play. Finally, the percentage of negative responses from peers to aggression on the playground was almost three times the rate documented in past research for preschoolers without hyperactivity.     

Qualitative and quantitative considerations in encoding difficulty effects

We hypothesized that the effects of encoding difficulty on the memorability of verbal material would depend on both the type of processing induced by the difficulty manipulation and the type of processing afforded by the material. We predicted that if the processing induced by encoding difficulty were complementary to the processing afforded by the material, then difficulty would enhance recall more so than if the processing induced by the two sources were redundant. These expectations were tested by requiring subjects to process either a structured or an unstructured word list with either a sorting task or a pleasantness rating task; the difficulty of each orienting task was also manipulated. We assumed that sorting and pleasantness rating required primarily relational and individual-item processing, respectively, and that the structured and unstructured word lists afforded relational and individual-item processing, respectively. These assumptions were supported by clustering in free recall and by recognition performance. The primary finding was that difficult sorting increased recall only for the unrelated list, whereas difficult pleasantness judgments increased recall most robustly for the related list. These results support the present framework and help illuminate the boundary conditions of the “difficulty effect.”     

Gender differences in coping and daily stress in conduct-disordered and non-conduct-disordered adolescents

Research shows that conduct disorder (CD) manifests differently in boys and girls, yet little is known about specific characteristics of girls with CD. This study examined gender differences in stress and coping in both CD (n = 69) and non-conduct-disordered (NCD) adolescents (n = 64). Results indicated similar patterns of gender differences in stress and coping, although CD adolescents reported a higher frequency of stress and maladaptive coping strategies than NCDs. Girls reported more daily stress and greater use of coping associated with both social relationships and emotional venting. A significant interaction effect distinguished girls with CD from other groups by their higher level of daily stress, more frequent use of self-injurious behavior and emotion-focused coping, and deficits in active coping.     

Generalization of relative competence mediating conformity across differing tasks

Subject correctness and group agreement were initially varied for college subjects performing a multiple-choice informational task (Canadian Knowledge Inventory). On a subsequent perceptual task (Raven's Standard Progressive Matrices), the dependent variable of conformity was assessed to examine generalization of relative competence formed on the informational task. It was seen that: (1) Those who perceived themselves to be less competent than the group on the first task exhibited the greatest level of conformity on the second task, thus replicating previous research on perceived relative competence as a determinant of conformity; (2) suspicion reduced conformity.     

Decentration as a means for reducing aggression after exposure to violent stimuli

Studied the effects of decentration as a self-control process to reduce the aggression subsequent to exposure to filmed violence. 48 Belgian French-speaking military recruits were run in four groups of subjects. Two saw either aggressive or neutral slides without special instructions. The other two groups saw only aggressive slides but one underwent the decentration training while the fourth one performed a subsidiary task instead. The famous ‘weapons effect’ is replicated for those subjects who did not receive the special instructions (<.025 one-tailed test) and decentration significantly reduces aggression (<.05 one-tailed test). The absence of a change in the meaning of the slides is interpreted in terms of reappraisal of the stimuli. Besides practical questions, theoretical implications are raised concerning the social context of viewing filmed violence.     

Inhibition from semantically related primes: Evidence of a category-specific inhibition

The phenomenon of inhibition from generating successive items within a category, reported by A. S. Brown (1981), was examined in two experiments. Subjects responded on target trials by either generating targets (e.g., generating BASS to B when it followed the category name FISH, Experiment 1) or reading them (reading BASS when it followed the category name FISH, Experiment 2). Prior to target trials, all subjects received priming trials consisting of either one or four exemplars from a single semantic category, which could be either the same category as the target’s category (related priming condition) or an unrelated category (unrelated priming condition). In both experiments, different groups of subjects either read or generated primes. When primes were read, target response times (RTs) were always facilitated in the related priming condition compared with in the unrelated priming condition. However, when primes were generated, this facilitation from related primes was eliminated, except in the one-prime condition, when targets were also generated. When primes and targets were both generated, RTs in the related priming condition were slower following four primes than following one prime. Thus, category-specific inhibition from multiple related primes is greatest when both primes and targets must be actively retrieved.     

Painfulness decreases the discriminability of electric shock

Two experiments were designed to investigate the relation between the reported painfulness and the discriminability of pairs of electric shocks for which the ratio between the higher and the lower intensity was held constant. In both experiments, subjects first gave category ratings of the painfulness of single shocks in the range 40 to 4.8 mA. Then, in a discrimination experiment, they were required to identify the stronger of a pair of intensities presented in succession. The proportion of correct responses (Experiment 1) or the proportion of area under the receiver operating characteristic (Experiment 2) increased between a low-intensity pairing and a medium-intensity pairing and decreased between a medium-intensity pairing and a high-intensity pairing for subjects who rated the highest intensities as strongly painful. Subjects who gave moderate- or weak-pain ratings for the high-intensity shocks showed no significant increase or decrease in accuracy between the medium- and high-intensity pairings. Time-order errors were observed in Experiment 1. The proportion of trials on which the second stimulus of the pair was identified as the stronger increased monotonically as a function of stimulus magnitude. The results are discussed in the context of psychological assessment of analgesic procedures.     

Formation of food aversions in cancer patients receiving repeated infusions of chemotherapy

Patients receiving emetogenic chemotherapy for cancer have been found to develop aversions to normal dietary items consumed in close temporal relation to treatment administrations. These aversions are presumed to develop via conditioning processes as demonstrated in experimental studies of food aversion learning. The present study used a prospective, longitudinal design to evaluate the possible role of conditioning in the formation of aversions to normal dietary items in women receiving adjuvant chemotherapy for breast cancer. Patients were monitored for the development of aversions to foods and beverages consumed in the 24 hr periods before and after each of eight consecutive chemotherapy infusions beginning with the initial infusion. Data on the prevalence, course, and prediction of aversions to normal dietary items are reported. These results pointed to similarities and differences between aversions formed to normal dietary items during chemotherapy treatment and aversions formed to taste stimuli during experimental conditioning studies. In addition to their theoretical significance, results also suggest possible strategies for preventing the clinical problem of aversions to normal dietary items in chemotherapy patients.     

The Development of Memory for Serial Order: A Temporal-contextual Distinctiveness Model

A model of adult human memory, OSCAR, is applied to the development of memory for serial order. In the model, development of serial order memory is assumed to result from age-related changes in a dynamic learning-context signal that underpins memory for serial order. Developmental improvement in this dynamic learning-context signal leads to more temporally distinctive representations in memory, and this leads in turn to a reduction in order errors. It is shown that the model correctly predicts developmental changes in the movement error gradients in children's serially ordered recall, as well as developmental changes in the number of movement errors obtained. The model is also applied to repetition errors across development.