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Dave Riley  Moncrieff Cochran 《Sex roles》1987,17(11-12):637-655
This report asks, Do the social networks of six-year-old girls and boys differ? It then extends previously reported findings by asking, Do different groups of nonparental adults affect the early school success of boys vs girls? Data were collected from the mothers of 162 six-year-olds, using a standard procedure. The networks of boys and girls in one-parent and two-parent households are contrasted throughout the presentation of results. The composition of networks was quite similar for boys and girls, except that each group had more same-sex than opposite-sex peers. In analyses predicting early school success, the number of adult male relatives who took the child on outings away from home was positively related to the child's report card score. This effect, however, was restricted to the subgroup of one-parent (mother-only) boys. This had been predicted, based on knowledge that single-parent boys are the most at-risk subgroup in the sample, the effect of social network resources are known to be accentuated by environmental press, and male adults represent the most salient models for young boys.  相似文献   
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We evaluated a program to protect the placements of 23 highly troublesome youth in voluntary residential care by reducing youth-to-staff ratios. Specifically, the youth were moved from regular program homes (with eight youth) to reduced ratio homes (with only four youth) instead of being terminated from the program. We provide evidence supporting the assertion that youth in the study sample were highly troublesome and at high risk for program failure and more restrictive placements. Placement in the reduced ratio homes protected the trouble youths' placement, resulting in an additional mean length of stay of 950 day without an increase in program restrictiveness. Further, the reduced ratio homes increased the chances of success in the program for the study sample to a level equivalent to that for the much less troubled comparison sample. Cost estimates are also provided.  相似文献   
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The influence of motor skill learning on movement-related brain activity was investigated using electroencephalography. Previous research has indicated that experienced performers display movement-related cortical potentials (MRCPs) of smaller amplitude and later onset compared to novices. Unfortunately, previous studies have lacked ecological validity with experimenters recording the MRCP prior to simple motor tasks and applying the results to more complex motor skills. This study replicated previous research using an ecologically valid motor skill; recording the MRCP from a group of experienced guitarists and a control group of non-musicians while they played a simple scale on the guitar. Results indicated no difference between groups in early motor planning. In contrast, the later, negative slope and motor potential components were of smaller amplitude and the negative slope began later in the experienced guitarists. The data may indicate that, for experienced guitarists, a reduced level of effort is required during the motor preparation phase of the task. These findings have implications for musical instrument learning as well as motor skill acquisition in general.  相似文献   
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This paper examines age‐related differences in work motivation in two samples of 9,388 and 2,512 individuals who completed a comprehensive motivation questionnaire for selection or development purposes. In the first sample, age differences were examined by controlling for gender and investigating whether relationships between age and motivation were non‐linear. Statistically significant relationships between motivation and age were found for most motivation scales, explaining up to 12% of the variance in specific scales. The second sample was used to confirm these results and to determine whether differences on these motivation scales could be explained by additional demographic variables, which were not available in the first sample. When controlling for demographic variables, such as gender, managerial experience, and university education, the pattern of results was similar in the second data set although effects were smaller. Results generally support propositions from the literature, which suggest a shift in people's motives rather than a general decline in motivation with age: older employees were less motivated by extrinsically but more by intrinsically rewarding job features.  相似文献   
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Child empathy was examined as a moderator of the relations between positive and negative parenting behavior and child conduct problems. Participants were 56 mother-child dyads (child age M?=?10.8 years; 64 % male) and children were recruited with a range of Attention-Deficit/Hyperactivity Disorder (ADHD) symptoms. Parenting was assessed by direct observations of mothers’ praise and criticism during parent–child interactions and child empathy was measured with mother report. Child conduct problems were assessed via observation and mother-report measures, and a composite variable was created. In regression analyses, child ADHD symptoms were uniquely related to child conduct problems. Second, as hypothesized, child empathy moderated the relations between parenting and conduct problems. Mother praise was negatively related to child conduct problems at lower levels of child empathy, but this relation was not significant at higher levels of child empathy. On the contrary, mother criticism was positively related to child conduct problems at high levels of child empathy, but this relation was not significant at low levels of empathy. The results suggest that different types of parenting behavior may be differentially beneficial to children, depending on their level of empathy.  相似文献   
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