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241.
This study examined the main and interactive effects of multiple social risk factors and the preschool child factors of IQ and mental health on students' academic trajectories from 1st grade to 12th grade. A multiple risk score summarizing 10 environmental risk factors was calculated at 4 years of age for 145 families. Hierarchical linear modeling showed that high-risk students had lower grades and more absences from 1st grade to 12th grade than did low-risk students. Significant interactions between risk and child factors for students' grade point average (GPA) revealed that child factors had significant effects only for low-risk students. Higher IQ and better mental health improved the GPA trajectories of low-risk children but did not influence the GPA trajectories of high-risk children.  相似文献   
242.
243.
Adolescent contraceptive behavior: a review   总被引:4,自引:0,他引:4  
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244.
Loftus (1993b) has recently argued that hypothesis testing is largely irrelevant and should be replaced with a “plot-plus-error-bar” (PPE) presentation of the data. We agree that such figures can be useful. However, they do not preclude standard hypothesis testing procedures, and they should be used to supplement rather than to supplant the latter. The insufficiency of PPEs is most apparent in the case of mixed designs and factorial within-subject designs. In such cases, there is no single value that is appropriate to represent the standard error.  相似文献   
245.
The National Heart, Lung, and Blood Institute Growth and Health Study (NGHS) is an epidemiologic study of 1,213 Black and 1,166 White girls (ages 9-10) of risk factors for obesity. NGHS used Harter's Self-Perception Profile for Children (SPPC) to measure domain-specific competence and overall self-worth. This report reviews the psychometric properties of the SPPC in this biracial cohort at baseline and Year 3 visits (ages 11-12). Simple structure yielding unique components for each of the SPPC domains was obtained for White but not Black girls, whether analyzed overall or by parental education level. Internal consistency was higher for White girls in both years. The lack of simple structure was reflected in the higher correlations among the subscales for Black girls. The structure and internal consistency improved in Year 3 for Black girls, indicating that the physical appearance and athletic competence domains were not yet fully differentiated at baseline. Readers should be cautious, however, when interpreting the SPPC in young Black girls.  相似文献   
246.
Independent measures of age of acquisition (AoA), name agreement, and rated object familiarity were obtained from groups of British subjects for all items in the Snodgrass and Vanderwart (1980) picture set with single names. Word frequency measures, both written and spoken, were taken from the Celex database (Centre for Lexical Information, 1993). The line drawings were presented to a separate groupof participants in an object naming task, and vocal naming latencies were recorded. A subset of 195 items was selected for analysis after excluding items with, for example, low name agreement. The major determinants of picture naming speed were the frequency of the name, the interaction between AoA and frequency, and name agreement. (The main effect of the AoA of the name and the effect of the rated image agreement of the picture were also significant on one-tailed tests.) Spoken name frequency affects object naming times mainly for items with later-acquired names.  相似文献   
247.
Peak shift revisited: a test of alternative interpretations   总被引:1,自引:0,他引:1  
In Experiment 1, 2 groups of human subjects were trained to respond to 1 of 2 light intensity stimuli, S2 or S4, and then were tested for generalization with a randomized series of increasing values from S1 to S11. Both groups, including the group trained to respond to dimmer value, showed peak shifts to a brighter more centrally located test stimulus. In Experiment 2, which used line angle stimuli, both the size of the difference between S+ and S- and the range of test stimuli that extended beyond S+ were varied. The larger the S(+)-S- separation and the larger the range, the greater was the peak shift obtained. In Experiment 3, training involved an S- (line angle) surrounded by 2 S+ values with testing symmetrical about the training values and covering either a narrow or a wide range. The wide range produced greater peak shifts in both directions from S-. All 3 experiments support an adaptation-level interpretation of intradimensional discrimination learning and generalization test performance in human subjects. Related work with animals suggests the presence of similar processes.  相似文献   
248.
Pigeons were trained to match color and line orientation element or compound samples in a symbolic matching-to-sample task. In subsequent test sessions with element and compound samples, there was an initial superiority of element matching for the element-trained group and of compound matching for the compound-trained group. This difference persisted over the course of 100 test sessions for the element-trained group, whereas element- and compound-matching accuracy converged for the compound-trained group. In a second experiment, in which sample duration was manipulated, element-matching accuracy was superior to compound-matching accuracy for both groups. Thus, element-matching accuracy was superior to compound-matching accuracy under conditions that rule out generalization decrement and training history as explanations. The data are interpreted as supporting the view that the dimensions of visual compound stimuli compete for a limited cognitive resource.  相似文献   
249.
The touch screen system has been employed as a device for the measurement of responses and presentation of stimuli in pigeon laboratories for 4 years. Its contributions to the study of the pigeon’s behavior include the addition of response location information and an increase in the versatility of stimulus presentation. Along with the advantages of this system come some cautions. Limitations on response registration and time to construct stimuli are both concerns. Using response location as a dependent variable and distance of response registration from the pecking surface as an independent variable, the affordance of the touch screen system is investigated.  相似文献   
250.
Working with shame in psychoanalytic treatment   总被引:1,自引:0,他引:1  
Shame is a central human affect, reflecting feelings of defect, inferiority, and failure of the self. It is, therefore, a proper focus for psychoanalytic treatment. Beginning with Freud's seminal attention to narcissism and the ego ideal, the possibility for studying shame and its relation to the ego ideal (i.e. the loving function of the superego) was inherent in psychoanalytic theory, but Freud's pursuit of intrapsychic conflict and the punitive superego postponed further elaboration of shame. Interest in the relation of the ego ideal to the superego (Hartmann, 1950; Reich, 1954), and in the ideal self (Sandler et al., 1963; Schafer, 1960, 1967) opened the way to further study of shame. Kohut's contributions, with their focus on narcissism and self-pathology, have given a language and perspective on self-deficits allowing elaboration of shame's place in psychoanalytic treatment. In this paper, I have focused on the treatment of shame in two patients. I suggest that shame lies at the very center of the narcissistic patient's pathology, with primary internal shaming (directed at the self's failures and inadequacies) permeating all aspects of the treatment. For the neurotic patient, shame is more circumscribed, reflecting partial failures of the self; it tends to be reactive, relating to passive withdrawal from internal conflict and castration fears, and is intermixed with oedipal manifestations. I have described clinical sequences that demonstrate my approach to working with shame in each of these patients. In both cases, the task is to recognize, acknowledge, accept, and investigate the patient's shame. Only after such empathic investigation can underlying conflictual and genetic derivatives be productively pursued. This sequence is often intuitively followed in analysis, but in this paper I have attempted to articulate more systematically shame's role in psychoanalytic treatment.  相似文献   
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