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Despite the well‐documented importance of parental sensitivity for child development, there is a lack of consensus regarding how best to assess it. We investigated the factor structure of maternal caregiving behavior as assessed at 12 months by the Maternal Behavior Q‐Sort (Pederson & Moran) with 274 mother‐infant dyads. Subsequently, we examined associations between these empirically‐derived dimensions and child attachment, assessed in the home and laboratory (final N = 157). Three dimensions of maternal behavior were identified, corresponding fairly closely to Ainsworth's original scales. They were labeled Cooperation/Attunement, Positivity, and Accessibility/Availability. Only Cooperation/Attunement consistently predicted home‐based attachment at 15 months and 2 years, and at comparable strength to the overall sensitivity score, suggesting that this construct may be central to sensitivity. At 18 months, compared to their primarily secure counterparts, different types of laboratory‐assessed insecure attachment were associated with different patterns of maternal behavior. Mothers in avoidant relationships (n = 18) were low on Cooperation/Attunement and Accessibility/Availability, but fairly high on Positivity. Mothers of disorganized infants (n = 11) were Cooperative/Attuned but somewhat less Positive toward, and less Accessible/Available to, their infants. A multidimensional approach to parental behavior may facilitate the identification of parenting precursors of insecure parent‐child relationships.  相似文献   
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The authors consider the problem of estimating the density g of independent and identically distributed variables XI, from a sample Z1,… Zn such that ZI = XI + σ? for i = 1,…, n, and E is noise independent of X, with σ? having a known distribution. They present a model selection procedure allowing one to construct an adaptive estimator of g and to find nonasymptotic risk bounds. The estimator achieves the minimax rate of convergence, in most cases where lower bounds are available. A simulation study gives an illustration of the good practical performance of the method.  相似文献   
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ABSTRACT

We introduce four papers comprising a Themed Section for this issue of the International Journal of Social Research Methodology, which together ‘Make the Case for Qualitative Interviews’. Here our aim is to show how this collection provides a timely contribution to key debates concerning the value of qualitative interviews, particularly as these are employed and analysed in much recent social scientific thinking. We explore ways to move beyond recent, sometimes constraining and occasionally dismissive, approaches to interviews in the social sciences through reframing and reconfiguring central questions germane to these debates. We also seek to challenge a broader neo-liberal trend towards valuing quantitative over depth qualitative research. Through this Introduction, and the collection of papers that follows, we seek to re-establish the value of qualitative interviews by shifting the focus from a preoccupation with what interviews can be said to do, towards questions centring on what can be done with interviews.  相似文献   
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In general, the precise date of onset of pregnancy is unknown and may only be estimated from ultrasound biometric measurements of the embryo. We want to estimate the density of the random variables corresponding to the interval between last menstrual period and true onset of pregnancy. The observations correspond to the variables of interest up to an additive noise. We suggest an estimation procedure based on deconvolution. It requires the knowledge of the density of the noise which is not available. But we have at our disposal another specific sample with replicate observations for twin pregnancies. This allows both to estimate the noise density and to improve the deconvolution step. Convergence rates of the final estimator are studied and compared with other settings. Our estimator involves a cut‐off parameter for which we propose a cross‐validation type procedure. Lastly, we estimate the target density in spontaneous pregnancies with an estimation of the noise obtained from replicate observations in twin pregnancies.  相似文献   
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In this paper, we consider a mixed compound Poisson process, that is, a random sum of independent and identically distributed (i.i.d.) random variables where the number of terms is a Poisson process with random intensity. We study nonparametric estimators of the jump density by specific deconvolution methods. Firstly, assuming that the random intensity has exponential distribution with unknown expectation, we propose two types of estimators based on the observation of an i.i.d. sample. Risks bounds and adaptive procedures are provided. Then, with no assumption on the distribution of the random intensity, we propose two non‐parametric estimators of the jump density based on the joint observation of the number of jumps and the random sum of jumps. Risks bounds are provided, leading to unusual rates for one of the two estimators. The methods are implemented and compared via simulations.  相似文献   
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The objective was to determine the interest and psychometric properties of a new QOL self-assessment questionnaire suitable for children 8–12 years old measuring alpha, beta and gamma changes: the “Inventaire Systémique de Qualité de vie pour Enfants” (ISQV-E©). This was a cross-sectional validation study. 288 children have completed the ISQV-E. Other tools were used: The “Autoquestionnaire de Qualité de Vie Enfants Imagé” (AUQUEI), the State-Trait Anxiety Inventory for Children (STAIC), the Children’s Depression Inventory (CDI). The internal consistency of the four scores of the ISQV-E (state, goal, rank and gap) is satisfactory. All scores have their own specificity. The data show the convergent validity, sensitivity and applicability of the ISQV-E. On the other hand, no satisfactory factorial structure was found although a multidimensional theoretical perspective was applied. The feasibility of the ISQV-E seems clearly demonstrated and the value of this new tool seems evident in contexts of physical, psychological or social problems. The validation study was promising but certain points such as test–retest reliability remain to be studied.  相似文献   
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Public communication campaigns aim to create social change by influencing audiences’ behaviors and thus help nonprofit organizations fulfill their mission. These campaigns, however, often fail to deliver their anticipated impact. Using public relations research as a theoretical lens, this paper's contribution is twofold: first, we develop a typology that classifies the different communication approaches used in public communication campaigns. Based on one of the most prominent public relations theories, the Four Models of Public Relations, we differentiate communication approaches along the dimensions of communication purpose and communication style. Combining these two dimensions in a typology, we identify the following communication approaches: directing, platforming, mobilizing, and involving. We provide numerous real‐life examples of public campaigns for each one. Second, we formulate propositions about these communication approaches’ effectiveness relying on a key concept of public relations research: namely, audience segmentation. Using the transtheoretical model, we show that audiences can be segmented along five “stages of readiness to adopt a promoted behavior.” Conceptualizing behavior change as an iterative, dynamic process that entails stage progresses as well as backdrops, we derive how audiences’ “stage of readiness” relates to the effectiveness of the identified communication approaches.  相似文献   
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In France, more and more employees, whether they are employed by state-owned or private enterprises, readily admit they suffer from stress. Although subjected to both deep and difficult transformations, post office counter clerks do not use the word. A three-year research study with counter clerks of La Poste, led by clinical sociologists from the viewpoint of clinical sociology, invites us to question the notion of stress. To begin, the paper takes the opportunity to clarify the use that a clinical sociologist makes of this English notion usually connected with individual psychology. It then shows in which circumstances the counter clerks, including those who work in offices considered ‘calm’, are in fact confronted with working conditions that qualify as stressful. Finally, through clinical cases, the paper contests the North American view of stress by showing that it is essentially founded on an individual understanding of this pathology and that it abusively overlooks the collective dimension of work in its account of a real suffering.  相似文献   
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