Multivariate thin plate spline estimates for the posterior probabilities in the classification problem

A nonparametric estimate for the posterior probabilities in the classification problem using multivariate thin plate splines is proposed. This method presents a nonpararnetric alternative to logistic discrimination as well as to survival curve estimation. The degree of smoothness of the estimate is determined from the data using generalized crossvalidation.     

A multi-index model for quantile regression with ordinal data

In this paper, we propose a quantile approach to the multi-index semiparametric model for an ordinal response variable. Permitting non-parametric transformation of the response, the proposed method achieves a root-n rate of convergence and has attractive robustness properties. Further, the proposed model allows additional indices to model the remaining correlations between covariates and the residuals from the single-index, considerably reducing the error variance and thus leading to more efficient prediction intervals (PIs). The utility of the model is demonstrated by estimating PIs for functional status of the elderly based on data from the second longitudinal study of aging. It is shown that the proposed multi-index model provides significantly narrower PIs than competing models. Our approach can be applied to other areas in which the distribution of future observations must be predicted from ordinal response data.     

新年寄语

节日似乎是一瞬间的事情,而新的一年对你来说才刚刚开始。或许就是这一刻,在零时零分我们都做着同样的事情,认真地倒数时间,给你最重要的人来自第一时间的祝福和问候。在静默的空气中,用心凝视自己,在一个时间的起始点与自己对话。每天都被很多最流行的元素包围,却很少停下来与自己交谈。过去的一年我们对自己满意吗?对未来还有多少期待仍...     

Bayesian analysis under accelerated failure time models with error-prone time-to-event outcomes

Lifetime Data Analysis - We consider accelerated failure time models with error-prone time-to-event outcomes. The proposed models extend the conventional accelerated failure time model by allowing...     

A preliminary review of the parenting assessment and skill development service: A 10-day residential service for families at risk of child maltreatment

Tweddle's Parenting Assessment and Skill Development Service (PASDS) is a 10-day residential programme for families at risk of child maltreatment. The service aims to conduct a comprehensive parenting capacity assessment to inform case management and improve parenting practices. The aims of the study were to (1) describe the psychosocial functioning of parents taking part in PASDS, (2) describe the key parenting assessment outcomes, and (3) explore parents' experiences of participation in PASDS including (a) perceived barriers and enablers of participation and (b) perceived outcomes for their family. Participants were 18 parents who participated in Tweddle's PASDS in Melbourne, Australia. A mixed methods study comprising a case file review and qualitative interviews was conducted. Parents accessing PASDS had experienced adverse childhood events, and many were experiencing mental health difficulties. Interviews with parents revealed perceived benefits of PASDS in improving parenting knowledge and skills, family relationships, and parenting confidence. At the time of discharge, 33% of families were assessed as unable to provide independent care for their child. The current findings have important implications for the further evaluation of evidenced-based services which can improve the accuracy of parenting capacity assessments, aiding in child protection decision-making related to child placement and safety.