Evaluating a Group Home: Problems and Results

Summary The need for an evaluative framework for group homes for thementally ill is discussed. Evaluation involves separating implicitfrom explicit objectives. The possible objectives for a grouphome are considered in terms of the questions of who decideswhat the objectives are to be, how they are defined, and theirrelationship to the idea of normality. A further issue in decidingobjectives is whether the client's independence is to be foundwithin the group home or beyond it. The elements of a group home's regime are then considered: theseinclude control and group support. Problems in measuring theelements involved are mentioned. An evaluative scheme based upon this is then drawn up for aparticular group home, and the results described. The residentsare found to have experienced little change overall in theirlevel of independence, and this is associated with a regimewhere residents act in a dependent way towards staff, and staffperceptions of control and support are different from thoseof residents.     

The Mentally Retarded: Towards a National Programme

It is only recently that there has been national consideration of the problems and needs of the mentally retarded. Voluntary, state and federal programmes are gradually being more effectively coordinated but a good deal remains to be done. The measures that could be taken to further this process include: the establishment of a national institute on mental retardation; a select committee of the parliament to examine problems of the mentally retarded; a standing interdepartmental committee with more precise terms of reference concerning mental retardation; and action to assist in employment for the mentally retarded with the commonwealth.     

Contraceptive determinants in three leading countries

The purpose of this paper is to examine the relative importance of access to family planning and the motivation to restrict fertility in determining contraceptive use in three countries that have led the fertility transitions in their regions: Colombia, Tunisia, and Zimbabwe. A structural equations model is estimated where endogenous fertility intentions are allowed to affect contraceptive method use. Simulation methods are then used to quantify the size of the impact of intentions and access on method choice for the three countries. The results demonstrate that even after controlling for fertility intentions, family planning program variables still have important effects in all three countries.     

Extreme Copulas and the Comparison of Ordered Lists

We introduce two extreme methods to pairwisely compare ordered lists of the same length, viz. the comonotonic and the countermonotonic comparison method, and show that these methods are, respectively, related to the copula T _M (the minimum operator) and the Ł ukasiewicz copula T _L used to join marginal cumulative distribution functions into bivariate cumulative distribution functions. Given a collection of ordered lists of the same length, we generate by means of T _M and T _L two probabilistic relations Q ^M and Q ^L and identify their type of transitivity. Finally, it is shown that any probabilistic relation with rational elements on a 3-dimensional space of alternatives which possesses one of these types of transitivity, can be generated by three ordered lists and at least one of the two extreme comparison methods.     

Approximate Likelihoods for Generalized Linear Errors-in-variables Models

When measurement error is present in covariates, it is well known that naïvely fitting a generalized linear model results in inconsistent inferences. Several methods have been proposed to adjust for measurement error without making undue distributional assumptions about the unobserved true covariates. Stefanski and Carroll focused on an unbiased estimating function rather than a likelihood approach. Their estimating function, known as the conditional score, exists for logistic regression models but has two problems: a poorly behaved Wald test and multiple solutions. They suggested a heuristic procedure to identify the best solution that works well in practice but has little theoretical support compared with maximum likelihood estimation. To help to resolve these problems, we propose a conditional quasi-likelihood to accompany the conditional score that provides an alternative to Wald's test and successfully identifies the consistent solution in large samples.     

How Does the General Public Evaluate Risk Information? The Impact of Associations with Other Risks

There is a considerable body of knowledge about the way people perceive risks using heuristics and qualitative characteristics, and about how risk information should be communicated to the public. However, little is known about the way people use the perception of known risks (associated risks) to judge an unknown risk. In a first, qualitative study, six different risks were discussed in in-depth interviews and focus group interviews. The interviews showed that risk associations played a prominent role in forming risk perceptions. Associated risks were often mentioned spontaneously. Second, a survey study was conducted to confirm the importance of risk associations quantitatively. This study investigated whether people related unknown risks to known risks. This was indeed confirmed. Furthermore, some insight was gained into how and why people form risk associations. Results showed that the semantic category of the unknown risks was more important in forming associations than the perceived level of risk or specific risk characteristics. These findings were in line with the semantic network theory. Based on these two studies, we recommend using the mental models approach in developing new risk communications.