On structural equation modeling with data that are not missing completely at random

A general latent variable model is given which includes the specification of a missing data mechanism. This framework allows for an elucidating discussion of existing general multivariate theory bearing on maximum likelihood estimation with missing data. Here, missing completely at random is not a prerequisite for unbiased estimation in large samples, as when using the traditional listwise or pairwise present data approaches. The theory is connected with old and new results in the area of selection and factorial invariance. It is pointed out that in many applications, maximum likelihood estimation with missing data may be carried out by existing structural equation modeling software, such as LISREL and LISCOMP. Several sets of artifical data are generated within the general model framework. The proposed estimator is compared to the two traditional ones and found superior.The research of the first author was supported by grant No. SES-8312583 from the National Science Foundation and by a Spencer Foundation grant. We wish to thank Chuen-Rong Chan for drawing the path diagram.     

Effect of telencephalon ablation on the reinforcing and eliciting properties of species-specific events in Betta splendens

In male Betta splendens, aggressive behavior is drastically attenuated following telencephalon ablation. Because instrumental training and Pavlovian conditioning experiments with intact fish have suggested that associative factors may play an important role in the performance of agonistic behaviors, the effect of ablation on instrumental learning and Pavlovian conditioning was studied. In Experiment 1, ablation had no effect on the learning of the instrumental tunnel-swimming response reinforced by mirror presentation (i.e., viewing a conspecific), although the mirror presentations in yoked-control groups elicited fewer responses in ablates than in normal and sham-operated control fish. Yoked controls further established that instrumental responding was maintained by the reinforcement contingency and was not merely the result of increased motor activity. Experiment 2 studied Pavlovian conditioning of the components of the agonistic display. Unconditioned fin erection, gill erection, and tail beating (i.e., unconditioned responses, URs) to the mirror US all were less frequent in ablates than in normals or shams. Of these, only gill cover erection showed evidence of true conditioning (i.e., conditioned responses; CRs) in which responses to the conditioned stimulus (CS) are due to the pairings of CS and US (unconditioned stimulus). However, ablates suffered no impairment of conditioned gill erections. Ablates performed fewer fin erections to the CS; however, fin erection responses were not due to CS-US pairings but were attributable to pseudoconditioning. These results are related to hypotheses postulating the involvement of learning mechanisms in ablation-produced deficits and normal aggressive behavior.     

Understanding and taking stock of positive emotion disturbance

The prevailing view on positive emotions is that they correlate with and confer psychological health benefits for the individual, including improved social, physical and cognitive functioning. Yet an emerging wave of scientific work suggests that positive emotions are also related to a range of suboptimal psychological health outcomes, especially when the intensity, duration, or context do not optimize the individual's goals or meet current environmental demands. This paper provides an overview of the “other side” of positive emotion, by describing and reviewing evidence supporting the emerging field of positive emotion disturbance (PED). We review relevant emotion processes and key themes of PED and apply this framework to example emotional disorders, and discuss implications for psychological change and future research agendas.     

Scoring best-worst data in unbalanced many-item designs,with applications to crowdsourcing semantic judgments

Best-worst scaling is a judgment format in which participants are presented with a set of items and have to choose the superior and inferior items in the set. Best-worst scaling generates a large quantity of information per judgment because each judgment allows for inferences about the rank value of all unjudged items. This property of best-worst scaling makes it a promising judgment format for research in psychology and natural language processing concerned with estimating the semantic properties of tens of thousands of words. A variety of different scoring algorithms have been devised in the previous literature on best-worst scaling. However, due to problems of computational efficiency, these scoring algorithms cannot be applied efficiently to cases in which thousands of items need to be scored. New algorithms are presented here for converting responses from best-worst scaling into item scores for thousands of items (many-item scoring problems). These scoring algorithms are validated through simulation and empirical experiments, and considerations related to noise, the underlying distribution of true values, and trial design are identified that can affect the relative quality of the derived item scores. The newly introduced scoring algorithms consistently outperformed scoring algorithms used in the previous literature on scoring many-item best-worst data.     

Badiou,Keyser, and the Theo-mathematics of the Infinite

Abstract

This paper discusses Alain Badiou's dissolution of theology in light of his equation of ontology and mathematics and his separation of the infinite from the one. I argue, however, that Badiou leaves open a place for theology, and I exploit this for theology by drawing on the work of the American mathematician Cassius Jackson Keyser. Keyser suggests a more positive relationship between mathematics, ontology, and theology, and his claim that theology is the science of idealization allows us to begin to think about how one might go about doing philosophical theology after Badiou.     

Type A behavior, attentional style, and symptom reporting among adult men and women

Type A behavior and its components (measured on the JAS) were examined in relation to attentional style and symptom reporting in 294 healthy adult men and women. The results showed that for both men and women the JAS Type A, Job Involvement, and Hard Driving factors were all associated with self-reported attentional effectiveness as measured by the Nideffer Test of Attentional and Interpersonal Style. However, a fourth JAS factor, Speed and Impatience, was associated with Nideffer measures of cognitive overload. For both men and women, the Type A, Speed and Impatience, and Hard Driving factors were all positively associated with the number of medical and psychological symptoms reported on the Cornell Medical Index. In addition, acute psychological distress (Hopkins SCL-90R) was associated with Type A behavior for men and with Speed and Impatience for both sexes. Attention differences did not account for the observed positive relationships between Type A factors and symptom reporting with one exception; attentional overload (internal) appeared to partially explain the relationships between symptom reporting and Speed and Impatience in women. In summary, Type As described themselves as having a broader attentional focus and reported more naturally occurring physical and psychological symptoms than did Type Bs.