Learning models for a continuum of sensory states reexamined

Dorfman and Biderman evaluated an additive-operator learning model and some special cases of this model on data from a signal-detection experiment. They found that Kac's pure error-correction model gave the poorest fit of the special models when the predictions were generated from the maximum likelihood estimates and the initial cutoffs were set at an a priori value rather than estimated. First, this paper presents tests of an asymptotic theorem by Norman, which provide strong support for Kac's model. On the final 100 trials, every subject but one gave probability matching, and the response propcrtions appropriately normed were approximately normally distributed with variance π(1 ? π). Further analyses of the Dorfman-Biderman data based upon maximum likelihood and likelihood-ratio tests suggest that Kac's model gives a relatively good, but imperfect fit to the data. Some possible explanations for the apparent contradiction between the results of these new analyses and the original findings of Dorfman and Biderman were explored. The investigations led to the proposal that there may be nonsystematic, random drifts in the decision criterion after correct responses as well as after errors. The hypothesis gives a minor modification of the conclusions from Norman's theorem for Kac's model. It gives asymptotic probability matching for every subject, but a larger asymptotic variance than π(1 ? π), which agrees with the data. The paper also presents good Monte Carlo justification for the use of maximum likelihood and likelihood-ratio tests with these additive learning models. Results from Thomas' nonparametric test of error correction are presented, which are inconclusive. Computation of Thomas' p statistic on the Monte Carlo simulations showed that it is quite variable and insensitive to small deviations from error correction.     

Effect of snap and thoughtful judgments on person impressions

Judgment type (snap and thoughtful) and valence of stimulus person (from likable to unlikable) were varied as within-subjects factors in four studies to test whether situational and motivational variables (as opposed to the perceptual variable of unit formation) would interfere with integrative activity in forming first impressions. If such variables are influential, both the averaging and meaning shift formulations would expect that snap judgments should produce less extreme impression ratings than more thoughtful judgments. None of three indices of integrative activity (impression ratings, component ratings and variance of impression ratings) detected a difference between the snap and thoughtful response conditions for early and late judgments in a series, for moderate or extreme traits, or for between- or within-subjects designs. These findings suggest that certain boundary conditions need to be placed on the assumptions underlying the averaging and meaning shift formulations.     

The processing of deviant information in prediction and evaluation

Analyses of information integration and of retention were used to examine the processing of deviant information in prediction and evaluation tasks. Sets of test scores were presented serially for a group of hypothetical students, and subjects were asked to evaluate the performance of each student or predict each student’s performance on a comprehensive final exam. An averaging model with greater weight for the more recent scores than for the earlier scores was supported for both types of task, but the recency was more pronounced in the prediction task. Weighting of deviant scores differed in the prediction and evaluation tasks. Significant discounting (underweighting) of deviant scores was obtained only in the prediction task, The ability to recall deviant scores on uncued tests of retention was higher in the prediction task than in the evaluation task. Prediction of future performance based on inconsistent measures of past performance thus appears to be an active process involving the discovery and discounting of unrepresentative information.     

Avoidant attachment and the experience of parenting

Guided by attachment theory, this research investigated connections between avoidant attachment styles and the experience of parenting after the birth of a couple's first child. One hundred and six couples completed a battery of measures approximately 6 weeks before and 6 months after the birth of their first child. As anticipated, parents with more avoidant attachment styles experienced greater stress after the birth of their child and perceived parenting as less satisfying and personally meaningful. Attachment theory maintains that adult attachment styles should affect relationships with adults and with one's children. The present findings provide some of the first evidence that self-reported adult romantic attachment styles, which have been the focus of attachment research by social and personality psychologists, are systematically associated with parent-child relationships. They also provide insight into the processes through which secure and insecure attachment styles might be transmitted from one generation to the next.     

Regulation processes in intimate relationships: the role of ideal standards

This research investigated the consistency between partner perceptions and ideal standards (ideal-perception consistency) and the partner regulation attempts of 200 individuals involved in relationships (Study 1) and 62 heterosexual couples (Study 2). As predicted, greater regulation attempts were associated with lower ideal-perception consistency, and these links operated within 3 pivotal mate-evaluation dimensions and were moderated by perceived regulation success. Ideal-perception consistency also mediated the relation between partner regulation and relationship quality, and cross-lagged analyses suggested that ideal consistency and regulation influenced each other over time. Finally, stronger partner regulation was generally associated with more negative self-evaluations and more self-regulation by the targeted partner. These novel results support and extend the Ideal Standards Model (J. A. Simpson, G. J. O. Fletcher, & L. Campbell, 2001).     

Perceptions of conflict and support in romantic relationships: the role of attachment anxiety

Guided by attachment theory, a 2-part study was conducted to test how perceptions of relationship-based conflict and support are associated with relationship satisfaction/closeness and future quality. Dating partners completed diaries for 14 days (Part 1) and then were videotaped while discussing a major problem that occurred during the diary study (Part 2). Part 1 reveals that more anxiously attached individuals perceived more conflict with their dating partners and reported a tendency for conflicts to escalate in severity. Perceptions of daily relationship-based conflicts negatively impacted the perceived satisfaction/closeness and relationship futures of highly anxious individuals, whereas perceptions of greater daily support had positive effects. Part 2 reveals that highly anxious individuals appeared more distressed and escalated the severity of conflicts (rated by observers) and reported feeling more distressed. The authors discuss the unique features of attachment anxiety and how changing perceptions of relationship satisfaction/closeness and stability could erode commitment over time.