The development of a general associative learning account of skill acquisition in a relative arrival-time judgment task

Current theory assumes that individuals only use information from the immediate environment to perform relative arrival-time judgment tasks. This article presents a theoretical analysis of the memory requirements of this task. The authors present an analysis of the inputs to the memory system and the processes that map those inputs onto outputs. The analysis generates a set of predictions regarding the specificity of transfer and the role of context during learning. In 3 experiments, participants decided whether pairs of aircraft would violate a minimum separation standard or pass each other safely. Participants were presented with pairs of aircraft in which properties of the pair varied along 3 structural and 3 surface dimensions. Contexts were defined by the co-occurrence of specific values along stimulus dimensions and the use of a neutral label. The results suggest that transfer was limited by the dimensions that were varied in training and the context in which those dimensions were varied. The discussion focuses on the problems that complex tasks like relative judgment pose for associative learning mechanisms and the development of precise models of cognition.     

Methodological and dispositional predictors of congruence between implicit and explicit need for achievement

In this research, the authors questioned the statistical independence of implicit and explicit motives. Their first aim was to identify a methodological factor that may have weakened implicit-explicit motive correlations in past research. Their second aim was to identify personality traits that moderate implicit-explicit motive congruence. They found that implicit and explicit need for achievement (nAch) are significantly correlated, but only if the implicit and explicit measures are matched in content. Three traits were found to uniquely moderate the relationship between implicit and explicit nAch: private body consciousness, self-monitoring, and preference for consistency. These findings indicate that implicit and explicit nAch are systematically related and suggest that some individuals may use implicit nAch as a foundation for the development of explicit nAch.     

Propositional Plausible Logic: Introduction and Implementation

Plausible Logic allows defeasible deduction with arbitrary propositions, and yet when sufficiently simplified it is very similar to the Defeasible Logics of Billington and Nute. This paper presents Plausible Logic, explains some of the ideas behind the definitions, applies Plausible Logic to an example, and proves a coherence result which indicates that Plausible Logic is well behaved. We also report the first complete implementation of propositional Plausible Logic. The implementation has a web interface which makes it available to researchers and students everywhere. The implementation is evaluated experimentally, and is shown to be capable of handling tens of thousands of rules and sufficiently many disjunctions for realistic problems.     

No Sympathy for the Devil: Narratives about Evil

Christian religious experiences usually take place within the context of a religious group or community. Some of these experiences play a central role in propagating and sustaining group identity and belief. In many Pentecostal and charismatic communities, the most conspicuous experiences of this kind are those orchestrated by the devil, including 'demon possession' and 'supernatural assault'. Often, these encounters are thought to be part of an ongoing 'spiritual war' between the forces of good and evil. Christian victory in this war clarifies and strengthens community identity. Employing an ethnographic approach, this article examines the importance of storytelling in relation to this process. Through an analysis of three oral stories, it is suggested that storytelling is the means through which experiences of evil are interpreted and understood and that it is the essential way in which these experiences are communicated by members of a community to one another.     

The effect of spatial cues on infants’ responses in the AB task,with and without a hidden object

The errors made by infants in the AB task were taken by Piaget as an indication of an inability to update their representations of the spatial location of a hidden object. This paper presents an experiment designed to further investigate the role of spatial representations in the production of the error. The introduction of strong visual cues to spatial location was found to reduce the traditional A‐not‐B search error. However, it also increased perseveration when a ‘lids‐only’ analogue of the AB task was used, in which infants are simply cued to pick up lids rather than encouraged to search for a hidden object. These results present a challenge to the dynamic systems account of the error given by Smith, Thelen, Titzer and McLin (Psychological Review, 106 (1999), 235–260), and indicate that the traditional A‐not‐B search error arises from a difficulty in updating representations of the spatial location of hidden objects. The relation of these results to Munakata’s PDP model (Developmental Science, 1 (1998), 161–211) and Thelen, Schöner, Scheier and Smith’s (Behavioural and Brain Sciences, 24 (2001), 1‐‐86) most recent dynamic systems model of the A‐not‐B error is also discussed.     

A nonlinear regression approach to estimating signal detection models for rating data

This paper considers a regression approach to estimating signal detection parameters for rating data. The methodology is based on the statistical modeling of ordinal data and requires only standard statistical software such as SAS (SAS/STAT User’s Guide, 1999) for computation. The approach is more efficient than the current practice of extracting the parameter estimates with the use of specialized software and analyzing the estimates with the use of a standard statisticalpackage. It greatly facilitate s exploration of the effects of covariates on model parameters. The method is illustrated using a published data set from a single factor multiple-alternative perceptual task, and data from a more complex factorial design examining recognition memory rating data.     

Egalitarianism and the Levelling Down Objection

In an important piece of work Derek Parfit distinguishes two different forms of egalitarianism, 'Deontic' and 'Telic' (Parfit 1995; see also Parfit 1997). He contrasts these with what he calls the Priority View, which is not strictly a form of egalitarianism at all, since it is not essentially concerned with how well off people are relative to each other. His main aim is to generate an adequate taxonomy of the positions available, but in the process he draws attention to some of the different problems they face. I shall argue that there are forms of egalitarianism overlooked by Parfit which avoid the problems encountered by Deontic and Telic Egalitarians.     

Counselling psychologists' perceptions of the impact of mandatory personal therapy on professional development--an exploratory study

A qualitative study was carried out with recently qualified and trainee counselling psychologists to investigate their opinions as to the impact of mandatory personal therapy on their professional development. The methodology employed was grounded theory using data obtained from indvidual and group interviews. The results indicate that mandatory personal therapy can lead to perceived positive outcomes in terms of professional development including: a sense of the self as a professional through developing reflexivity as a result of being in the role of client; socialization into a professional role through validational and normative experiences such as the therapist modelling good and poor practice; support during times of personal difficulty; and, personal development that leads to a perceived improved ability for the participant to distinguish between personal issues and those of the client. An important effect for participants who did not have a previous substantial experience of personal therapy appeared to be the validation of therapy as an effective psychological intervention.