State-dependency in brain stimulation studies of perception and cognition

We address the importance of understanding initial states of neuronal populations and of state-dependent responses in cognitive neuroscience experiments with special emphasis on brain stimulation studies of perception and cognition. The approach we present is based on evidence that behavioural and perceptual effects of transcranial magnetic stimulation (TMS) are determined by initial neural activation state; by systematically manipulating neural activation states before application of TMS, one can selectively target specific, even spatially overlapping neural populations within the affected region. This approach is potentially of great benefit to cognitive neuroscience and remediation programmes as it combines high spatial and functional resolution with the ability to assess causality.     

Age of acquisition's effect on memory for semantically associated word pairs

This experiment investigated the effects of age of acquisition (AoA) in memory for associated word pairs in a cued recall task. Participants studied a list of frequency-controlled early- and late-acquired words in semantically related pairs and then were asked to recall the second word of the pair when cued with the first. Reaction time effects were found, showing that a late-acquired cue for an early-acquired target word was responded to significantly faster than other combinations. Additionally, late-acquired target words resulted in significantly more accurate responses. As significant differences were found even when frequency was controlled, the effects must therefore stem from the manipulations ofAoA. Given this evidence, the implications for AoA's effects on the organization of semantic memory are explored.     

Using Personality Constructs to Predict Performance: Narrow or Broad Bandwidth

One factor that can influence the magnitude of predictive validity of personality tests for selection is the bandwidth of the constructs measured (Ashton, Jackson, Paunonen, Helmes, & Rothstein, Journal of Research in Personality, 29, 432–442 (1995)). In addition, certain personality characteristics have been shown to be more prevalent in an occupational category (Barrick & Mount, Personnel Psychology, 44, 1–26 (1991)). The results of this study suggest the necessity to perform personality based job analysis within a specific occupational category to properly select a personality measure. Criterion validity coefficients of broad constructs were non significant. However, specific facets identified in a personality based job analysis demonstrated moderate significant correlations. In addition, applicants prefer a more narrowly defined selection test.     

Bookkeeping or Metaphysics? The Units of Selection Debate

The Units of Selection debate is a dispute about the causes of population change. I argue that it is generated by a particular `dynamical' interpretation of natural selection theory, according to which natural selection causes differential survival and reproduction of individuals and natural selection explanations cite these causes. I argue that the dynamical interpretation is mistaken and offer in outline an alternative, `statistical' interpretation, according to which natural selection theory is a fancy kind of `bookkeeping'. It explains by citing the statistical structure of a population and not by citing the causes of survival and reproduction. From the perspective of the statistical interpretation there is no substantive Units of Selection issue.     

Defeasibility And The Normative Grasp Of Context

In this article, we present an analysis of defeasible generalizations – generalizations which are essentially exception-laden, yet genuinely explanatory – in terms of various notions of privileged conditions. We argue that any plausible epistemology must make essential use of defeasible generalizations so understood. We also consider the epistemic significance of the sort of understanding of context that is required for understanding of explanatory defeasible generalizations on any topic.     

Psychological Consequences for High School Students of Having Been Sexually Harassed

The psychological and educational consequences of sexual harassment for high school students were investigated in two studies. Both studies involved a modified survey originally designed for the American Association of University Women (1993). In Study 1, which involved 760 male and 779 female high school students (mainly 16- to 19-year-olds), we compared the behaviors and attitudes of (a) students who had recently been harassed and were upset by it, and (b) students who had not been harassed. Harassment led to several negative psychological and educational consequences rather than to a general stress reaction. Consequences varied with the type of harassment experienced. In Study 2, we surveyed 30 male and 67 female university students who were enrolled in a 1st year psychology course. We found that current doubt about romantic relations was associated with two types of harassment experienced during high school. Thus, some specific consequences of harassment might be long-lasting.     

Multiple Sclerosis and Economic Well-Being: Role of Health, Age, and Duration of Illness

This study used quantitative and qualitative techniques to examine the role of health, age, and duration of illness among people with multiple sclerosis (MS) in their economic well-being. Participants were 113 adults (31 males and 82 females) with MS who lived in urban and rural regions of Australia. The results demonstrated that health and age had a significant impact on both the economic well-being and psychological adjustment of people who contract this disorder. Different health variables predicted different aspects of economic well-being. Fatigue was the major health variable that predicted costs of MS and economic pressure, with age also predicting economic pressure, whereas income levels were predicted by cognitive confusion and mobility problems. Duration of illness, gender, and urban/rural location were not significant predictors of the economic variables. These results demonstrate the importance of obtaining multiple measures of economic well-being, as well as a broad range of health-related measures, in determining the impact of MS on the economic well-being of people with this disorder.     

Variations on a technique: enhancing children's recall using narrative elaboration training

The current study examined first, whether the positive effects demonstrated by the Narrative Elaboration Technique (NET) could be further enhanced when coupled with mental reinstatement of context (MR), prior to interview, and second, compared the efficacy of the NET at a two‐week delay and a nine‐month delay. In Study 1, 47 children took part as a class in a staged event about safety. Two weeks later they received a single training session, and the following day were interviewed with either the NET (n = 16), NET + MR (n = 17), or in a control condition (n = 14). Children trained with the NET reported approximately twice as much correct information, and were more accurate, than a control group who did not receive NET training, although the combination of the NET + MR did not result in a further significant enhancement of recall. In Study 2, 22 children took part in the safety event, and nine months later received a single training session, and were interviewed the following day with either the NET (n = 11), or in a control condition (n = 11). Children who received the NET training reported more correct information than those who did not. The practical applications of the NET and its variations are discussed. Copyright © 2003 John Wiley & Sons, Ltd.     

The meaning of ‘reconstruction’ within the lived experience of mastectomy for breast cancer

This paper represents a heuristic study of the meaning and essence of ‘reconstruction’ within the lived experience of mastectomy for breast cancer. Open‐ended interviews were conducted with a sample of eight women aged 40 to 58 years, who underwent mastectomy for breast cancer. Four participants had immediate breast reconstruction; two participants had delayed breast reconstruction, and two participants decided not to have the procedure. The study demonstrates that themes of loss/change/reconstruction are inextricably linked to the experience of mastectomy. Loss of a breast was likened to bereavement and in some women caused a loss of part of their identity. The closeness of death altered the awareness the women had of their time left on earth. This awareness brought about change/reconstruction in the majority of the women, in their lives and in their relationships with others. Prior to breast reconstruction there is a place for exploring with women the meaning of ‘normal’ and ‘whole’. Implications for counselling are discussed.