The psychometric function: II. Bootstrap-based confidence intervals and sampling

The psychometric function relates an observer’s performance to an independent variable, usually a physical quantity of an experimental stimulus. Even if a model is successfully fit to the data and its goodness of fit is acceptable, experimenters require an estimate of the variability of the parameters to assess whether differences across conditions are significant. Accurate estimates of variability are difficult to obtain, however, given the typically small size of psychophysical data sets: Traditional statistical techniques are only asymptotically correct and can be shown to be unreliable in some common situations. Here and in our companion paper (Wichmann & Hill, 2001), we suggest alternative statistical techniques based on Monte Carlo resampling methods. The present paper’s principal topic is the estimation of the variability of fitted parameters and derived quantities, such as thresholds and slopes. First, we outline the basic bootstrap procedure and argue in favor of the parametric, as opposed to the nonparametric, bootstrap. Second, we describe how the bootstrap bridging assumption, on which the validity of the procedure depends, can be tested. Third, we show how one’s choice of sampling scheme (the placement of sample points on the stimulus axis) strongly affects the reliability of bootstrap confidence intervals, and we make recommendations on how to sample the psychometric function efficiently. Fourth, we show that, under certain circumstances, the (arbitrary) choice of the distribution function can exert an unwanted influence on the size of the bootstrap confidence intervals obtained, and we make recommendations on how to avoid this influence. Finally, we introduce improved confidence intervals (bias corrected and accelerated) that improve on the parametric and percentile-based bootstrap confidence intervals previously used. Software implementing our methods is available.     

Humility,stressful life events,and psychological well-being: Findings from the landmark spirituality and health survey

A growing body of research suggests that people who are more humble tend to enjoy better physical and mental health than individuals who are less humble. The next step in moving this literature forward involves explaining and empirically demonstrating how the potentially beneficial effects of humility arise. The purpose of this study is to address this issue by seeing whether humility buffers the effects of stressful life events on four measures of well-being: happiness, life satisfaction, depressed affect, and generalized anxiety disorder. Data from a new nationwide survey (N = 3010) suggest that the magnitude of the negative relationship between stressful life events and all four measures of well-being is reduced among people who are more humble. The theoretical implications of these findings are discussed.     

Cetacean responses to violation of expectation paradigm in a free-swim context

Animal Cognition - The investigation of individual responses to unexpected stimuli or outcomes provides insights into basic cognitive processes, such as mental representations, emotional states of...     

A developmental view of therapeutic bonding in the family: treatment of the disconnected family

Data from an ongoing research study have been used to identify a subgroup of families of severely ill, young adults who present formidable treatment challenges to the family therapist. The disconnected family is characterized by disturbances in attachment between one or both parents and the patient. In many cases, disturbances in attachment and caretaking in the family of origin are reported for the parents in these families. Disconnected families that also have intense emotional styles of relating are particularly difficult to treat. A treatment model that focuses on intergenerational attachment issues is described.     

Gender differences in social support and physical health

A large body of prospective data has accumulated linking social support to health, and most social scientists agree that low levels of support are associated with poor physical and mental health. Unfortunately, most of the research has been limited to White men. When women and people of color are included in the designs, the relationships between social support and physical health are more complicated. Prospective population-based studies provide evidence that low support is associated with increased risk of mortality in women. However, in several studies, results indicated that, for specific age groups, women with high social support have increased risk of mortality. Factors that may contribute to the observed gender differences in the social support-physical health relationship are discussed. Future research should include adequate numbers of women and more sophisticated measures of social support to move the field forward.     

The effectiveness of counselling with older people: Results of a systematic review

In 2003 the British Association for Counselling and Psychotherapy (BACP) commissioned a systematic review of the research evidence relating to counselling older people. This paper reports on some of the findings of this review, particularly those which address the effectiveness of counselling with this population. Electronic searches of the research literature spanned six databases and were supplemented by hand‐searches of reference lists and key journals, along with an extensive search of the “grey” literature. The location of papers testing interventions which fall within a definition of counselling set out by the BACP, with samples aged 50 years of age or above resulted in the inclusion of 47 relevant studies. Studies investigated a variety of mental health problems in older people, particularly depression, anxiety, dementia and the psychological impact of physical conditions such as chronic obstructive pulmonary disease. Of the 47 studies, eight tested counselling as a generic treatment, 15 tested cognitive behavioural therapy, 13 tested reminiscence therapy, and 11 tested various other specific approaches. The review concluded that counselling is efficacious with older people, particularly in the treatment of anxiety and depression and outcomes are consistent with those found in younger populations. Evidence as to the efficacy of counselling interventions in the treatment of dementia is weak.     

Ethical Analysis in Counseling: A Case for Narrative Ethics,Moral Visions,and Virtue Ethics

The author presents an overview of the current content of ethics education in counseling, grouping that content into 3 areas: decision‐making models, principle ethics, and the standard of care. It is argued that as the field of ethics education has grown, so has the need for additional content models, especially ones that enhance moral sensitivity and reduce objectification of client circumstances. The author presents 3 possible approaches to revising the conceptualization of professional ethics that meet the need for new models: moral visions, narrative ethics, and virtue ethics.     

Boosting beauty in an economic decline: mating, spending, and the lipstick effect

Although consumer spending typically declines in economic recessions, some observers have noted that recessions appear to increase women's spending on beauty products--the so-called lipstick effect. Using both historical spending data and rigorous experiments, the authors examine how and why economic recessions influence women's consumer behavior. Findings revealed that recessionary cues--whether naturally occurring or experimentally primed--decreased desire for most products (e.g., electronics, household items). However, these cues consistently increased women's desire for products that increase attractiveness to mates--the first experimental demonstration of the lipstick effect. Additional studies show that this effect is driven by women's desire to attract mates with resources and depends on the perceived mate attraction function served by these products. In addition to showing how and why economic recessions influence women's desire for beauty products, this research provides novel insights into women's mating psychology, consumer behavior, and the relationship between the two.     

Understanding the pathways to purpose: Examining personality and well-being correlates across adulthood

Although finding a purpose is almost universally accepted as a developmental achievement, relatively little research has sought to understand the potential means by which individuals do so. Using a newly developed measure, the current studies examined the personality and well-being profiles of individuals who reported following any of three different pathways to purpose: (1) proactive engagement, (2) reaction to significant life events, or (3) social learning. Across both emerging adult (n?=?179) and adult (n?=?307) samples, we demonstrated that individuals along these three pathways differ in theoretically meaningful ways. For instance, proactively engaged individuals report greater agency and openness to experience, while individuals who found a purpose primarily through reactive means are less likely to be exploring their life aims. Engagement with any pathway though coincided with greater well-being, due to the fact that following these paths may lead to a sense of purpose in life.