Extended pausing by humans on multiple fixed-ratio schedules with varied reinforcer magnitude and response requirements

We conducted three experiments to reproduce and extend Perone and Courtney's (1992) study of pausing at the beginning of fixed-ratio schedules. In a multiple schedule with unequal amounts of food across two components, they found that pigeons paused longest in the component associated with the smaller amount of food (the lean component), but only when it was preceded by the rich component. In our studies, adults with mild intellectual disabilities responded on a touch-sensitive computer monitor to produce money. In Experiment 1, the multiple-schedule components differed in both response requirement and reinforcer magnitude (i.e., the rich component required fewer responses and produced more money than the lean component). Effects shown with pigeons were reproduced in all 7 participants. In Experiment 2, we removed the stimuli that signaled the two schedule components, and participants' extended pausing was eliminated. In Experiment 3, to assess sensitivity to reinforcer magnitude versus fixed-ratio size, we presented conditions with equal ratio sizes but disparate magnitudes and conditions with equal magnitudes but disparate ratio sizes. Sensitivity to these manipulations was idiosyncratic. The present experiments obtained schedule control in verbally competent human participants and, despite procedural differences, we reproduced findings with animal participants. We showed that pausing is jointly determined by past conditions of reinforcement and stimuli correlated with upcoming conditions.     

Friendship Dissolution Within Social Networks Modeled Through Multilevel Event History Analysis

A social network perspective can bring important insight into the processes that shape human behavior. Longitudinal social network data, measuring relations between individuals over time, has become increasingly common—as have the methods available to analyze such data. A friendship duration model utilizing discrete-time multilevel survival analysis with a multiple membership random effect structure is developed and applied here to study the processes leading to undirected friendship dissolution within a larger social network. While the modeling framework is introduced in terms of understanding friendship dissolution, it can be used to understand microlevel dynamics of a social network more generally. These models can be fit with standard generalized linear mixed-model software, after transforming the data to a pair-period data set. An empirical example highlights how the model can be applied to understand the processes leading to friendship dissolution between high school students, and a simulation study is used to test the use of the modeling framework under representative conditions that would be found in social network data. Advantages of the modeling framework are highlighted, and potential limitations and future directions are discussed.     

Specificity in practice benefits learning in novice models and variability in demonstration benefits observational practice

Considerable research has shown that both demonstration and verbal instruction can facilitate learning of a motor task in inexperienced individuals. In the current study, verbal instructions were used as a means to reduce the discovery learning process and control the amount of trial-to-trial variability in demonstrations. The task required models to learn to trace a pair of circles with a 90°-relative phase pattern between the arms. Verbal instructions directed one group of models toward a single strategy, and this group improved at a faster rate and performed better in a 24-h retention test compared to a group of models in a discovery learning context. The discovery models utilized multiple strategies throughout the practice. Each model was watched for 2 days by an observer, who was instructed that they would have to produce the 90°-relative phase pattern on day 3. Observers, who watched the discovery models, performed better than those who watched the single strategy models. The results support two primary conclusions. First, trial-to-trial variability associated with strategy selection processes in a model benefits an observer by facilitating perceptual discrimination processes that may play a key role in action generation. Second, verbal instructions that reduce discovery learning during physical practice benefit acquisition and retention performance when the task has multiple strategies wherein no one strategy guarantees the best performance outcome.     

"Broken covenant": healthcare aides' "experience of the ethical" in caring for dying seniors in a personal care home

Canada's population is aging, and seniors constitute the fastest growing demographic in the nation. The chronic health conditions, limited social support, functional decline, and cognitive impairment experienced by seniors may necessitate admission to a personal care home (PCH) setting up until the time of their death. The ethical problems that arise in the care of dying patients are numerous and complicated. The care of dying seniors in PCHs, however, is largely provided by frontline workers such as healthcare aides (HCAs), who usually have little training in palliative care or ethics. Research examining the identification and resolution of ethical problems in care of the dying has been conducted from the perspectives of nurses and physicians in various clinical settings, but the voice of HCAs in PCHs is virtually absent from clinical ethics. Given that the inability to satisfactorily resolve ethical issues in clinical practice is associated with feelings of guilt, powerlessness, avoiding contact with patients, failing to provide good physical care, and increased staff turnover, an empirical examination of HCAs' experiences of ethically challenging situations is warranted. We conducted a phenomenological study to access the lived experience of HCAs (N = 12) working in proprietary and nonproprietary care homes as they encountered situations they deemed ethically challenging in providing end-of-life care to dying seniors. The findings reported here explicate: (1) the types of situations that are ethically problematic for HCAs; (2) the meanings they assign to these situations, and (3) the impact such situations have on the provision of end-of-life care.     

Subtypes of obsessive-compulsive disorder: Implications for specialized cognitive behavior therapy

Although obsessive-compulsive disorder (OCD) is a heterogeneous condition, OCD subtypes have received limited attention in trials of cognitive behavior therapy (CBT). Because many patients with OCD do not respond optimally to CBT, it is important for clinicians to consider whether variability in treatment response is related to symptom presentation. Treatment modifications for patients without overt compulsions or with hoarding symptoms show promise. In this article we discuss the available research addressing the treatment of OCD subtypes, review the clinical characteristics and treatment recommendations for prominent OCD subtypes, raise the prospect of using dysfunctional beliefs as a potentially helpful conceptual approach to subtyping OCD and matching treatment to subtypes, and consider future directions in the treatment of OCD subtypes.     

Wittgenstein on Scepticism and Nonsense

In the Tractatus Wittgenstein wrote: “Skepticism is not irrefutable, but obviously nonsensical when it tries to raise doubts where no questions can be asked.” In this paper I show how Wittgenstein developed this insight in On Certainty. My principal aim is to show that this is a logical insight, that it is bound up with the distinction between saying and showing, and that one misses the point of On Certainty if one reads it, as some commentators have, in epistemological terms. Throughout all of this I pay special attention to why Wittgenstein thought that skepticism is nonsensical, and what it might mean to say that philosophy is a logical investigation.     

Leisure counselling, coping skills and therapeutic applications

Leisure counselling is defined as the systematic exploitation of a client's past, existing or prospective hobbies, activities and interests for broad psychotherapeutic purposes. It functions as a powerful agent in the invigoration of a range of existing but inadequate coping skills, and can also act in an innovatory style when such key skills are absent. The effective functioning of leisure counselling, as this paper argues, requires a methodology of application, and the author's main contribution has been to identify a triad of approach techniques open to the leisure counsellor, namely, distraction, anticipation and confrontation, and to outline appropriate settings in which they may be fruitfully implemented. Effective leisure counselling requires a new mode of thinking, wherein leisure becomes instrumental and hobbies, activities and interests, its tools. So as to sharpen awareness of the full possible range of leisure counselling's application, this paper outlines how it may be applied across a wide span of coping needs and covers three broad domains: the need to ease phobias, panics, stress and tension states, and the aftermath of traumatic episodes; the need to create and sustain positive moods; and the need to contain and limit the destructive demands of habits and impulses as well as address the very sharp therapeutic challenge of obsessions and compulsions.     

Presidential IQ, Openness, Intellectual Brilliance, and Leadership: Estimates and Correlations for 42 U.S. Chief Executives

Individual differences in intelligence are consistently associated with leader performance, including the assessed performance of presidents of the United States. Given this empirical significance, IQ scores were estimated for all 42 chief executives from George Washington to G. W. Bush. The scores were obtained by applying missing-values estimation methods (expectation-maximization) to published assessments of (a) IQ (Cox, 1926; n =  8), (b) Intellectual Brilliance (Simonton, 1986c; n =  39), and (c) Openness to Experience (Rubenzer & Faschingbauer, 2004; n =  32). The resulting scores were then shown to correlate with evaluations of presidential leadership performance. The implications for George W. Bush and his presidency were then discussed.     

Right-Wing Authoritarianism, Attitude Salience, and Beliefs about Matters of Fact

Previous investigations have demonstrated a relationship between endorsement of right-wing authoritarian (RWA) ideology and attitudes toward social and societal issues (e.g., abortion, drug use, affirmative action, and homosexuality). By contrast, the present studies examined the relationship between RWA and beliefs about matters of fact bearing on such issues (e.g., estimates of the prevalence of third trimester abortions, AIDS, concealed weapons). Studies 1 and 2 supported the propositions that high-RWA and low-RWA participants would show differences in their informational beliefs about sociopolitical matters consistent with differences in their respective ideologies and consistent with their putative differential cynicism about human nature. Study 3 demonstrated that the relationship between RWA and informational beliefs is amplified by the heightened salience of attitudes toward the targets of those beliefs.