Determining the sample size for a replication attempt: A short and simple microcomputer program

Replication studies frequently fail to detect genuine effects because too few subjects are employed to yield an acceptable level of power. To remedy this situation, a method of sample size determination in replication attempts is described that uses information supplied by the original experiment to establish a distribution of probable effect sizes. The sample size to be employed is that which supplies an expected power of the desired amount over the distribution of probable effect sizes. The method may be used in replication attempts involving the comparison of means, the comparison of correlation coefficients, and the comparison of proportions. The widely available equation-solving program EUREKA provides a rapid means of executing the method on a microcomputer. Only ten lines are required to represent the method as a set of equations in EUREKA’s language. Such an equation file is readily modified, so that even inexperienced users find it a straightforward means of obtaining the sample size for a variety of designs.     

Can Life Be Evaluated? The Jewish Halachic Approach vs. The Quality of Life Approach in Medical Ethics: A Critical View

In recent years there has been an increase in the number of requests formercy killings by patients and their relatives. Under certain conditions,the patient may prefer death to a life devoid of quality. In contrast to thosewho uphold this quality of life approach, those who hold the sanctity oflife approach claim that life has intrinsic value and must be preservedregardless of its quality. This essay describes these two approaches,examines their flaws, and offers a golden path between the two extremepositions.We discuss the halachic and the secular views, arguing for a balancebetween the sanctity of life and the quality of life. We argue that, indeed,such a balance exists in practice, and that life is important, but it is not sacred. Life can be evaluated, but quality of life is not the solecriterion.     

Prediction of Job Retention Using a Brief Projective Test Battery: a Preliminary Report

The use of objectively validated projective tests in personnel decisions has been limited in recent years because of the perception that such tests are highly subjective, difficult to administer, and difficult to score in a reliable manner. The present paper demonstrates the use of a brief (½ hour) projective test battery consisting of the Bender–Gestalt, House–Tree–Person, and a free drawing test which can be administered in a personnel office and scored blindly using an objective scoring system. The study showed that such a battery could predict six month retention rates in a sample of recently hired corrections officers at statistically significant rates (2 = 6.25, p < 0.05) despite the fact that the individuals had already been thoroughly prescreened using the company's comprehensive normal procedures. The possible uses and advantages of a language-free projective battery are discussed along with future research directions.     

Major world events and discrimination

It is known that a major world event caused by one group can influence perceptions of other social groups. The impact of the events of September 11, 2001 on religious and ethnic discrimination in the UK was assessed. Of seven ethnic groups, Pakistanis and Bangladeshis, who were primarily Muslim, reported the greatest increase between pre- and postevent discrimination. So, the attacks on the USA by al-Qaeda, a radical Islamic organization, activated discrimination against people of Islamic faith in the UK. These results highlight links between world events and intergroup relations, and may serve to remind norm violators that the harm they do to people of other groups can impact people of groups perceived to share their values, even in geographically distant places.     

On how we perceive the social world. Criticizing Gallagher's view on direct perception and outlining an alternative

Criticizing Gallagher’s view on direct perception, I develop a basic model of social perception. According to the Cartesians another person’s intentions (and similar properties) are not directly accessible to an observer. According to the cognitivist Cartesians (quasi-)conscious processes are necessary for social understanding. According to the Anti-Cartesians (Gallagher’s view) social perception is direct. Since both of these latter approaches face serious problems, I will argue in favor of an alternative: anti-cognitivist Cartesianism. Distinguishing between an active- and a passive part of the perceptual system we can describe the situation as follows: Some functionally individuated parts of our nervous system generate percepts that correspond to the properties that causally trigger the system, whilst others form percepts of properties that do not causally trigger the system. The model is basic in that it merely helps clarifying some of the fundamental concepts we need in order to describe empirical findings.     

Cognitive behavioral therapy for panic disorder and comorbidity: more of the same or less of more?

This study compared the effects of a higher dose of cognitive behavioral therapy (CBT) for panic disorder versus CBT for panic disorder combined with "straying" to CBT for comorbid disorders in individuals with a principal diagnosis of panic disorder with or without agoraphobia. Sixty-five participants were randomly assigned to one of two treatment conditions, either CBT focused solely upon panic disorder and agoraphobia or CBT that simultaneously addressed panic disorder and agoraphobia and, to a lesser degree, the most severe comorbid condition. Results indicated a significant reduction in panic disorder severity and a decline in severity of comorbid diagnoses across both treatment conditions. However, individuals receiving CBT focused only on panic disorder were more likely to meet high end-state functioning at post-treatment, even in intent-to-treat analyses, and report zero panic attacks at the 1-year follow-up, although this effect was not retained in intent-to-treat analyses. At follow-up, CBT focused only on panic disorder yielded more substantial improvement in the most severe baseline comorbid condition, although not in intent-to-treat analyses, and a greater proportion of individuals in this treatment condition were rated as having no comorbid diagnoses, even in intent-to-treat analyses. These findings raise the possibility that remaining focused on CBT for panic disorder may be more beneficial for both principal and comorbid diagnoses than combining CBT for panic disorder with 'straying' to CBT for comorbid disorders.     

Factor analytic properties of the Quality of Life Profile: examination of the nine subdomain Quality of Life Model

The Quality of Life Profile is a 54-item multidimensional measure of quality of life. The measure is based upon a theoretical approach that considers quality of life to include satisfaction with nine subdomains of functioning. To date, the factor structure of this 54-item collection has not been examined. To do so, an examination was made of the factor structure that emerged from an administration to 219 gay men, half of whom were HIV+. Analysis indicated that seven subdomains were clearly represented in seven of the 11 factors that emerged. One subdomain was fractured into two factors and one subdomain did not appear in the factor structure. Two minor factors appeared to represent issues that may be especially important to gay men living in the HIV era. The study provides insights into the structure of quality of life among gay men living in Ontario.     

Infants’ grip strength predicts mu rhythm attenuation during observation of lifting actions with weighted blocks

Research has established that the body is fundamentally involved in perception: bodily experience influences activation of the shared neural system underlying action perception and production during action observation, and bodily characteristics influence perception of the spatial environment. However, whether bodily characteristics influence action perception and its underlying neural system is unknown, particularly in early ontogeny. We measured grip strength in 12‐month‐old infants and investigated relations with mu rhythm attenuation, an electroencephalographic correlate of the neural system underlying action perception, during observation of lifting actions performed with differently weighted blocks. We found that infants with higher grip strength exhibited significant mu attenuation during observation of lifting actions, whereas infants with lower grip strength did not. Moreover, a progressively strong relation between grip strength and mu attenuation during observation of lifts was found with increased block weight. We propose that this relation is attributable to differences in infants’ ability to recognize the effort associated with lifting objects of different weights, as a consequence of their developing strength. Together, our results extend the body's role in perception by demonstrating that bodily characteristics influence action perception by shaping the activation of its underlying neural system.