Causal attributions in premenstrual syndrome

Abstract

The relationship between causal attributions and symptoms was investigated with self-report inventories in patients with premenstrual syndrome (n=38) and controls (n=26) during the premenstrual as well as the intermenstrual phase of the cycle. Patients with prospectively confirmed premenstrual exacerbations of physical and psychological symptoms more frequently attributed their complaints during premenstruum to the cycle than was the case during the intermenstrual period. Controls showed no differences in types of explanations for complaints in either phase of the cycle. It appeared that patients used not only the menstrual cycle, but also psychological distress and physical exertion, more often then controls as an explanation for complaints during both phases of the cycle. Implications of the finding that patients used medical as well as non-medical explanations for complaints during the cycle are discussed with regard to treatment strategies for PMS.     

Applying Cluster Analysis to Define a Typology of Chronic Fatigue Syndrome in a Medically-Evaluated,Random Community Sample

This study involved a randomly selected, medically-evaluated, community-based sample of 166 individuals with chronic fatigue. Participants diagnosed with chronic fatigue syndrome and medically-explained chronic fatigue reported significantly more severe fatigue following exertion than the idiopathic chronic fatigue group, and participants with medically-explained chronic fatigue also reported significantly more severe fatigue following exertion than the psychiatrically-explained chronic fatigue group. A cluster analysis was performed to define a typology of chronic fatigue symptomatology for participants diagnosed with chronic fatigue syndrome. Three clusters emerged. Cluster 1 contained only one participant with chronic fatigue syndrome and was characterized by relatively low post-exertional fatigue. Cluster 2 contained a small proportion of individuals with chronic fatigue syndrome and was characterized by most severe post-exertional fatigue and most improvement in fatigue following rest. Cluster 3 contained the highest proportion of individuals with chronic fatigue syndrome, and was characterized by high post-exertional fatigue and fatigue not alleviated by rest.     

A nonparametric method to analyze interactions: The adjusted rank transform test

Experimental social psychologists routinely rely on ANOVA to study interactions between factors even when the assumptions underlying the use of parametric tests are not met. Alternative nonparametric methods are often relatively difficult to conduct, have seldom been presented into detail in regular curriculum and have the reputation - sometimes incorrectly - of being less powerful than parametric tests. This article presents the adjusted rank transform test (ART); a nonparametric test, easy to conduct, having the advantage of being much more powerful than parametric tests when certain assumptions underlying the use of these tests are violated. To specify the conditions under which the adjusted rank transform test is superior to the usual parametric tests, results of a Monte Carlo simulation are presented.     

Causes of Allais common consequence paradoxes: An experimental dissection

The common consequence paradox of Allais can be decomposed into three simpler principles: transitivity, coalescing, and restricted branch independence. Different theories attribute such paradoxes to violations of restricted branch independence only, to coalescing only, or to both. This study separates tests of these two properties in order to compare these theories. Although rank-dependent utility (RDU) theories, including cumulative prospect theory (CPT), violate branch independence, the empirical pattern of violations is opposite that required by RDU theories to account for Allais paradoxes. Data also show systematic violations of coalescing, which refute RDU theories. The findings contradict both original and CPTs with or without their editing principles of combination and cancellation. Modal choices were well predicted by Birnbaum's RAM and TAX models with parameters estimated from previous data. The effects of event framing on these tests were also assessed and found to be negligible.     

Assessment of psychopathology across and within cultures: issues and findings

Research based information on the impact of culture on psychopathology is reviewed, with particular reference to depression, somatization, schizophrenia, anxiety, and dissociation. A number of worldwide constants in the incidence and mode of expression of psychological disorders are identified, especially in relation to schizophrenia and depression. The scope of variation of psychopathological manifestations across cultures is impressive. Two tasks for future investigations involve the determination of the generic relationship between psychological disturbance and culture and the specification of links between cultural characteristics and psychopathology. To this end, hypotheses are advanced pertaining to the cultural dimensions investigated by Hofstede and their possible reflection in psychiatric symptomatology. It is concluded that the interrelationship of culture and psychopathology should be studied in context and that observer, institution, and community variables should be investigated together with the person's experience of distress and disability.