Premenstrual syndrom

Premenstrual syndrome is a condition with cyclical mood changes occurring in 30 % of the female population of fertile ages. The symptom development is very closely related to the luteal phase indicating the existence of one or more factors during the luteal phase that provoke mental symptoms in sensitive patients. This is further supported by the fact that hysterectomized women with no menstrual bleedings but with the ovarian hormone cycle continue to show cyclical mood changes without having the cycle phase. The nature of the symptom provocating factor is still unknown but the ovarian hormones progesterone and/or estradiol are suspected. This as certain women taking oral contraceptives and sequential postmenopausal estrogen-progestagen treatment achieve mood changes. Psychological and personality factors are probably also involved, at least in the degree of the mood change and the type of mood experienced.     

Compound self-motion perception induced by two kinds of optical motion

Two kinds of flow patterns consisting of random dots were presented simultaneously to subjects to investigate whether or not two kinds of vection occur simultaneously. One pattern induces vertical linear self-translation, whereas the other induces self-rotation around a vertical axis (when either pattern is presented alone). Three sets of conditions were tested. The first condition was one in which random dots moved in a summed direction of both flow vectors. In the second condition, both flow patterns were simply overlaid, whereas in the third condition, the two kinds of flow patterns were overlaid with a depth separation produced by binocular disparity. The subjects perceived both kinds of vection simultaneously in directions opposite to those of the corresponding flow components under the first condition, whereas either vection occurred mainly under the second condition. Under the third condition, both of the flows induced each kind of vection simultaneously, despite there being no physical vector summation of dot motion. The background flow induced vection in a direction opposite to the flow direction, whereas the foreground flow induced vection in the same direction as the flow direction. These results show that induced self-translation and induced self-rotation can occur simultaneously in two ways.     

Anorexia nervosa and brain tumor in a 14-year-old girl

A 14-year-old girl with anorexia nervosa (AN) was found to have an intracranial neoplasm. Atypical psychological symptoms prompted further evaluation, including electroencephalogram and neuroimaging, which revealed a sellar and suprasellar mass. This patient had an eating disorder and a brain tumor, which appear to be two unrelated conditions. However, it remains unclear how each affected the other. The diagnosis of AN, like all other psychiatric disorders, requires that possible medical etiologies and coexisting medical problems be excluded. AN and other eating disorders are particularly difficult to diagnose in children and adolescents because they often do not present in the manner typical of adults. Perceptual and cognitive disturbances associated with AN are difficult to evaluate because children and adolescents normally change over time as they progress through different stages of development. Therefore, it is particularly important to evaluate for the presence of medical conditions when a diagnosis of an eating disorder is made in a child or adolescent.     

Culturally intelligent supervisors: Inclusion,intercultural cooperation,and psychological safety

By integrating the cultural intelligence (CQ) and diversity/inclusion literature, we attempt to make a dual contribution to the literature by understanding how subordinates' perceptions of their supervisors' CQ may enhance their intercultural cooperation via their individual psychological climate for inclusion. We further examine the role of minority members' psychological safety as a result of perceived supervisor CQ and psychological climate for inclusion. To explore these processes, we conducted three studies. Based on social processing and social learning theories, we empirically tested the relationship between perceived supervisor CQ and subordinates' intercultural cooperation and initially determined the role of one of the three dimensions of psychological climate for inclusion (i.e. integration of differences) (Study 1: two-waves; N = 316). To address the data limitation and to expand the framework (i.e. adding in the other dimensions of psychological climate), we conducted Study 2 (two-waves; N = 173). We further extended the framework to include psychological safety and obtained two-waves of data from ethnic minority members in Study 3 (N = 155). Our results supported our predictions offering novel insights into why CQ matters for supervisors of culturally diverse work units and clarify the various mechanisms on how supervisors' CQ influences intercultural cooperation in those units.     

Deflationism beyond arithmetic

The conservativeness argument poses a dilemma to deflationism about truth, according to which a deflationist theory of truth must be conservative but no adequate theory of truth is conservative. The debate on the conservativeness argument has so far been framed in a specific formal setting, where theories of truth are formulated over arithmetical base theories. I will argue that the appropriate formal setting for evaluating the conservativeness argument is provided not by theories of truth over arithmetic but by those over subject matters ‘richer’ than arithmetic, such as set theory. The move to this new formal setting provides deflationists with better defence and brings a broader perspective to the debate.

     

The Impact of Conflict Issues on Fixed-Pie Perceptions, Problem Solving, and Integrative Outcomes in Negotiation

It is argued that a negotiator's fixed-pie perception, cooperative motivation, problem-solving behavior, and integrative outcomes are influenced by the content of the negotiation—the conflict issue. Negotiation involves conflicting interests, conflicting ideas about intellective problems, or conflicting ideas about evaluative problems. Study 1 showed that individuals in a negotiation about interests have a stronger fixed-pie perception and have a lower cooperative motivation than individuals in an evaluative negotiation, with intellective negotiations taking an intermediate position. Study 2 showed that individuals in a negotiation about interests made more trade-offs and reached higher joint outcomes than individuals in an intellective or evaluative negotiation. Study 3 replicated this finding in a field study. The studies bridge insights from negotiation research and decision-making research and show that the conflict issue has important effects on the negotiation process.     

Motion induction from biological motion

A new type of motion illusion is described in which ambiguous motion becomes unidirectional on superimposition of a human figure walking on a treadmill. A point-light walker in profile was superimposed on a vertical counterphase grating backdrop. Eleven na?ve observers judged the apparent direction of motion against the grating as left or right in a two-alternative forced-choice task and found that the grating appeared to drift in a direction opposite to the walking. The illusion disappeared when the point lights moved in scrambled configurations. This indicates that the illusion is caused by biological motion that provides recognition of gaits. A human figure walking backwards produced no illusion because of the difficulty in identifying the gait. This indicates that the illusion is determined by translational motion rather than form represented from biological motion.     

Second best choices and change in risk-taking

Subjects were to reveal their best as well as their second best choices in so-called choice-dilemma problems. It was found that the second best choices consistently tended to be more risk-filled than the best choices. Implications of this finding are discussed.     

A general Bayesian multilevel multidimensional IRT model for locally dependent data

Many item response theory (IRT) models take a multidimensional perspective to deal with sources that induce local item dependence (LID), with these models often making an orthogonal assumption about the dimensional structure of the data. One reason for this assumption is because of the indeterminacy issue in estimating the correlations among the dimensions in structures often specified to deal with sources of LID (e.g., bifactor and two-tier structures), and the assumption usually goes untested. Unfortunately, the mere fact that assessing these correlations is a challenge for some estimation methods does not mean that data seen in practice support such orthogonal structure. In this paper, a Bayesian multilevel multidimensional IRT model for locally dependent data is presented. This model can test whether item response data violate the orthogonal assumption that many IRT models make about the dimensional structure of the data when addressing sources of LID, and this test is carried out at the dimensional level while accounting for sampling clusters. Simulations show that the model presented is effective at carrying out this task. The utility of the model is also illustrated on an empirical data set.