Effects of stimulus order on discrimination processes in comparative and equality judgements: Data and models

In typical discrimination experiments, participants are presented with a constant standard and a variable comparison stimulus and their task is to judge which of these two stimuli is larger (comparative judgement). In these experiments, discrimination sensitivity depends on the temporal order of these stimuli (Type B effect) and is usually higher when the standard precedes rather than follows the comparison. Here, we outline how two models of stimulus discrimination can account for the Type B effect, namely the weighted difference model (or basic Sensation Weighting model) and the Internal Reference Model. For both models, the predicted psychometric functions for comparative judgements as well as for equality judgements, in which participants indicate whether they perceived the two stimuli to be equal or not equal, are derived and it is shown that the models also predict a Type B effect for equality judgements. In the empirical part, the models' predictions are evaluated. To this end, participants performed a duration discrimination task with comparative judgements and with equality judgements. In line with the models' predictions, a Type B effect was observed for both judgement types. In addition, a time-order error, as indicated by shifts of the psychometric functions, and differences in response times were observed only for the equality judgement. Since both models entail distinct additional predictions, it seems worthwhile for future research to unite the two models into one conceptual framework.     

Overshadowing by fixed- and variable-duration stimuli

Two experiments investigated the effect of the temporal distribution form of a stimulus on its ability to produce an overshadowing effect. The overshadowing stimuli were either of the same duration on every trial, or of a variable duration drawn from an exponential distribution with the same mean duration as that of the fixed stimulus. Both experiments provided evidence that a variable-duration stimulus was less effective than a fixed-duration cue at overshadowing conditioning to a target conditioned stimulus (CS); moreover, this effect was independent of whether the overshadowed CS was fixed or variable. The findings presented here are consistent with the idea that the strength of the association between CS and unconditioned stimulus (US) is, in part, determined by the temporal distribution form of the CS. These results are discussed in terms of time-accumulation and trial-based theories of conditioning and timing.     

The other modality: Auditory stimuli in language switching

Language switching studies typically implement visual stimuli and visual language cues to trigger a concept and a language response, respectively. In the present study we set out to generalise this to another stimulus modality by investigating language switching with auditory stimuli next to visual stimuli. The results showed that switch costs can be obtained with both auditory and visual stimuli. Yet, switch costs were relatively larger with visual stimuli than with auditory stimuli. Both methodological and theoretical implications of these findings are discussed.     

How is the Other Approached and Conceptualized in Terms of Schutz's Constitutive Phenomenology of the Natural Attitude?<Superscript>1</Superscript>

The problem of the other was one of the central problems for the founder of phenomenology, Edmund Husserl. He investigated the other as the alter ego intensively in the Fifth Cartesian Meditation, in which he introduced the conceptions of “analogical apperception' and “pairing' as fundamental forms of “passive synthesis.' Although it is no doubt Husserl who investigated the other most seriously and intensively, there is anaporiain his theory of the other. If the other is an object of ego's intentional consciousness, the other turns out to be no more than a modification of the ego. In the face of such anaporia, some phenomenologists embarked upon inquiry into the other. This paper focuses primarily on Alfred Schutz's discussion of the “other' in general and about the “stranger' in particular.     

Adaptation of Two Family Therapy Training Instruments to Culturally Suit the Indian Context

Two family therapy training instruments, the Family Concept Assessment (FCA) and Rating Scale and Family Therapy Assessment Exercise (FTE), developed in the United States were adapted to suit the Indian cultural context. Several changes were made to the instruments while at the same time maintaining the equivalency of the scales to the original. Both the instruments were tested for face validity by a panel of cultural and content experts in the United States. The FTE was then pilot tested with an Indian sample. The psychometric properties of the adapted instrument are reported in this article including feedback from the participants.     

Types of \mathsf{I} -Free Hereditary Right Maximal Terms

The implicational fragment of the relevance logic “ticket entailment” is closely related to the so-called hereditary right maximal terms. I prove that the terms that need to be considered as inhabitants of the types which are theorems of T_→ are in normal form and built in all but one case from and only. As a tool in the proof ordered term rewriting systems are introduced. Based on the main theorem I define FIT_→ – a Fitch-style calculus (related to FT_→) for the implicational fragment of ticket entailment.     

The (HI)Stories We Live by: Power/Knowledge and Family Therapy in Africa

There is a need to Africanise family therapy so as to serve the interest of local communities. Western approaches to family therapy have been accused of being irrelevant to African contexts. They are seen as forming part of a dominant scientific knowledge which invalidates local folk and cultural psychologies and thereby continuing a historical tradition of oppressive colonial power relations. This paper aims at archaeologising and evaluating such criticism by situating family therapy within different fields of knowledge that have emerged historically and are currently co-existing in Africa. The advantages and disadvantages of dominant family therapy approaches in African contexts are explored by focussing on power relations between different knowledges in Africa. It is argued that many global narratives of family therapy offer congenial companionship to many local African narratives, but that family therapists should pay more attention to local spiritual and political narratives so as to attain more legitimacy and validation by local communities.     

Defending Particularism

In this brief response I argue that Sinnott-Armstrong has underestimated the complexities that moral principles will have to circumvent if they are to survive particularist criticism. I also argue that we cannot yet accept Gert's accounts of moral relevance and of how a sound moral rule can survive exceptions.     

Incurable suffering from the “hiatus theoreticus”? Some epistemological problems in modern medicine and the clinical relevance of philosophy of medicine

Up to now neither the question, whether all theoretical medical knowledge can at least be described as scientific, nor the one how exactly access to the existing scientific and theoretical medical knowledge during clinical problem-solving is made, has been sufficiently answered. Scientific theories play an important role in controlling clinical practice and improving the quality of clinical care in modern medicine on the one hand, and making it vindicable on the other. Therefore, the vagueness of unexplicit interrelations between medicine's stock of knowledge and medical practice appears as a gap in the theoretical concept of modern medicine which can be described as Hiatus theoreticus in the anatomy of medicine. A central intention of the paper is to analyze the role of philosophy of medicine for the clarification of the theoretical basis of medical practice. Clinical relevance and normativity in the sense of modern theory of science are suggested as criteria to establish a differentiation between philosophy of medicine as a primary medical discipline and the application of general philosophy in medicine.