An experimental evaluation of three theories of auditory stream segregation

Three theories of auditory stream segregation were evaluated. In two-part trials, subjects heard an induction sequence, whose effects upon an immediately subsequent test sequence were measured. The rhythm and total duration of Induction Sequence tones were varied in two experiments. The similarity between induction and test sequences aided segregation, but rhythmic predictability and longer tone durations did not. Frequency alternation during the induction sequence was not necessary to induce segregation in the test sequence. Furthermore, peripheral processes inadequately account for the segregation effects found. The data suggest that, once a distinct percept emerges from an auditory scene, properties derived from the percept (particularly changes) are fed back to control the ongoing analysis of that auditory scene. A neural adaptation to stimuli with constant properties may form part of this analysis.     

The perceptual segregation of simultaneous vowels with harmonic,shifted, or random components

This experiment was an investigation of the ability of listeners to identify the constituents of double vowels (pairs of synthetic vowels, presented concurrently and binaurally). Three variables were manipulated: (1) the size of the difference in FO between the constituents (0, 1/2, and 6 semitones); (2) the frequency relations among the sinusoids making up the constituents: harmonic, shifted (spaced equally in frequency but not integer multiples of the FO), and random; and (3) the relationship between the F0 contours imposed on the constituents: steady state, gliding in parallel, or gliding in opposite directions. It was assumed that, in the case of the gliding contours, the harmonics of each vowel would “trace out” their spectral envelope and potentially improve the definition of the formant locations. It was also assumed that the application of different FO contours would introduce differences in the direction of harmonic movement (common fate), thus aiding the perceptual segregation of the two vowels. The major findings were the following: (1) For harmonic constituents, a difference in FO leads to improved identification performance. Neither tracing nor common-fate differences add to the effect of pitch differences. (2) For shifted constituents, a difference between the spacing of the constituents also leads to improved performance. Formant tracing and common fate contribute some further improvement (3) For random constituents, tracing does not contribute, but common fate does.     

Rational and irrational beliefs in counselling psychology

Rational-emotive therapy (RET) holds that people largely make themselves neurotically anxious, depressed, hostile, and self-denigrating by strongly holding major dogmatic, absolutist, musturbatory beliefs and that they can use several cognitive, emotive and behavioral methods to modify these beliefs and increase their emotional health. This paper presents some evidence supporting this hypothesis and outlines the counseling advantages and disadvantages of active-directive cognitive restructuring.Invited address to British Psychological Association, Leeds, England, April 16, 1988.     

Responses to Persons with AIDS: Fear of Contagion or Stigma?1

Recently it has been argued that responses to persons with Acquired Immune Deficiency Syndrome (AIDS) are more a function of the association of AIDS with homosexuality than they are concerns about contagion. This research provided a further test of these arguments using an experimental design in which the target disease's contagiousness and association with homosexuality were manipulated. The results indicated that willingness to interact with a disease victim was strongly related to the contagiousness of the disease but only weakly related to its association with homosexuality. These findings are in line with recent research on lay conceptions of physical illness and argue that avoidance of disease victims, including persons with AIDS, primarily reflects concerns over contracting the disease. The implications of these findings for lay illness conceptions and how lay people respond to disease victims are discussed.     

The effects of attractiveness, dominance, and attribute differences on information acquisition in multiattribute binary choice

Two process tracing studies investigated how the information acquisition process in a binary choice task is influenced by the overall level of attractiveness of alternatives, by the magnitude of differences in attractiveness of alternatives, and by the dominance of one alternative. All three factors influenced the subjects' information selection process regarding the multiattribute choice alternatives. Subjects selected more information when the attractiveness difference was small and when one of the alternatives was not dominant. Moreover, they considered more information when the choice alternatives were both unattractive. These findings were obtained when information was presented about the alternatives both numerically and nonnumerically. The experimental results were explained within a sequential sampling strategy framework.     

Casuistry as methodology in clinical ethics

This essay focuses on how casuistry can become a useful technique of practical reasoning for the clinical ethicist or ethics consultant. Casuistry is defined, its relationship to rhetorical reasoning and its interpretation of cases, by employing three terms that, while they are not employed by the classical rhetoricians and casuists, conform, in a general way, to the features of their work. Those terms are (1) morphology, (2) taxonomy, (3) kinetics. The morphology of a case reveals the invariant structure of the particular case whatever its contingent features, and also the invariant forms of argument relevant to any case of the same sort: these invariant features can be called topics. Taxonomy situates the instant case in a series of similar cases, allowing the similarities and differences between an instant case and a paradigm case to dictate the moral judgment about the instant case. This judgment is based, not merely on application of an ethical theory or principle, but upon the way in which circumstances and maxims appear in the morphology of the case itself and in comparison with other cases. Kinetics is an understanding of the way in which one case imparts a kind of moral movement to other cases, that is, different and sometimes unprecedented circumstances may move certain marginal or exceptional cases to the level of paradigm cases. In conclusion, casuistry is the exercise of prudential or practical reasoning in recognition of the relationship between maxims, circumstances and topics, as well as the relationship of paradigms to analogous cases.     

Multidimensional Role Ambiguity and Role Satisfaction: A Prospective Examination Using Interdependent Sport Teams

This study examined the prospective relationships between multidimensional role ambiguity and role satisfaction using interdependent sports teams. Midseason perceptions of role ambiguity and role satisfaction were recorded by 246 British secondary school rugby ( n = 156) and field hockey ( n = 90) players. One month later, role satisfaction was assessed again, along with a measure of dispositional negative affectivity. After controlling for the influence of negative affectivity and midseason role satisfaction, midseason role ambiguity explained significant variance in late-season offensive and defensive role satisfaction. Findings support a prospective relationship between role ambiguity and role satisfaction, as predicted by theory (Kahn et al., 1964), and underscore the necessity of controlling for "third" variables. From an applied perspective, results also highlight the importance of ensuring that role ambiguity is avoided within interdependent sports teams.     

Obsessive Passion: A Compensatory Response to Unsatisfied Needs

The present research investigated the role of two sources of psychological need satisfaction (inside and outside a passionate activity) as determinants of harmonious (HP) and obsessive (OP) passion. Four studies were carried out with different samples of young and middle‐aged adults (e.g., athletes, musicians; total N = 648). Different research designs (cross‐sectional, mixed, longitudinal) were also used. Results showed that only a rigid engagement in a passionate activity (OP) was predicted by low levels of need satisfaction outside the passionate activity (in an important life context or in life in general), whereas both OP and a more favorable and balanced type of passion, HP were positively predicted by need satisfaction inside the passionate activity. Further, OP led to negative outcomes, and HP predicted positive outcomes. These results suggest that OP may represent a form of compensatory striving for psychological need satisfaction. It appears important to consider two distinct sources of need satisfaction, inside and outside the passionate activity, when investigating determinants of optimal and less optimal forms of activity engagement.