Measuring the perceptual magnet effect in the perception of /i/ by German listeners

In a study of the internal category structure of the vowel /i/, Kuhl found a “perceptual magnet effect”: Discrimination sensitivity was poorer for category instances that were acoustically similar to the category prototype than it was for category instances that were not. The typicality of category exemplars was determined by goodness judgments and was found to correlate with the acoustics of average production. Analysis and interpretation of discrimination performance relied on two important assumptions: that listeners perceived all stimuli presented as exemplars of the same vowel category and that, apart from the influence of phonetic coding, discrimination sensitivity was the same across the investigated part of the vowel space. In the present study, it is shown that production and perception estimates of the category prototype may diverge, possibly because listeners seem to prefer hyperarticulated variants of vowel categories. An approach towards measurement of intra-category discrimination minima is put forward and tested that protects against intercategory confounds and avoids the isosensitivity assumption. Received: 26 November 1997 / Accepted: 25 May 1998     

Revealing Personal Secrets

Both the health benefits and the potential drawbacks of revealing personal secrets (i.e., those that directly involve the secret keeper) are reviewed. Making the decision to reveal personal secrets to others involves a trade-off. On the one hand, secret keepers can feel better by revealing their secrets and gaining new insights into them. On the other hand, secret keepers can avoid looking bad before important audiences (such as their bosses or therapists) by not revealing their secrets. Making a wise decision to reveal a personal secret hinges on finding an appropriate confidantúsomeone who is discreet, who is perceived by the secret keeper to be nonjudgmental, and who is able to offer new insights into the secret.     

Name that tune: Identifying popular recordings from brief excerpts

We tested listeners’ ability to identify brief excerpts from popular recordings. Listeners were required to match 200- or 100-msec excerpts with the song titles and artists. Performance was well above chance levels for 200-msec excerpts and poorer but still better than chance for 100-msec excerpts. Performance fell to chance levels when dynamic (time-varying) information was disrupted by playing the 100-msec excerpts backward and when high-frequency information was omitted from the 100-msec excerpts; performance was unaffected by the removal of low-frequency information. In sum, successful identification required the presence of dynamic, high-frequency spectral information.     

How College Students With and Without Disabilities Perceive Themselves and Each Other

This study explored how college students with (n = 80) and without disabilities (n = 76) rated themselves, how each group rated members of the other group, and how each group perceived that the other group would rate them on a 24-item personality instrument that was designed to assess five factors of personality: extraversion, agreeableness, conscientiousness, emotional stability, and culture. Results revealed that the two groups rated each other in a stereotypical manner: Students with disabilities were seen as more conscientious and cultured than were students without disabilities, whereas students without disabilities were seen as more extraverted and emotionally stable than were students with disabilities. When the students rated themselves, however, no such differences between the two groups emerged. Implications of the results for clinical practice are discussed.     

A constructive proof of Craig's interpolation lemma for m-valued logic

The algebraic proof of Craig's interpolation lemma for m-valued logic was given by Rasiowa in [1]. We present here a constructive proof of this lemma, based on a Gentzen type formalization.     

Conservation of resources in community intervention

Evaluated the applications of principles of resource conservation and management in community interventions and compared these to a more individual, perception-based psychological perspective. Conservation of resource theory suggests that promotion of well-being and prevention of disease depend on the availability and successful management of resources. When resources are lacking, lost, or when invested without consequent gain, people become vulnerable to psychological and physical disorder and debilitated functioning. Resources, in this context, are defined as those things people value or those things that may help people obtain that which they value. Conservation of resource theory further suggests that resources are to a large extent common to all people, more common within a given culture and time in the developmental cycle, and only to a small extent idiographic. Further, conservation of resource theory posits that resources operate within an ecological context where feedback, sharing, and exchange operate between the individual, social context, and environment. Given these principles, it is reasoned that community interventions must acknowledge the solid base of most problems and accept that interventions must target resources and be intensive enough to change the ecology in which resources operate.