Binaural masking of tones by tones: Effects of uncertainty regarding the phase angle of addition of signal to masker

This paper compares performance in tone-on-tone coherent binaural masking for conditions with and without listener knowledge concerning the phase angle of addition of the signal to the masker. Uncertainty was introduced by randomizing the four phase angles: 0, 45, 90, and 135 deg. Stimuli were 125-msec tone bursts at 250 Hz. The results showed a clear decrement in detection performance under the uncertainty condition at 135 deg, with weaker evidence for decrements at other phase angle values. This supports the assumption that the decision process was a function of the phase angle in previous studies of binaural tone-on-tone masking.     

The beck anxiety inventory: Psychometric properties in a community population

This study presents data on the norms and psychometric properties of the Beck Anxiety Inventory (BAI), using a sample of 225 community adult volunteers. Maximum-likelihood confirmatory factor analyses of previously published models of the BAI: a two-factor model and a five-factor model, showed that the fit of each model was unacceptable. Also, the fit of the single-factor model was poor. Exploratory principal-components analyses with varimax and oblique rotations suggested four BAI components within this sample. Satisfactory levels of reliability were established for the BAI subscales. Finally, the relations between the BAI total and subscale scores and a related measure of anxiety and with another self-report measure of psychological distress were examined.This paper was presented at the 27th Annual Convention of the Association for Advancement of Behavior Therapy, Atlanta, Georgia, November 1993.     

Looking for two targets at the same time: One search or two?

A considerable amount of evidence suggests that, under conditions of high discriminability, subjects are able to process multiple elements in a visual display simultaneously when searching for a single target among distractors. Relatively little emphasis, however, has been placed on the question of whether subjects can search for and detect multiple targets simultaneously. This latter question is the focus of the present report. In two experiments, we compare performance in single-target and multiple-target detection tasks in order to investigate whether or not multiple targets can be detected simultaneously. In Experiment 1, subjects searched for one or two targets that were defined by color. In Experiment 2, subjects searched for a color and/or a letter target. When the two targets were presented in the same location (e.g., a red X when Target 1 was red and Target 2 was an X), they seemed to be detected simultaneously. Implications for object-based processing of visual information are discussed.     

Dimensional overlap: cognitive basis for stimulus-response compatibility--a model and taxonomy

The classic problem of stimulus-response (S-R) compatibility (SRC) is addressed. A cognitive model is proposed that views the stimulus and response sets in S-R ensembles as categories with dimensions that may or may not overlap. If they do overlap, the task may be compatible or incompatible, depending on the assigned S-R mapping. If they do not overlap, the task is noncompatible regardless of the assigned mapping. The overlapping dimensions may be relevant or not. The model provides a systematic account of SRC effects, a taxonomy of simple performance tasks that were hitherto thought to be unrelated, and suggestive parallels between these tasks and the experimental paradigms that have traditionally been used to study attentional, controlled, and automatic processes.     

Foreign slaves in Mecca and Medina in the formative Islamic period

This article is an examination of the position of foreign slaves in Mecca and Medina in the formative Islamic period. Mainly a reference piece and a prosopography, the article first examines in detail accounts of two contexts featuring slaves in Mecca: the ‘teacher(s)’ of the Prophet, and the builder(s) of the Ka^cba. It then presents a listing of the names of the slaves given in the early Arabic sources, followed by available details of their lives. The purpose of the study is to present a relatively exhaustive listing of the circumstances of slavery and the names of slaves in the formative Islamic period in order to elucidate the nature of the Meccan and Medinan social and religious systems of the time, as well as to contextualize the position of slavery in subsequent periods.     

Narrative in psychotherapy theory,practice, and research: A critical review

This paper offers a critical review of narrative approaches to therapy, in terms of theory, practice and research. It proposes that narrative approaches currently lack a theory that explains adequately how the reworking of narratives brings about changes and how a client's various narratives are integrated. Research approaches to the study of narrative in therapy are at an early stage. A review of current research into narrative approaches to therapy is presented, and suggestions are offered for further research.     

Observation can be as effective as action in problem solving

This study discusses findings that replicate and extend the original work of Burns and Vollmeyer (2002) , which showed that performance in problem-solving tasks was more accurate when people were engaged in a non-specific goal than in a specific goal. The main innovation here was to examine the goal specificity effect under both observation-based and conventional action-based learning conditions. The findings show that goal specificity affects the accuracy of problem solving in the same way when the learning stage of the task is observation-based as when it is action-based. In addition, the findings show that, when instructions do not promote goal specificity, observation-based problem solving is as effective as action-based problem solving.     

The diagnostic role of serum inflammatory and soluble proteins on dementia subtypes: correlation with cognitive and functional decline

In the past years, the possible involvement of inflammation in the pathogenesis of dementia has been the subject of several investigations. However there are restricted data about the profile of the inflammatory and soluble proteins in well evaluated Alzheimer's disease (AD), vascular dementia (VD), mild cognitive impairment (MCI) and healthy controls. There are also no reliable data regarding the relationship between the overlapping protein levels and cognitive or functional decline. We measured levels of IL-1beta, IL-2, IL-6, IL-18, TNF-alpha, beta-Amlyloid 1-40 and alpha1-antichymotrypsin levels in plasma in groups of total 82 subjects with AD, MCI, VD and controls using enzyme-linked immunosorbent assay (ELISA) method. Our study samples showed high levels of proinflammatory cytokine levels (especially IL-18) in all patient groups but only high levels of alpha1-antichymotrypsine in VD patients compared to controls. There is no significant correlation between the laboratory and clinical variables except for a link between IL-1beta and NPI scores of AD. In conclusion, this study yielded evidence of some shared mechanisms underlying AD and VD and thus motivates further studies of inflammatory markers in various types of dementia and MCI.     

Counseling utilization by ethnic minority college students

Although multicultural awareness in counseling has risen substantially in the last decade, little research has examined counseling utilization and outcomes for ethnic minorities on university campuses. A sample of 1,166 African American, Asian American, Caucasian, and Latino help-seeking university students from over 40 universities nationwide filled out the Outcome Questionnaire 45 (OQ45) at the first and last therapy sessions. Caucasian students attended significantly more sessions than all other groups. Greatest distress was found at intake in Asian American students, followed by Latino, African American, and Caucasian students. All groups appeared to benefit from therapy, as noted by a decrease in symptomatology, but none of the groups met the criteria for clinically significant change for the OQ45. Implications for therapists working with minority clients are discussed.