M. A. Van Selst, E. Ruthruff, and J. C. Johnston (1999) found that practice dramatically reduced dual-task interference in a Psychological Refractory Period (PRP) paradigm with 1 vocal response and 1 manual response. Results from 3 further experiments using the highly trained participants of M. A. Van Selst et al. (1999) support 4 main conclusions: (a) A processing bottleneck exists even after ...

The apparently deleterious effect of aging on dual-task performance is well established, but there is little agreement about the source of this effect. Studies of the psychological refractory period (PRP) indicate that young adults can flexibly control dual-task performance through task-coordination strategies. Thus, the performance of older adults might differ from young adults because older a...

Why is the human brain fundamentally limited when attempting to execute two tasks at the same time or in close succession? Two classical paradigms, psychological refractory period (PRP) and task switching, have independently approached this issue, making significant advances in our understanding of the architecture of cognition. Yet, there is an apparent contradiction between the conclusions de...

AIM A unilateral subfrontal interhemispheric transfalcial approach for the removal of olfactory groove meningiomas (OGM) was evaluated in terms of surgical technique, complications, clinical outcomes, and recurrence rate. MATERIAL AND METHODS Twenty-four females and eighteen males with a mean age of 59 years were operated on for OGM within a 12- year (1996-2008) period. The pre- and post-oper...

normal 0 false false false en-us x-none ar-sa background: in this randomized, double‑blinded study, we investigated the preemptive effects of propofol, remifentanil or ketamine on post‑operative pain scores and analgesic requirements in elective lower abdominal surgeries under general anesthesia during the first 24 h of post‑operative period. materials and methods: seventy five patients, ...

acoma aneurysms are complicated and high incidence lesions. the successful treatment depends on understanding the anatomical location of aneurysm. the early surgery and selecting the superior method of surgery and post-operative cares affect the surgical outcomes of these patients. in this study 30 patients who were admitted to firoozgar hospital in a 3-year period (2001-2004), undergone surger...

Extreme degree of rotation and flexion of the head during posterior fossa surgeries can lead to acute post-operative submandibular sialadenitis that can cause respiratory compromise. Identification of this problem is vital to prevent deterioration in the early post-operative period. This condition responds well to conservative management provided airway obstruction is taken care of. We discuss ...

Background: Adenoidectomy is most common paediatric surgical procedures. Commonly used methods for adenoidectomy are conventional curettage and endoscopic coblator assisted adenoidectomy. The technique of coblation has considerable influence on the duration surgery, blood lost intra operatively, pain first postoperative period. Methods: Sample selected study were children age group 3 to 11 year...

Practice can dramatically reduce dual-task interference, but typically does not eliminate interference entirely. Residual interference after practice is especially large with certain non-preferred modality pairings (e.g., auditory-manual and visual-vocal). Does this residual interference imply the existence of a persistent central-processing bottleneck? To address this question, we transferred ...

In this research, the controversial issue of whether the central bottleneck can be bypassed through task automatization was investigated. To examine this issue, participants received six single-task practice sessions with an auditory-vocal task (low vs. high pitch). We then assessed dual-task performance using the analytically tractable psychological refractory period (PRP) paradigm, in which t...