Intensity fluctuations produced by multimode lasers in combination with dielectric beam splitters

The combination of an unpolarized multimode laser with standard dielectric beam control devices can give rise to large intensity fluctuations that can be troublesome in visual science experiments. A number of ways to avoid this problem are discussed.     

Evaluations of competence as a function of sex and marital status

A total of 160 female and male college students read a completed job application and an article written by the applicant. Both the job and the article were in nonsex-typed fields. The applicant was described as either female or male, and as either married, never married, widowed, or divorced. Subjects answered eight evaluate questions concerning the competence of the applicant and the merits of the article. Neither the sex nor the marital status of the applicant had a strong or consistent effect on the subjects' evaluations.     

The rod-and-frame effect: the whole is less than the sum of its parts

Since the discovery of the influence of the tilted frame on the visual perception of the orientation perceived as vertical (VPV), the frame has been treated as a unitary object-a Gestalt. We evaluated the effect of 1-line, 2-line, 3-line, and 4-line (square frame) stimuli of two different sizes, and asked whether the influence of the square frame on VPV is any greater than the additive combination of separate influences produced by the individual lines constituting the frame. We found that, for each size, the square frame is considerably less influential than the additive combination of the influences of the individual lines. The results conform to a mass action rule, in which the lengths and orientations of the individual line components are what matters and the organization of the lines into a square does not-no higher-level Gestalt property is involved in the induction effect on VPV.     

Perception time measured with the slope-transition paradigm (STP): category, set size, and task manipulations

A perception time measure was obtained with the 'slope-transition paradigm' (STP), which is described in detail. In two experiments with the paradigm, participants viewed two sequential data frames, each presented for a wide range of durations. They made a binary response based on combined information from the two frames. The results showed piecewise linear response-time versus frame-duration functions with a slope-0 branch at short durations, followed by a slope-1 branch. The duration where the two branches met (the slope transition) was interpreted as the end of the perception of frame 1. For longer durations, the participant had completed the perception of frame 1 and was forced to waste time waiting for data from frame 2. In experiment 1, an odd-digit enumeration task was used, and set size and distractor category (even digits versus consonants) were varied. In experiment 2, a same/different task with digits was used and the type of judgment (literal versus parity) was varied. Perception time increased with set size. Distractor category and judgment type affected post-perceptual processes. The perception time measure of the STP is considered in relation to the attentional blink, repetition blindness, and object files.     

Religion and the Use of Complementary and Alternative Medicine (CAM) Among Cardiac Patients

This study investigates the prevalence and predictors of using complementary and alternative medicine (CAM) among middle-aged and older patients prior to cardiac surgery. Additionally, it addresses the correlates of using 10 commonly used CAM therapies. The influence of religion on itemized CAM usage is also explored. Comprehensive data were collected from adult patients undergoing cardiac surgery through a preoperative survey 2 weeks prior to surgery, followed by a telephone interview the day before surgery. More than two-thirds of participants (80.9 %) indicated at least one CAM use. Income, religiosity, education, BMI, employment, and congestive heart failure predicted greater CAM utility. After multiple controls, major cardiac indicators were significantly positively associated with greater utility of CAM. There was also a significant positive association between religiosity and CAM use. Findings suggest considerable CAM use in this cardiac sample and certain associations among cardiac conditions, religiosity, and itemized CAM utilization. Future research is needed to investigate the potential joint therapeutic and adverse effects of drug and herbal remedies in cardiac patients.