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Results for “perceived”

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PubMed2007

Perceived coercion and change in perceived need for admission in patients hospitalized for eating disorders.

OBJECTIVE: Ambivalence toward treatment is characteristic of eating disorders, and patients are often admitted to inpatient programs under pressure from clinicians, family, friends, educators, or employers. This study evaluated patient perceptions of the admissions process and perceived need for hospitalization and assessed whether these perceptions remain stable in the short term. METHOD: A total of 139 patients with eating disorders completed a 13-item self-report scale on the admission experience when they were admitted to a behavioral inpatient specialty program and again 2 weeks into their hospitalization. RESULTS: Patients with anorexia nervosa reported higher levels of perceived coercion and pressure and a lower sense of procedural justice than did those with bulimia. Patients under 18 (N=35) reported more perceived coercion than did adult patients (N=104), and a trend was noted for them to disagree that they needed hospitalization. Perceptions of coercion, of pressure by others toward hospitalization, and of procedural justice were stable in the short term. However, of the 46 patients (30 of them adults) who initially did not endorse needing admission, 20 patients (17 of them adults) changed their minds by 2 weeks into hospitalization and agreed that they needed hospital admission. CONCLUSIONS: Nearly half of patients with eating disorders who denied a need for treatment on admission converted to acknowledging that they needed to be admitted within 2 weeks of hospitalization. Since treatment avoidance is associated with poor outcome, these findings suggest a need for studies assessing the long-term outcome and ethics of pressuring patients with eating disorders into treatment.

Adolescent↗

PubMed2001

Gonorrhoea screening in general practice: perceived barriers and strategies to improve screening rates.

OBJECTIVE: To investigate perceived barriers to gonorrhoea screening in general practice and suggest strategies to overcome them. DESIGN: Questionnaire-based survey. SETTING AND PARTICIPANTS: All 47 general practitioners (GPs) authorised to prescribe subsidised HIV drugs under the Pharmaceutical Benefits Scheme in inner, eastern and northern Sydney. MAIN OUTCOME MEASURES: Agreement on a five-point Likert scale with statements about attitudes and practices in relation to gonorrhoea screening of homosexually active men, and views on how testing rates could be increased. RESULTS: 32 GPs responded (68%). Perceived barriers to gonorrhoea testing included structural measures imposed by the Federal Government to limit pathology testing by GPs (the Medicare "three-test rule") (17 respondents agreed or strongly agreed), pressure from the Health Insurance Commission (HIC) to minimise pathology testing (15), concerns about confidentiality of notification procedures (8), clinical time pressure (8), and concerns about recriminations against HIV patients with gonorrhoea (6). Suggested measures to increase testing were education of gay men to request testing (25), relaxation of the three-test rule (25), easier tests (23), anonymous notification procedures, review of HIC policy on screening, and training about testing (21 each). CONCLUSIONS: Sydney GPs with high HIV caseloads perceived structural barriers to gonorrhoea testing and supported a range of achievable strategies to overcome these. As the sustained epidemic of gonorrhoea in Sydney may be directly promoting HIV transmission, these strategies should be considered urgently.

Adult↗

PubMed2001

[No effect of aircraft crash near South Limburg (the Netherlands) on self-perceived health, but an increase in perceived environmental nuisance by the inhabitants].

OBJECTIVE: To investigate the influence of an aircraft crash near the South of Limburg, the Netherlands, on the perceived physical and psychological health and annoyance of local residents. DESIGN: Controlled, blinded, follow-up questionnaire survey. METHOD: Three months before an aircraft crash occurred, randomly selected local residents and control subjects who lived approximately 20 km from the crash site were asked to complete a health questionnaire. The study was repeated one year after the crash. The aim of the survey was not mentioned in the questionnaire. The questionnaire asked about demographic features, physical health, psychological health and environmental nuisance. In the first survey, 544/926 (59%) questionnaires were successfully returned, and after the disaster this figure was 677/900 (75%). Linear regression modelling was used to check whether or not any differences in outcome were due to confounding demographic variables. RESULTS: There was no significant difference in the perceived physical and psychological health of local residents before and after the aircraft crash. A year after the crash, the nuisance level of aircraft noise reported by local residents had markedly increased. Aircraft noise was the major cause of disturbance. More than 1 in 3 residents perceived daily aircraft noise as a nuisance compared with 1 in 6 before the crash. The scores of local inhabitants for annoyance due to aircraft odour and dust doubled after the crash. Compared with control subjects, local inhabitants scored more than 20 times higher for annoyance due to aircraft odour and 40 times higher for annoyance due to dust. The reported nuisance caused by road traffic noise, odour and dust also increased, although to a lesser extent. CONCLUSION: Health was not influenced by the aircraft crash. A year after the crash, there was a strong drop in tolerance of aircraft nuisance. There was also a reduction in the tolerance of comparable nuisance due, for example, to road traffic, although this change was less marked.

Accidents, Aviation↗

PubMed1992

A comparison of the perceived and the ECG measured heart rate during cycle ergometer, treadmill and stairmill exercise before and after perceived heart rate training.

The ability to perceive exercise heart rate before and after training was tested in six young male university students, perceptions of heart rate being compared with ECG monitored heart rates during cycle ergometry, treadmill running and stairmill climbing. Between initial and final tests, subjects undertook 13 weeks of running training (2 h/day, 3-4 days/week), and during this period they compared their perceptions of heart rate with values observed on watch-type wrist-mounted pulse monitors. Individual initial perceptions showed only a moderate correlation with ECG values. This correspondence was improved as perceptions were compared with measured heart rates over the course of training, significantly so for the mode of exercise most similar to that adopted in the training sessions (treadmill running at a heart rate of 140 beats/min). The final accuracy of perceptions at a heart rate of 140 beats/min (error 8-9 beats/min during treadmill running) compared favourably with the accuracy of either pulse counting or the traditional rating of perceived exertion as commonly observed in the exercising public. This suggests that there may be an application for perceived heart rates in regulating the intensity of prescribed exercise.

Adult↗

PubMed1979

Relation between perceived depth and perceived motion in uniform flow fields.

Three experiments are reported that examined the nature of the perceptual linkage between perceived depth and perceived motion in bidirectional uniform velocity fields. In such displays there is systematic misperception of both the speeds and directions of motion of visual objects. It was found that the speed and the direction of perceived motion were related to objective velocity by the addition of a uniform velocity component across the visual field. It is proposed that this uniform component may be the result of compensation for incorrectly registered ocular rotation and that such an account may also apply to classical center-surround induced motion effects.

Depth Perception↗

PubMed2005

Perceived health status and perceived diabetes control: psychological indicators and accuracy.

OBJECTIVE: The aim of this study is to assess the association of psychological, as well as physical and sociodemographic, indicators with patients' ratings of personal health status and diabetes control and to investigate the association of mental health and depression with errors in the perception of diabetes control. METHOD: A sociodemographically diverse sample of 623 diabetes patients was recruited from the general medicine clinics of a county health care system and a Veterans Affairs health care system. We examined three types of determinants of patients' health perceptions: physical health indicators (symptoms, comorbid diagnoses, and glycosylated hemoglobin or HbA1c levels), psychological health indicators (general mental health and diabetes-related worry), and sociodemographic factors (age, race, gender, income, and education). RESULTS: After controlling for patient' sociodemographic characteristics, perceived general health was associated with patients' symptom burden and emotional distress (but not with patients' HbA1c levels). Perceived diabetes control additionally was associated with HbA1c and diabetes-related worries. Further analyses showed that both mental health and diagnosed depression were associated with errors in personal appraisals of diabetes control, with depressed patients more often inaccurately assessing their glycemic control as poor (false-positive error) and nondepressed patients more often missing poor HbA1c levels (false-negative error). CONCLUSIONS: Findings indicate that patients use a comprehensive model for assessing their general health and that depression may lead to more accurate assessments of poor glucose control.

Attitude to Health↗

PubMedDate not supplied

Assessing the perceived predictability of anxiety-related events: a report on the perceived predictability index.

Predictability, or lack thereof, is believed to play a critical role in the development and maintenance of anxiety, with unpredictability being associated with heightened levels of anxious and fearful responding. Despite the potential importance of predictability in theoretical accounts of emotional dysregulation, currently no standardized assessment instrument exists to assess predictability perceptions for anxiety-related events. The present series of four investigations report on an initial attempt to develop a self-report instrument (i.e., Perceived Predictability Index, PPI) that can measure predictability perceptions for the occurrence, duration, and termination of anxiety-related events. Initial item selection and factor structure of the instrument was based on a large sample of participants and yielded a two-factor solution: (1) prediction of anxiety-related environmental events and (2) prediction of internal events. Our subsequent studies show that the PPI possesses adequate levels of internal consistency and temporal stability over time. Additionally, the PPI demonstrated adequate divergent and convergent validity relative to other standard anxiety and fear measures. The internal dimension of the scale also demonstrated predictive validity for emotional responding during a biological challenge test. We discuss these findings in relation to the role of perceived predictability in the study of anxious and fearful responding, and offer directions for future research.

Adolescent↗

PubMed1998

Visually perceived vertical and visually perceived horizontal are not orthogonal.

The authors examined the difference in errors made by eight subjects in setting a bar of light in an otherwise darkened room to either visually perceived vertical (VPV) or visually perceived horizontal (VPH) during maintained roll-tilted positions around the naso-occipital axis. Two viewing distances were examined, 25 and 60 cm. Subjects were tested at roll-tilt angles of 10 degrees intervals from upright to body horizontal (both left ear down (LED) and right ear down (RED)) in a randomized fashion. Settings were made only after a 1 min delay at each tilt angle to allow for decay of the semicircular canal signal. Chair rotation speed was 2 degrees/s with subjects being re-tested using 1/2 degree/s (at 25 cm) to determine the effect of rotation speed. Average errors for vertical versus horizontal were significantly different from each other (P < 0.01) at both the 25 and 60 cm viewing distances. The errors follow a complex function, with VPH showing smaller errors than VPV for large roll-tilts, while the opposite was true for medium-sized roll-tilts. This was true at both chair velocities. That is, VPV and VPH are not orthogonal to one another under the conditions examined. There are large differences between individuals but each individual showed a repeatable pattern. The average extent of non-orthogonality was found to be as high as 7 degrees at some large roll-tilt angles. These findings raise questions about the appropriateness of comparing the results of studies using the different tasks VPV and VPH. Factors that might contribute to this effect are discussed, including somatosensory input and ocular counterrolling (OCR).

Adult↗

PubMed1992

Perceiving and re-perceiving objects.

A number of experiments exploring priming effects and automatization in the perception of novel objects are described, and a framework for understanding the benefits and costs of re-perceiving previously seen objects is proposed. The suggestion is that perceiving an object creates a temporary representation in an object file that collects, integrates, and updates information about its current characteristics. The contents of an object file may be stored as an object token and retrieved next time the object appears. This facilitates its re-perception when all of the attributes match and may impair it if some are changed. Thus, the world molds our minds to capitalize on earlier experiences but at the same time leaves us able readily to detect and represent any novel or unexpected objects and events.

Attention↗

PubMed2002

Perceived supervisor support: contributions to perceived organizational support and employee retention.

Three studies investigated the relationships among employees' perception of supervisor support (PSS), perceived organizational support (POS), and employee turnover. Study 1 found, with 314 employees drawn from a variety of organizations, that PSS was positively related to temporal change in POS, suggesting that PSS leads to POS. Study 2 established, with 300 retail sales employees, that the PSS-POS relationship increased with perceived supervisor status in the organization. Study 3 found, with 493 retail sales employees, evidence consistent with the view that POS completely mediated a negative relationship between PSS and employee turnover. These studies suggest that supervisors, to the extent that they are identified with the organization, contribute to POS and, ultimately, to job retention.

Adult↗

PubMed2006

When supervisors feel supported: relationships with subordinates' perceived supervisor support, perceived organizational support, and performance.

The authors surveyed full-time retail employees and their supervisors to investigate relationships of supervisors' perceived organizational support (POS) with subordinates' perceptions of support from their supervisors (perceived supervisor support [PSS]), POS, and in-role and extra-role performance. The authors found that supervisors' POS was positively related to their subordinates' perceptions of supervisor support. Subordinates' PSS, in turn, was positively associated with their POS, in-role performance, and extra-role performance. Beyond these bivariate relationships, subordinates' perceptions of support from the supervisor mediated positive relationships of the supervisors' POS with the subordinates' POS and performance. These findings suggest that supervisors who feel supported by the organization reciprocate with more supportive treatment for subordinates.

Employment↗

PubMed2005

Ovarian cancer patients' psychological distress: the role of physical impairment, perceived unsupportive family and friend behaviors, perceived control, and self-esteem.

Although research has indicated that illness-related and interpersonal stress are associated with greater psychological distress among cancer patients, little empirical attention has been given to mechanisms that account for these relationships. In the present study, 2 mechanisms for the association between illness-related stress (physical impairment) and interpersonal stress (family and friend unsupportive responses) and psychological distress of 143 ovarian cancer patients were examined cross-sectionally. Separate structural equation models tested whether physical impairment impacted patients' distress via decrements in perceived control over their illness and whether unsupportive behaviors impacted patients' distress via decrements in patients' self-esteem. Results supported the proposed models and suggest that perceived control and self-esteem are 2 mechanisms for explaining how illness-related and interpersonal stress may be associated with psychological distress among women with ovarian cancer.

Attitude to Health↗

PubMed1984

Perceived time: its relationship with locus of control, filled versus unfilled time intervals, and perceiver's sex.

The present study examined the role of locus of control and the perceiver 's sex in the estimation of filled and unfilled time intervals. One hundred male and 100 female undergraduates, ranging in age between 16 and 21 years, were administered Collins' I-E Scale followed by a time-estimation task. The latter involved judging 10 time intervals which were either "filled" with a tapping sound presented by the E, or were "unfilled." Results indicate that (a) high internals, compared to low internals, were less likely to overestimate filled intervals, but were more likely to overestimate unfilled intervals, possibly because high internals are more time-conscious; (b) the extent of absolute error in estimation is jointly affected by internality, filled/unfilled intervals, and the perceiver 's sex, but the last-mentioned variable had the most prominent independent effect. In general, males made less error in time estimation than females. It is suggested that the observed sex differences in the present study was probably due to socially learned differences in time consciousness.

Adolescent↗

PubMed2006

Using Rasch modeling to re-evaluate three scales related to physical activity: enjoyment, perceived benefits and perceived barriers.

Studies suggest that enjoyment, perceived benefits and perceived barriers may be important mediators of physical activity. However, the psychometric properties of these scales have not been assessed using Rasch modeling. The purpose of this study was to use Rasch modeling to evaluate the properties of three scales commonly used in physical activity studies: the Physical Activity Enjoyment Scale, the Benefits of Physical Activity Scale and the Barriers to Physical Activity Scale. The scales were administered to 378 healthy adults, aged 25-75 years (50% women, 62% Whites), at the baseline assessment for a lifestyle physical activity intervention trial. The ConQuest software was used to assess model fit, item difficulty, item functioning and standard error of measurement. For all scales, the partial credit model fit the data. Item content of one scale did not adequately cover all respondents. Response options of each scale were not targeting respondents appropriately, and standard error of measurement varied across the total score continuum of each scale. These findings indicate that each scale's effectiveness at detecting differences among individuals may be limited unless changes in scale content and response format are made.

Evaluation Studies as Topic↗

PubMed1999

Relationships among educational material readability, client literacy, perceived beneficence, and perceived quality.

Illiteracy remains a pervasive problem that compromises quality health care, limits understanding of health information, and potentially leads to poor health outcomes. This study demonstrated that participants' measured reading level was significantly lower than both their stated years of education and readability of an educational pamphlet. A positive relationship was identified between measured reading level and pamphlet helpfulness (client-perceived beneficence). Participants perceived care quality as good to very good. Quality client education requires use of either educational materials appropriate for the measured reading level of clients or alternatives to written material.

Adult↗

PubMed1986

Effect of perceived brightness on perceived time.

When light intensity demarcating a 1-sec. interval was increased, there was an increase in the perceived duration of the interval. The increase in perceived duration occurred whether the light intensity was physically increased or perceptually increased through brightness enhancement.

Discrimination Learning↗

PubMed2006

Perceived organizational support and perceived external prestige: predicting organizational attachment for university faculty, staff, and administrators.

The present article introduces a social-exchange model of organizational attachment incorporating both direct exchange and indirect exchange. Participants were 325 university employees. The present results indicated that perceived organizational support (POS) and perceived external prestige (PEP) both contribute to organizational attachment. Further, the results showed that the extent to which POS and PEP are related to organizational attachment is moderated by occupational proxies of cosmopolitan-local role orientation. POS was more strongly related to the affective commitment and withdrawal cognitions of staff and administrators than to those of faculty. PEP was more strongly related to affective commitment and withdrawal cognitions of university faculty than to those of university staff and administrators. The authors discussed the need to incorporate relational variables such as PEP into other social-exchange frameworks.

Achievement↗

PubMed1990

Perceived lightness, but not brightness, of achromatic surfaces depends on perceived depth information.

Three experiments were conducted in an attempt to replicate and clarify Gilchrist's (1977, 1980) experiments on the effects of depth information on judgments of achromatic surface color. Gilchrist found that coplanarity, and not retinal adjacency, was the dominant factor in determining achromatic color matches. Because such matches can be made on the basis of either brightness or lightness, we obtained judgments of both qualities. Stereopsis was added to enhance the perceived depth effect of Gilchrist's display, which was otherwise simulated closely on a high-resolution CRT. The results for lightness followed the same pattern as those of Gilchrist, but were smaller in magnitude. This discrepancy may reflect reduced extraneous lighting effects in our displays. Our results therefore agree with related studies in suggesting that lightness matches are based on relationships among coplanar surfaces. Brightness matches, however, were not influenced by perceived depth.

Adult↗