Evidence provided by Weir and Smith, particularly the findings from the National Health and Nutrition Examination Survey (NHANES), leads us to conclude that an increase in arthritis prevalence during the 1990s in the United States is probable, but the trend is likely overstated in the Health and Retirement Study (HRS). We show that a mistake in our earlier method does not change substantively o...

OBJECTIVE To document the ability of public health laboratories to respond to radiological emergencies. METHODS The Association of Public Health Laboratories developed, distributed, and analyzed two separate surveys of public health laboratories representing the 50 US states and major nonstate jurisdictions. The 2009 All-Hazards Laboratory Preparedness Survey examined overall laboratory capab...

test the psychometric properties of the persian version of the perception of psychiatry survey questionnaire, which is being used in a large multi-site international study, of which we were part. this instrument was designed to measure the attitudes of medical educators to psychiatry.we used world health organization guideline as the methodological model for persian translation. the persian ver...

BACKGROUND Patient reported outcome measures used in studies of psoriatic arthritis (PsA) have been found to be inadequate for determining the impact of the disease from the patient's perspective. OBJECTIVE To produce the PsAQoL, a PsA-specific quality of life (QoL) instrument, employing the needs based model of QoL that would be relevant and acceptable to respondents, valid, and reliable. ...

The Medicare Beneficiary Health Status Registry (MBHSR) is a proposed new survey program that would collect health status indicators annually from large probability samples of Medicine beneficiaries. For reasons of economy, the MBHSR would use mail survey procedures with telephone follow-up of nonrespondents. Because of concerns about response rates and the validity and reliability of the data ...

Combination strategies are test case selection methods that identify test cases by combining values of the different test object input parameters based on some combinatorial strategy. This survey presents 16 different combination strategies, covering more than 40 papers that focus on one or several combination strategies. This collection represents most of the existing work performed on combina...

Test-taker’s capability to answer questions is influenced by available cognitive resources for problem solving. Due to the limited working memory capacity, excessive cognitive load for interpreting instruction would impact test-taker’s constructrelevant process and test validity. Especially in STEM assessment where multimedia and interactive design are widely used, test-takers can easily get ov...

We have extended and improved the statistical test recently developed by Rauzy for assessing the completeness in apparent magnitude of magnitude-redshift surveys. Our improved test statistic retains the robust properties – specifically independence of the spatial distribution of galaxies within a survey – of the Tc statistic introduced in Rauzy’s seminal paper, but now accounts for the presence...

The effective tax on earnings embodied in the Social Security retirement earnings test has been as high as 50 percent. Despite numerous empirical studies, there is surprisingly little agreement about whether the earnings test affects male labor supply. In this paper, we provide a comprehensive analysis of the earnings test for men using longitudinal administrative earnings data and more commonl...