Evaluate different techniques for sampling evidence

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Evaluate different techniques for sampling evidence

For more information on this program, please visit the RSD Program web site: RSD uses evidence from early phases of data collection to make design decisions for later phases.

Beginning in the Summer Institute, we will offer a series of eleven one-day short courses in RSD techniques. It is not necessary to be physically in Ann Arbor to participate in these workshops.

Once enrollment is confirmed via email, indicate if course attendance will be in person, in Ann Arbor or via BlueJeans.

Evaluate different techniques for sampling evidence

Survey Methodology for Randomized Controlled Trails does not have the remote participation option. These courses will include: Mick Couper Topics covered: Randomized Controlled Trials RCTs are an important tool for tests of internal validity of causal claims in both health and social sciences.

In practice, however, inattention to crucial details of data collection methodology can compromise the internal validity test.

Evaluate different techniques for sampling evidence

One crucial example is recruitment and retention of participants — though randomized to treatment, unequal reluctance to participate or unequal attrition from the RCT jeopardize the internal validity of comparisons within the RCT design.

Another crucial example is the interaction of treatment and measurement — if the measures themselves change in response to the RCT treatment, then observed treatment and control differences may reflect these measurement differences rather than treatment differences.

In both cases, specific tools from survey methodology can be used to maximize the internal validity test in the RCT design. This course will focus on the survey methodology topics most important for maintaining the internal validity of RCT studies and feature specific examples of applications to RCTs.

One set of tools will focus on maximizing participation and minimizing attrition of participants. Core survey methodology tools for encouraging participation in both pre-treatment measurement and the treatment itself as well as tools for minimizing the loss of participants to follow-up measures will be featured.

These tools include incentives, tailoring refusal conversion, switching modes, and tracking strategies. Links to RSD will also be made. A second set of tools will focus on measurement construction to reduce chances of interaction with treatment. These tools include mode options, questionnaire design issues, and special instruments such as life history calendars to minimize reporting error.

Each portion of the course will feature examples applying each specific tool to RCT studies. This will include discussion of the uncertainty in survey design, the role of paradata, or data describing the data collection process, in informing decisions, and potential RSD interventions.

These interventions include timing and sequence of modes, techniques for efficiently deploying incentives, and combining two-phase sampling with other design changes. Interventions appropriate for face-to-face, telephone, web, mail and mixed-mode surveys will be discussed. Using the Total Survey Error TSE framework, the main concepts behind these designs will be explained with a focus on how these principles are designed to simultaneously control survey errors and survey costs.

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Examples of RSD in both large and small studies will be provided as motivation. Small group exercises will help participants to think through some of the common questions that need to be answered when employing RSD.

The instructors will then provide independent examples of the implementation of RSD in different international surveys. All case studies will be supplemented with discussions of issues regarding the development and implementation of RSD.

This variety of case studies will reflect a diversity of survey conditions. The NSFG West is a cross-sectional survey that is run on a continuous basis with in-person interviewing. The RDSL Axinn is a panel survey that employed a mixed-mode approach to collecting weekly journal data from a panel of young women.

The UMCC survey is a web survey of students at UM that employed multiple modes of contact across the phases of the design.

The Netherlands Survey of Consumer Satisfaction Schouten is a mixed-mode survey combining web and mail survey data collection with telephone interviewing. The focus of the course will be on practical tools for implementing RSD in a variety of conditions, including small-scale surveys.

William Axinn and Stephanie Coffey Topics covered: Web surveys can be an inexpensive method for collecting data.

This is especially true for designs that repeat measurement over several time periods. However, these relatively low-cost data collections may result in reduced data quality if the problem of nonresponse is ignored. This course will examine methods for using RSD to effectively deploy scarce resources in order to minimize the risk of nonresponse bias.The atmosphere is a carrier on which some natural and anthropogenic organic and inorganic chemicals are transported, and the wet and dry deposition events are the most important processes that remove those chemicals, depositing it on soil and water.

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A wide variety of different collectors were tested to evaluate site-specificity, seasonality and daily variability of settleable particle.

A field of applied statistics of human research surveys, survey methodology studies the sampling of individual units from a population and associated techniques of survey data collection, such as questionnaire construction and methods for improving the number and accuracy of responses to surveys.

Survey methodology includes instruments or procedures that ask one or more questions that may or. Evaluate different techniques for sampling evidence of assessment, including use of technology: There are different techniques for sampling the evidence of learners work such as the vertical sampling (identical elements from different assessors and horizontal sampling which means that a specific piece of all units over the course of time is /5(1).

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6 Methods of data collection and analysis Keywords: Qualitative methods, quantitative methods, research, sampling, data analysis. 6 Methods of data collection and analysis 2 Introduction tranceformingnlp.com familiar with different methods for collecting and analysing qualitative data.

There are a wide variety of techniques used for sampling the evidence of assessment which are all valuable for different reasons. Below are listed these different techniques a) Direct observation is the best way to evaluate the assessor’s ability to carry out a fair and valid assessment.

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