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Related Concept Videos

Surveys02:16

Surveys

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Often, psychologists develop surveys as a means of gathering data. Surveys are lists of questions to be answered by research participants, and can be delivered as paper-and-pencil questionnaires, administered electronically, or conducted verbally. Generally, the survey itself can be completed in a short time, and the ease of administering a survey makes it easy to collect data from a large number of people.
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Information is everywhere and its presentation—such as how and when items are presented—can impact our perceptions and decisions surrounding the info. This broad concept umbrellas framing effects—influences that occur due to the way information is framed in its appearance, whether it’s purely the order or the specific wording of a message. Let’s take a look at numerous ways in which two versions of something can objectively say the same thing, yet we respond in...
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Frames01:30

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Frames are essential components of various mechanical and structural systems used daily. These structures are known for their stability and ability to bear heavy loads. A frame is constructed using two-force and multi-force members, interconnected using pin joints. In contrast, trusses are made entirely of two-force members.
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Surveying is the art and science of mapping the earth's surface. It involves measuring distances, angles in horizontal or vertical directions, and levels to understand the shape and size of land features. Surveying techniques are essential for various tasks, such as identifying the levels of a land area with reference to a specific point, and mapping undulations and water bodies.There are two main types of surveying: plane surveys and geodetic surveys. Plane surveys assume the earth is flat,...
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Consider a hydraulic hoist supporting a load of 1 kN. Assuming a simplified schematic representation of this frame structure, the force acting on BD and BF members can be determined.
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Frames: Problem Solving I01:24

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Consider a jib crane with an external load suspended from the pulley. The dimensions of the crane members are shown in the figure. A systematic analysis of the frame structure is required to determine the reaction forces at the pin joints, assuming that the pulleys are frictionless.
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Related Experiment Video

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Frame-by-Frame Video Analysis of Idiosyncratic Reach-to-Grasp Movements in Humans
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Optimum allocation for a dual-frame telephone survey.

Kirk M Wolter1, Xian Tao1, Robert Montgomery1

  • 1NORC at the University of Chicago, 55 East Monroe Street, Suite 3000, Chicago, IL 60603.

Survey Methodology
|March 10, 2018
PubMed
Summary
This summary is machine-generated.

Designing dual-frame random digit dial (RDD) telephone surveys involves choosing between screening cell-phone only households or including all cell-phone users. This study offers a framework to optimize sample allocation and mixing parameters for cost-effective, precise survey designs.

Keywords:
Dual-frame surveysNational Immunization SurveyOptimum allocationSample design

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Area of Science:

  • Survey Methodology
  • Statistical Sampling
  • Public Health Research

Background:

  • Designing dual-frame random digit dial (RDD) telephone surveys presents complex choices impacting study outcomes.
  • Key decisions involve how to handle cell-phone samples, specifically screening for cell-phone only (CPO) households versus including all cell-phone users.
  • These choices influence survey cost, precision, and overall coverage.

Purpose of the Study:

  • To present a framework for evaluating tradeoffs between different cell-phone sampling strategies in dual-frame RDD surveys.
  • To introduce a method for selecting the optimal survey design based on study goals.
  • To determine the optimal allocation of sample size across sampling frames and the optimal mixing parameter for dual-user domains.

Main Methods:

  • Derivation and discussion of optimal sample size allocation between landline and cell-phone frames.
  • Exploration of the optimal mixing parameter (p) for the dual-user domain.
  • Illustration of the proposed methods using data from the National Immunization Survey.

Main Results:

  • A systematic framework is provided to analyze the cost-precision-coverage tradeoffs inherent in dual-frame RDD survey design.
  • Methods for optimizing sample allocation and the mixing parameter are derived and discussed.
  • The application to the National Immunization Survey demonstrates the practical utility of the proposed approach.

Conclusions:

  • The study provides a robust methodology for optimizing dual-frame RDD telephone survey designs.
  • Informed decisions regarding cell-phone sample handling can lead to more efficient and precise survey data collection.
  • The presented framework aids researchers in achieving study objectives while managing resources effectively.