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Related Concept Videos

Surveys02:16

Surveys

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.
Longitudinal Research02:20

Longitudinal Research

Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
Assumptions of Survival Analysis01:15

Assumptions of Survival Analysis

Survival models analyze the time until one or more events occur, such as death in biological organisms or failure in mechanical systems. These models are widely used across fields like medicine, biology, engineering, and public health to study time-to-event phenomena. To ensure accurate results, survival analysis relies on key assumptions and careful study design.
Sample Size Calculation01:19

Sample Size Calculation

Knowledge of the sample size is the first requirement to conduct random sampling or an experiment. The sample size is the total number of units, observations, or groups (in some cases) used to get the data to estimate a population parameter. As the name suggests, the sample size is that of the sample drawn from the population and differs from the population size.
The sample size for the given experiment or sampling effort is fundamental to any study design. Sample size decides the number of...
Chunking and Rehearsal in Sensory Memory01:22

Chunking and Rehearsal in Sensory Memory

Improving short-term memory can be achieved through techniques like chunking and rehearsal. Chunking involves organizing information into larger, more manageable units. This technique is particularly useful for information that exceeds the typical memory span of between five and nine items. For instance, logging into an online account with a password like "ta89vq0179gz" involves grouping letters and numbers into three chunks—ta89, vq01, and 79gz. It makes large amounts of information more...
Group Design02:01

Group Design

The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between the two are due to...

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Related Experiment Video

Updated: Jul 3, 2026

A Cross-Disciplinary and Multi-Modal Experimental Design for Studying Near-Real-Time Authentic Examination Experiences
08:33

A Cross-Disciplinary and Multi-Modal Experimental Design for Studying Near-Real-Time Authentic Examination Experiences

Published on: September 4, 2019

Optimal recall length in survey design.

Philip M Clarke1, Denzil G Fiebig, Ulf-G Gerdtham

  • 1School of Public Health, The University of Sydney, NSW 2006, Australia. philipc@health.usyd.edu.au

Journal of Health Economics
|August 1, 2008
PubMed
Summary

Economists use survey data, but recall periods cause errors. This study presents a statistical framework to balance information gain and recall error, optimizing survey design for better economic research.

Area of Science:

  • Economics
  • Survey Methodology
  • Health Services Research

Background:

  • Self-reported survey data are crucial for economic research.
  • Recall error in survey data arises from respondents' memory limitations.
  • Survey designers face a trade-off between recall period length and data accuracy.

Purpose of the Study:

  • To develop a statistical framework for analyzing the trade-off between recall period length and measurement error in surveys.
  • To provide a method for estimating optimal recall periods in economic surveys.
  • To improve the quality of self-reported data used in economic research.

Main Methods:

  • Utilized a statistical framework to model the relationship between recall period and data accuracy.
  • Employed hospital utilization data from Sweden's Survey of Living Conditions for illustration.

Related Experiment Videos

Last Updated: Jul 3, 2026

A Cross-Disciplinary and Multi-Modal Experimental Design for Studying Near-Real-Time Authentic Examination Experiences
08:33

A Cross-Disciplinary and Multi-Modal Experimental Design for Studying Near-Real-Time Authentic Examination Experiences

Published on: September 4, 2019

  • Analyzed the impact of varying recall periods on data quality.
  • Main Results:

    • Demonstrated a quantifiable trade-off between the length of the recall period and the extent of recall error.
    • Showcased the application of the statistical framework using real-world survey data.
    • Identified optimal recall period lengths based on data characteristics.

    Conclusions:

    • The choice of recall period significantly impacts the reliability of survey data in economic studies.
    • The proposed statistical framework offers a robust method for optimizing survey design.
    • Accurate recall period estimation can enhance the validity of economic research findings.