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Related Experiment Video

Updated: May 22, 2026

Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment
07:01

Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment

Published on: September 20, 2020

The effect of reminders in a web-based intervention study.

Madeleine Svensson1, Tobias Svensson, Andreas Wolff Hansen

  • 1Unit of Clinical Epidemiology, T2, Department of Medicine, Karolinska Institutet, 171 76 Stockholm, Sweden. Madeleine.Svensson@ki.se

European Journal of Epidemiology
|April 26, 2012
PubMed
Summary

Frequent reminders significantly boost participation in web-based epidemiological studies. Targeted reminder strategies, especially for office workers, improve response rates, with September showing the greatest increases.

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Last Updated: May 22, 2026

Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment
07:01

Working Memory Training for Older Participants: A Control Group Training Regimen and Initial Intellectual Functioning Assessment

Published on: September 20, 2020

Area of Science:

  • Epidemiology
  • Health Informatics
  • Behavioral Science

Background:

  • Effective strategies for encouraging participation in web-based epidemiological research are not well-established.
  • Understanding factors influencing response rates in online health studies is crucial for data validity.

Purpose of the Study:

  • To investigate the impact of various reminder strategies on participation rates in a web-based epidemiological study.
  • To identify optimal reminder frequencies and types for maximizing participant engagement.

Main Methods:

  • A web-based lifestyle questionnaire was administered to 3,876 employees, with varying numbers of email and additional reminders (media, flyers, SMS).
  • Participation was analyzed based on participant characteristics, reminder type/quantity, and timing.
  • Reminder strategies were categorized into low (≤6), medium (7-9), and high (>9) amounts.

Main Results:

  • Response rates increased by 15% with 4-5 email reminders and 21% with 11 email reminders.
  • Medium reminder amounts yielded the highest overall response rate (75%).
  • High reminder amounts were particularly effective for office workers, increasing their response rate significantly compared to field workers.

Conclusions:

  • Frequent reminders are effective in enhancing response rates for web-based epidemiological research, particularly for individuals with high internet access.
  • Tailoring reminder strategies, such as using high amounts for office workers, can further optimize participation.
  • Participant characteristics did not influence the timing of their response in this study.