Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Ana Villar is active.

Publication


Featured researches published by Ana Villar.


Social Science Computer Review | 2013

Where Am I? A Meta-Analysis of Experiments on the Effects of Progress Indicators for Web Surveys

Ana Villar; Mario Callegaro; Yongwei Yang

The use of progress indicators seems to be standard in many online surveys. Researchers include them in surveys in the hope they will help reduce drop-off rates. However, there is no consensus in the literature regarding their effects. In this meta-analysis, we analyzed 32 randomized experiments comparing drop-off rates of an experimental group who completed an online survey in which a progress indicator was shown to drop-off rates of a control group to whom the progress indicator was not shown. In all the studies, a drop-off was defined as a discontinuance of the survey (at any point) after it has begun, resulting in failure to complete the survey. Three types of progress indicators were analyzed: constant, fast-to-slow, and slow-to-fast. Our results show that, overall, using a constant progress indicator does not significantly help reduce drop-offs and that effectiveness of the progress indicator varies depending on the speed of indicator: Fast-to-slow indicators reduced drop-offs, whereas slow-to-fast indicators increased drop-offs. We also found that among the studies in which a small incentive was promised, showing a constant progress indicator increased the drop-off rate. These findings question the common belief that progress indicators help reduce drop-off rates.


Archive | 2008

Translation procedures and translation assessment in the World Mental Health Survey Initiative.

Janet Harkness; B. E. Pennell; Ana Villar; N. Gebler; S. Aguilar-Gaxiola; I. Bilgen; R. C. Kessler; T. B. Üstün


Archive | 2010

Translation, Adaptation, and Design

Janet Harkness; Ana Villar; Brad Edwards


Climatic Change | 2011

Global warming vs. climate change, taxes vs. prices: Does word choice matter?

Ana Villar; Jon A. Krosnick


Online Panel Research: A Data Quality Perspective | 2014

A critical review of studies investigating the quality of data obtained with online panels based on probability and nonprobability samples1

Mario Callegaro; Ana Villar; David S. Yeager; Jon A. Krosnick


2011/13 | 2011

Combining landline and mobile phone samples A dual frame approach

Mario Callegaro; Öztas Ayhan; Siegfried Gabler; Sabine Haeder; Ana Villar


Archive | 2014

A Critical Review of Studies Investigating the Quality of Data Obtained With Online Panels

Mario Callegaro; Ana Villar; Jon A. Krosnick; David S. Yeager


Archive | 2018

Overview of Questionnaire Design and Testing

Julie A.J. de Jong; Brita Dorer; Sunghee Lee; Ting Yan; Ana Villar


Archive | 2014

Assessing Translated Questions via Cognitive Interviewing

Alisú Schoua‐Glusberg; Ana Villar


Archive | 2014

Assessing Translated Questions via Cognitive Testing

A. Schoua-Glusberg; Ana Villar

Collaboration


Dive into the Ana Villar's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar

David S. Yeager

University of Texas at Austin

View shared research outputs
Top Co-Authors

Avatar

Janet Harkness

University of Nebraska–Lincoln

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Sunghee Lee

University of Michigan

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge