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. 2009 Feb;41(1):99-106.
doi: 10.3758/BRM.41.1.99.

Adaptive Visual Analog Scales (AVAS): A Modifiable Software Program for the Creation, Administration, and Scoring of Visual Analog Scales

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Free PMC article

Adaptive Visual Analog Scales (AVAS): A Modifiable Software Program for the Creation, Administration, and Scoring of Visual Analog Scales

Dawn M Marsh-Richard et al. Behav Res Methods. .
Free PMC article

Abstract

The Adaptive Visual Analog Scales is a freely available computer software package designed to be a flexible tool for the creation, administration, and automated scoring of both continuous and discrete visual analog scale formats. The continuous format is a series of individual items that are rated along a solid line and scored as a percentage of distance from one of the two anchors of the rating line. The discrete format is a series of individual items that use a specific number of ordinal choices for rating each item. This software offers separate options for the creation and use of standardized instructions, practice sessions, and rating administration, all of which can be customized by the investigator. A unique participant/patient ID is used to store scores for each item, and individual data from each administration are automatically appended to that scale's data storage file. This software provides flexible, time-saving access for data management and/or importing data into statistical packages. This tool can be adapted so as to gather ratings for a wide range of clinical and research uses and is freely available at www.nrlc-group.net.

Figures

Figure 1
Figure 1
The Adaptive Visual Analog Scales (AVAS) has a number of parameters that can be manipulated by the experimenter. The program’s startup menu depicts the areas used for adjusting parameters of this versatile software package. These parameters are described in detail in the text.
Figure 2
Figure 2
The “Create a New Scale” function allows for construction of a visual analog scale using anchors and descriptors chosen by the experimenter or administrator.
Figure 3
Figure 3
The “Training” function allows for construction of a customized instruction and practice for a specific VAS.
Figure 4
Figure 4
Figure 4a. During administration of the VAS, the monitor shows a black line with boundary marks, anchors, and a descriptor. The participant is to rate the descriptor at some point between the boundary marks by clicking on the line. Figure 4b. During the DVAS, the monitor shows a descriptive word or phrase accompanied by rating buttons. The participant can click on a rating button to indicate their response selection.
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An example of output from the AVAS

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