Accuracy and precision of responses to visual analog scales: Inter- and intra-individual variability.

ABSTRACT: Visual analog scales (VASs) are gaining popularity for collecting responses in computer administration of psychometric tests and surveys. The VAS format consists of a line marked at its endpoints with the minimum and maximum positions that it covers for respondents to place a mark at their selected location. Creating the line with intermediate marks along its length was discouraged, but no empirical evidence has ever been produced to show that their absence does any good. We report a study that asked respondents to place marks at pre-selected locations on a 100-unit VAS line, first when it only had numerical labels (0 and 100) at its endpoints and then when intermediate locations (from 0 to 100 in steps of 20) were also labeled. The results show that settings are more accurate and more pre

SUBMITTER: Garcia-Perez MA 

PROVIDER: S-EPMC10700476 | biostudies-literature | 2023 Dec

REPOSITORIES: biostudies-literature