The sensitivity and reproducibility of the results are broadly very similar, although the VAS may outperform the other scales in some cases.
[1][2] These advantages extend to measurement instruments made up from combinations of visual analogue scales, such as semantic differentials.
It is a visual analogue scale (like VAS) that cover two constructs: worry and fear.
They indicate their feeling and respond by placing a mark on the lines with the anchor words “calm/worried” and “no fear/strong fear”.
[9] Later on, FOBS, was then developed and tested based on Rouhe’s research in pregnant women in both Sweden and Australia.