Forsta：2021年最佳实践调查滑块设计报告（英文版）

Showing an initial value or position on a slider can confuserespondents as it appears that an answer has already been given.If the initial state indicates a 'O' on the scale, there may not be away to distinguish that from a non-answer (where the respondentchooses to ignore the question and leave the slider as is.)In this example, the initial state of the slider shows a highlightedarrow, indicating some action to be taken with it. No starting valueis given in the initial state.