Department for the Psychology of Human Movement and Sport, Institute of Sport Science, Friedrich Schiller University Jena, Germany.
Perception. 2021 Jan;50(1):69-79. doi: 10.1177/0301006620982212.
When displayed in slow motion, actions are often perceived longer compared with original speed. However, it remains to be determined why this bias exists. Is it possible that the bias emerges because participants underestimate the factor by which a video was slowed down and hence arrive at erroneous conclusions about the original duration? If true, providing explicit information about the respective video speed should eliminate this slow motion effect. To scrutinize the nature of this bias, participants rated the original duration of sports actions displayed at original speed or slow motion. Results revealed the expected overestimation bias consisting in longer ratings with increasing slow motion. However, the bias disappeared when information about the current video speed was provided. The observations suggest an influence of knowledge about video playback speed on cognitive-evaluative processes which may hold important implications for future research and practice.
当以慢动作播放时，动作通常会被感知为比原始速度更长。然而，目前还不清楚为什么会存在这种偏差。是否有可能因为参与者低估了视频被放慢的倍数，从而对原始持续时间得出错误的结论，导致了这种偏差的存在？如果是这样，提供有关相应视频速度的明确信息应该可以消除这种慢动作效应。为了仔细研究这种偏差的本质，参与者对以原始速度或慢动作播放的体育动作的原始持续时间进行了评分。结果显示，随着慢动作的增加，出现了预期的高估偏差，即评分更高。然而，当提供当前视频速度的信息时，偏差就消失了。这些观察结果表明，对视频播放速度的了解会对认知评估过程产生影响，这可能对未来的研究和实践具有重要意义。
