■我们调查了自然主义行为识别和理解的潜在因素,以及识别失败期间发生的错误。
■参与者看到了在三种不同条件下呈现的十个不同全身动作的全光刺激:作为正常视频,随着具有帧的时间顺序的视频加扰,并作为单个静态代表帧。在每个刺激演示参与者完成两个任务中的一个之后——一个强制选择任务,他们被赋予十个潜在的动作标签作为选项,或免费描述任务,他们可以用自己的话描述每个刺激中的动作。
■虽然通常,形式的组合,动议,时间信息导致了最高的行动理解,对于某些动作,形式信息足够,添加运动和时间信息并不能提高识别准确性。我们还分析了动作识别中的错误,主要发现了两种不同的类型。
■一种错误是在语义层面,而另一个则是在没有任何语义归属的情况下恢复到身体部位处理的运动学水平。我们在自然主义行为感知的背景下详细阐述了这些结果。
UNASSIGNED: We investigated the factors underlying naturalistic action recognition and understanding, as well as the errors occurring during recognition failures.
UNASSIGNED: Participants saw full-light stimuli of ten different whole-body actions presented in three different conditions: as normal videos, as videos with the temporal order of the frames scrambled, and as single static representative frames. After each stimulus presentation participants completed one of two tasks-a forced choice task where they were given the ten potential action labels as options, or a free description task, where they could describe the action performed in each stimulus in their own words.
UNASSIGNED: While generally, a combination of form, motion, and temporal information led to the highest action understanding, for some actions form information was sufficient and adding motion and temporal information did not increase recognition accuracy. We also analyzed errors in action recognition and found primarily two different types.
UNASSIGNED: One type of error was on the semantic level, while the other consisted of reverting to the kinematic level of body part processing without any attribution of semantics. We elaborate on these results in the context of naturalistic action perception.