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A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
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Subliminal perception refers to the processing of sensory information that occurs below the level of conscious awareness. Researchers study subliminal perception by presenting a stimulus, such as a word or image, very quickly, typically around 50 milliseconds. This rapid presentation is often followed by another stimulus, such as a pattern of dots or lines, which blocks further mental processing of the initial stimulus. As a result, if participants cannot identify the initial stimulus better...
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Slow motion increases perceived intent.

Eugene M Caruso1, Zachary C Burns2, Benjamin A Converse3

  • 1Booth School of Business, University of Chicago, Chicago, IL 60637; ecaruso@chicagobooth.edu.

Proceedings of the National Academy of Sciences of the United States of America
|August 3, 2016
PubMed
Summary
This summary is machine-generated.

Viewing actions in slow motion can lead to the perception of greater intent, a phenomenon known as the slow motion intentionality bias. This bias influences judgments of harmful actions, even when viewers know the actual time elapsed.

Keywords:
egocentrismintentlawslow motiontime

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Area of Science:

  • Cognitive psychology
  • Legal psychology
  • Media psychology

Background:

  • Judgments of harmful actions often rely on inferring transgressor intent.
  • Video evidence, particularly in slow motion, is increasingly used in legal and media contexts to assess intent.

Purpose of the Study:

  • To investigate the impact of slow motion video on the perception of intentionality.
  • To understand the mechanisms underlying the slow motion intentionality bias.
  • To explore mitigation strategies for this bias.

Main Methods:

  • Eight experiments (total n = 4,347) were conducted using real surveillance footage and broadcast replays.
  • Participants viewed actions at regular speed versus slow motion.
  • Some experiments included viewing both regular and slow motion replays.

Main Results:

  • Viewing actions in slow motion significantly increased the perception of intentionality compared to regular speed.
  • This bias is partly due to the subjective feeling that the actor had more time to act.
  • Presenting both regular and slow motion replays reduced but did not eliminate the bias.

Conclusions:

  • Slow motion video can distort the perception of intent, creating a 'slow motion intentionality bias'.
  • This bias has implications for legal decision-making and media portrayals.
  • Empirical understanding of this perceptual effect is crucial for objective judgment.