42. When Jaxon stares at a red object for a period of time and then looks at a white surface, she sees a green afterimage of the red object. This phenomenon is best explained by
Answer: A
Jaxon's perception of a green afterimage is best explained by the opponent-process theory.
The opponent-process theory explains how color perception is influenced by opposing pairs of colors. When Jaxon stares at a red object, the red receptors in her eyes become desensitized, and when she shifts her gaze to a white surface, the opposing color (green) becomes prominent in her visual perception.
A) the opponent-process theory
This option accurately describes the phenomenon observed by Jaxon. According to the opponent-process theory, colors are perceived in terms of opposing pairs: red-green, blue-yellow, and black-white. Staring at a red object fatigues the red receptors, leading to the perception of green when the stimulus is removed, which perfectly explains Jaxon’s experience.
B) the trichromatic theory
The trichromatic theory posits that color perception is based on the activation of three types of cone cells in the retina (red, green, and blue). While this theory explains how colors are initially detected, it does not account for the afterimage effect that Jaxon experiences, as it does not involve the opposing color mechanism.
C) the gate-control theory
This theory primarily relates to the perception of pain and how it is modulated within the nervous system. It does not apply to color perception or the phenomenon of afterimages, making this option irrelevant to Jaxon's situation.
D) Weber's law
Weber's law deals with the perception of changes in stimulus intensity rather than color perception itself. It does not explain the afterimage effect that occurs when transitioning from a colored object to a white surface, thus making this option incorrect.
Conclusion
The opponent-process theory is definitively the correct explanation for Jaxon's experience of seeing a green afterimage after staring at a red object. Other options, such as the trichromatic theory, gate-control theory, and Weber's law, do not adequately address the phenomenon and therefore fail to provide a satisfactory explanation.