Lab Report
The Effects of Individuals’ Detection of Changes in Images on Reaction Time
Abstract
The purpose of this current study was to examine how individuals detected or noticed change when viewing images on their level of attentiveness. The experiment consisted of 22 participants who had to detect change across conditions for 20 minutes. These conditions were importance of change (marginal and central) and change type (color, location and disappearance and reappearance of images). These changes were presented in random order with two practice trials followed by 46 trials. The participants were exposed to all of the conditions making this experiment a within-subjects experiment. It was hypothesized that individuals would take a longer time to detected marginal changes than central change. Participants had to look at two pictures presented simultaneously and decide what changes were presented. When changes were detected the participants had to identified if the changes were color, location, or disappearance or reappearance of images within a certain time frame. It was predicted that change detection for marginal change would take a longer time to be noticed. The average mean reaction time for marginal change was longer than central change. In conclusion central change is easier to notice than marginal change.
The Effects of Individuals’ Detection of Changes in Images on Reaction Time
In the research article Rensink, Regan & Clark (1997) argues that the key factor is attention. The researchers proposed that visual perception of a change in a scene occurs only when focused attention is given to the part being changed. Changes can be easily identified when objects are important in the scene. Change blindness has been encountered in two different experimental paradigms. The first was concerned with visual memory, which was used to detect changes in short presentation of figures or letters. The second
Abstract
The purpose of this current study was to examine how individuals detected or noticed change when viewing images on their level of attentiveness. The experiment consisted of 22 participants who had to detect change across conditions for 20 minutes. These conditions were importance of change (marginal and central) and change type (color, location and disappearance and reappearance of images). These changes were presented in random order with two practice trials followed by 46 trials. The participants were exposed to all of the conditions making this experiment a within-subjects experiment. It was hypothesized that individuals would take a longer time to detected marginal changes than central change. Participants had to look at two pictures presented simultaneously and decide what changes were presented. When changes were detected the participants had to identified if the changes were color, location, or disappearance or reappearance of images within a certain time frame. It was predicted that change detection for marginal change would take a longer time to be noticed. The average mean reaction time for marginal change was longer than central change. In conclusion central change is easier to notice than marginal change.
The Effects of Individuals’ Detection of Changes in Images on Reaction Time
In the research article Rensink, Regan & Clark (1997) argues that the key factor is attention. The researchers proposed that visual perception of a change in a scene occurs only when focused attention is given to the part being changed. Changes can be easily identified when objects are important in the scene. Change blindness has been encountered in two different experimental paradigms. The first was concerned with visual memory, which was used to detect changes in short presentation of figures or letters. The second
References: Cole G.G, Kentridge R.W & Heywood C.A (2004). Visual salience in the change detection paradigm: The special role of object onset. Journal of experimental psychology: Human perception and performance, 30, 464-477. Levin D.T & Simons D.J (1997). Failure to detect changes to attended objects in motion pictures. Psychonomic Bulletin & Review, 4, 501-506. Rensink R.A, O’Regan J.K.& Clark J.J (1997). To see or not to see: The need for attention to perceive changes in scenes. Psychological Science, 8, 368-373.