Continuous flash suppression
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Continuous flash suppression (CFS) is an adapted version of the original flash suppression method. CFS not only successfully suppresses images, but it strengthens the depth and duration of suppression compared to previous methods, such as flash suppression and binocular rivalry. CFS has the highest magnitude of suppression and allows researchers to increase the suppression time of an image tenfold [1]. Using this method, subjects may report an image presented in their visual field as being invisible for over three minutes. CFS has the longest suppression time compared to binocular rivalry and flash suppression. CFS opens the door to studying preconscious processing mechanisms involved in visual perception [2].
For instance, CFS can be used to measure the salience of an image. For example, using this application, CFS can assist in determining if emotionally salient faces have a shorter suppression time compared to neutral faces. Studies show that there are significant differences in suppression duration depending on the images being suppressed [3]. This illustrates how CFS can be used to more accurately measure the varying strength and perceptual influence of individual visual stimuli.
Tsuchiya and Koch (2006) argue that CFS is not simply a stronger form of binocular rivalry, but is actually a continuous form of flash suppression. The succession of multiple flashes that give CFS its increased suppression capabilities. The duration of stimulus suppression is chiefly dependent on the flash rate of the stimulus [4]. Studies conclude that a series of five stimuli flashes in CFS achieve the full depth of suppression [1]. A unique feature of CFS is its immunity to adaptation [1]. Because the stimulus is flashed repeatedly, CFS prevents the subject from achieving actual conscious awareness of the stimulus.
Mondrian patterns are typically used when conducting CFS experiments. The name comes from Piet Mondrian, an artist who was famous for his use of vertical and horizontal lines. The typical Mondrian pattern used in CFS is comprised of many varied black/grey/white or sometimes multi-colored squares. These Mondrian-scenes are the actual suppressors of the probe stimulus.
Notes
- ^ a b c Tsuchiya, N., et al. (2006) Depth of interocular suppression associated with continuous flash suppression, flash suppression, and binocular rivalry. J Vis 6, 1068-1078
- ^ Yang, E., Zald, D. H., & Blake, R. (2007). Fearful expressions gain preferential access to awareness during continuous flash suppression. Emotion (Washington, D.C.), 7(4), 882-6. doi:10.1037/1528-3542.7.4.882
- ^ Stein, T., & Sterzer, P. (2012) Not Just Another Face in The Crowd: Detecting Emotional Schematic Faces During Continuous Flash Suppression. Emotion. Advance online publication. doi: 10.1037/a0026944
- ^ Wilke, M., et al. (2003) Generalized flash suppression of salient visual targets. Neuron 39, 1043-1052
ECA COMMENTS:--129.10.68.202 (talk) 15:43, 11 April 2012 (UTC)
- Check your citations! For instance, the Yang and Zald 2007 has Blake as an author too! Yang, E., Zald, D. H., & Blake, R. (2007). Fearful expressions gain preferential access to awareness during continuous flash suppression. Emotion (Washington, D.C.), 7(4), 882-6. doi:10.1037/1528-3542.7.4.882
- You will also add links to the citations in wiki text right? The people running the workshop know how to do this.
- I would also say in english what CFS is: showing one thing to one eye, another to the other.......
- Link back to biri and flash suppression page--if this is a different page
- you could put an example mondrian image in--not required though
- you say " CFS has the highest magnitude of suppression" what do you mean by magnitude? If time--stick with time. if you mean something else, you need to say what it is.
- try to write in clear, short, simple language--see my edit above