Scientists had a very early interest in unconscious processing (also called implicit or subliminal perception ). We know that there can be perception without consciousness. People can think for themselves that they have not perceived anything consciously, while their behavior shows that they have observed something.We do not assume that we have two selves: one for conscious processing and one for unconscious processing. In earlier experiments, conscious experiences were defined in terms of what people themselves said they had observed. This sounds logical, but this method has a disadvantage. Whether someone says that he or she has perceived something consciously depends on how careful someone is with his or her judgment. There is no clear limit to indicate between when someone has observed something or not. Behaviorists did not want to be dependent on whether people said they had observed something. They wanted to make objective measuring instruments so that there was no need for them. This is a strange idea, since saying whether you have observed something,is as reliable (or unreliable) as pressing a button to make it clear that you have observed something. Marcel showed that people react faster to a target if the prime matches this. Marcel made the primes unrecognizable to participants by placing a visual distractor on the image immediately after the prime appeared. People could not consciously perceive the prime. Even so, the target was reacted even faster. This phenomenon is also called ' semantic priming' .Cheesman and Merikle distinguished between:objective threshold value, andsubjective threshold value.The objective threshold value represents the level of detection in which a distinction is made between perceptual information on the basis of random phenomena. The subjective threshold value is about the...


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