... message had meant and couldn't repeat it at all but could tell the sex and intensity of the voice they had heard. These findings influenced the theory of attention proposed by Broadbent. According to Broadbent our information processing system has a limited capacity and therefore needs a filter to prevent an overload of too much information. He suggested that the brain temporarily retains information about all stimuli but that the information fades and disappears if it isn't selected for further processing through being permitted to pass the filter. This early filtering theory related to Cherry's work as the filter selects the message to be shadowed and not the other; hence no information about it is processed. However, the more people looked into Broadbent's work the more problems for the filter theory began to arise. Treisman (1964) responded to some of these problems that were becoming apparent by proposing an attenuation ...

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