Early Selection Cherry, Broadbent shadowing task, unattended information not available for subsequent reporting. It was still possible for people to report unattended information. This implied information was not selected early. Late selection - Deutsch suggested instead that selection occurred much later, during response selection. Late Selection Welford, Deutsch, there is a single channel at a stimulus-response translation, or response selection stage of information processing.
People have problems doing two things at once.
When two stimuli are presented one after the other, the response to the 2nd stimulus is delayed while the first one is processed. Exceptions were observed. Note that exceptions to all of the simpler models of attention involved skill exist . We will next consider skill and automatic information processing. Attention and Automaticity Exceptions to simple models of attention involved skill .