Effects of Display and Response Codes on Information Processing in anIdentification Task (Final Report)

摘要

Four experiments are reported that employ the Within-Task Subtractive (WiTS)method for partitioning response time. The assumptions and advantages of this methodology are discussed relative to subtractive and additive factors methodology. Code and coding issues such as the particular target-task combination used, response mapping, target density, and blocks were manipulated. Study (1) showed that digits were processed differently from letters in terms of input and output processing. Study (2) showed that the identification of different categories of codes in the presence of noise codes generated different effects on input and output processing. Study (3) examined the identification of codes from multiple code categories when there is a single code per target versus when there are multiple codes per target. The results show that while there are differences in input processing depending on the location of codes, when the results are considered on a per-code basis, the differences in input are accounted for by the different number of visual fixations required, rather than differences in processing. Study (4) examined the effects of identifying redundant codes. Redundant codes were processed as separate codes early in practice, and processed as a single, composite code late in practice during input, and were output much faster than relevant, non-redundant codes in output.