Characteristics of letter recognition for single letter presentation are already known for evaluation of dotted patterns displayed on CRT. In a real situation of VDT works, VDT operators can use context in visual recognition processes. The purpose of this research is to clarify some characteristics on the recognition process, especially when using context, for displayed patterns. The characteristics on accuracy of processing and recognition time were evaluated.
For this purpose, two experiments were performed with ten male subjects. In these experiments, two types of upper-case character strings were used as examples of visual information containing context. One is correctly spelled English words, and the other being misspelled words.
The results of the experiments clarified the effect of displayed pattern on the accuracy of recognition. In addition, the effect of context in the recognition process was also confirmed. For example, in the recognition process using context, one may tend to recognize a misspelled word as a correctly spelled word. Finally, as an application of this research, guidelines of generation of dotted pattern displayed on CRT are proposed.
View full abstract