CAJ | 학술논문

人们主观上认为形象图标容易识别，然而以反应时为指标的行为实验发现，随着熟悉度增加，形象优势逐渐消失。本研究采用事件相关电位（ERPs）技术，记录分析了17名熟练用户在识别图标时的识别电位（RP）。结果显示：图标形象度对RP在潜伏期无显著差异，但形象图标反应时比抽象图标短，且形象图标的RP波幅显著小于抽象图标。这一结果说明识别形象图标在类别分拣进程中处理的特征信息量较抽象图标少。
인문주관상인위형상도표용역식별，연이이반응시위지표적행위실험발현，수착숙실도증가，형상우세축점소실。본연구채용사건상관전위（ERPs）기술，기록분석료17명숙련용호재식별도표시적식별전위（RP）。결과현시：도표형상도대RP재잠복기무현저차이，단형상도표반응시비추상도표단，차형상도표적RP파폭현저소우추상도표。저일결과설명식별형상도표재유별분간진정중처리적특정신식량교추상도표소。
An ERP experiment was conducted with the purpose of exploring how icon concreteness impacts the recognition process. Recognition Potential （RP） is an early event related potential （ERP） that occurs when subjects see recognizable stimuli. Icon con creteness was defined to be the extent to which icons pictorially represent objects, places or people. Concrete icons are designed to look like the objects in the real world, for example, a printer, a disc, and a stamp. In contrast, abstract icons are likely to use symbols or geometric constructs that do not have real world references, such as arrows, shapes and punctuation marks. Self report studies found that people consider concrete icons easier to interpret. However, the priority of concrete icons in subjective preference is not always re fleeted in behavioral experiments. 17 experienced GUI users participated in the research. We adopted a Rapid Stream Stimulation （RSS） paradigm, a method considered to be helpful in evoking RPs. Stimuli were displayed with a stimulus onset asynchrony （SOA） of 250 ms. Test stimuli and control stimuli were presented periodically, after about six or seven background stimuli. The subjects were instructed that, during the experiment, they should press a key as rapidly as possible when detecting an icon. The first recording se quence begins after two trial sequences. An E prime program was used to determine the order of stimulus presentation, to control rest time between sequences, and collect behavior reaction data. During the experiment, stimuli were presented in the center of a 17 inch Dell display. The subjects＇behavioral data were first exported to Excel for pretreatment. EEG data were recorded from a 128 channel Geodesic Sensor Net with KC1 electrodes and analyzed by a Geodesic Photogrammetry System （Electrical Geodesics Ins. , Eugene, OR, USA）. The RP amplitude and latency were measured at a 180 350 ms time window through a group of electrodes in the bilateral inferi or parieto occipital areas （P1, PS, 01, PO3, PO7, P2, P6, PO8, PO4 and O2） for each subject. The static data were exported to SPSS for further analysis. Results showed that ： 1 ） there was a very significant difference in the RP amplitude for concrete, medium and abstract icons, F（9, 48~J） = 27. 82, p 〈. 001, 2 =. 769, observed power = 1. 000. The more concrete the icon is, the smaller the RP it evokes. Our finding suggests that less effort was involved during the intermediate visual representations that integrated information from various pathways and then achieved particular form analysis for concrete icons than for abstract icons. 2） The RT was slightly but significantly shorter for concrete icons than for abstract icons, F（2, 48） = 14. 854, p 〈. 001, 2 =. 481, observed power =. 998. But concreteness did not have a significant effect on the RP latency, F（18, 480） = 1. 123, p 〉. 05, n2 =. 063, observed power =. 776. The psychological mechanism behind this phenomenon is discussed. According to the results, icons that depict real world objects can save the cognitive energy of users even though they are experienced.