Shaped Sign Recognition Of The Brain Function Of Lateralization: The Sound Next To The Left In The Right Word With The Effect

The study used Chinese pictophonetic characters with left (PS characters) and right (SP characters) phonetic radicals as experimental stimulus to explore the effect of phonetic radical position on the recognition of pictophonetic characters and whether the effect is different between the left and right hemispheres. The study controlled positions of phonetic radicals, frequency and regularity of the stimulus characters. Experiment task were lexical decision task (experiment1) and naming task (experiment2). The study used a new paradigm of lateralization study, in which the target stimuli was displayed at fixation and a flashing distractor was displayed in one visual field to guarantee only one hemisphere can process the target stimuli.The results of experiment1showed that:a) for characters, the average reaction time was shorter with distractor on the left than on the right. b) for both of pseudo-characters and characters, the average error rates with distractor on the left and on the right were not significantly different. c) reversed regularity effect and a matching form of SP characters-left distractor and PS characters-right distractor were shown.The results of experiment2showed that:a) the average error rates but not the average reaction times were significantly higher with distractor on the right than on the left. b) an interaction effect of phonetic radical position by frequency by regularity was found, the average naming times of high-frequency regular and unregular characters were not significantly different, while the average naming time of low-frequency unregular PS(regular SP) characters was shorter than regular PS(regular SP) characters.These results indicated that:a) in lexical decision task, PS characters were processed in a mode favors the RH (right hemisphere) and the SP characters were processed in a mode favors the LH (left hemisphere). b) in naming task, the regular effect was adjusted by frequency and position of phonetic radicals, low-frequency PS characters showed regular effect and low-frequency SP characters showed reversed regular effect. c) the LH whth was capable of processing orthographic information and good at processing phonological information was better in lexical processing compared with the RH. d) frequency was an important property of character-level unit, the frequency effect was shown in every condition and the effects of regularity of high-and low-frequency characters were different.