Use of magnitude-estimation scaling for predicting hemispheric processing of lexical decisions.
The purpose of this study was to evaluate the usefulness and validity of magnitude-estimation scaling as an alternative to a traditional, somewhat more cumbersome reaction-time procedure in the assessment of hemispheric processing asymmetry. Lexical decision vocal reaction times and magnitude-estimation scaling values were obtained for 16 normal subjects to tachistoscopically presented concrete and abstract words. Analysis of variance showed identical interactions of field x stimuli for each dependent variable while all pair-wise correlations between these measures were significant. Magnitude-estimation scaling may be a sensitive measure of visual psychophysical differences in hemispheric processing and may circumvent problems with variance of latencies associated with disordered populations.
Ellis
L W
LW
Department of Special Education Services, University of Toledo, OH 43606.
Kaderavek
J N
JN
Rastatter
M P
MP
D000328:Adult; D001288:Attention; D003657:Decision Making; D004193:Discrimination Learning; D004292:Dominance, Cerebral; D005260:Female; D006801:Humans; D010364:Pattern Recognition, Visual; D011930:Reaction Time; D011932:Reading; D012016:Reference Values