Tachistoscopic recognition of vertical and horizontal letter symmetry in response to the contralateral organization of the human nervous system

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dc.contributor.advisor Dean, Raymond S. en_US
dc.contributor.author Zukauskis, Ronald L. en_US
dc.date.accessioned 2011-06-03T19:32:49Z
dc.date.available 2011-06-03T19:32:49Z
dc.date.created 2001 en_US
dc.date.issued 2001
dc.identifier LD2489.Z68 2001 .Z85 en_US
dc.identifier.uri http://cardinalscholar.bsu.edu/handle/handle/182265
dc.description.abstract Eight-letter upper case arrays containing vertically symmetrical (VS), e.g., A-T-U-W, horizontally symmetrical (HS), e.g., B-D-C-E, doubly symmetrical (DS), e.g., H-I-O-X, and non-symmetrical (NS), e.g., F-G-L-R, were tachistoscopically exposed bilaterally for 50 ms. to fifteen male and fifteen female undergraduates. The number of letters correctly recognized for each classification condition was used as the criterion measure. A fixed, two-factor design with the second factor being repeated was analyzed using a repeated measures analysis of variance. Consequent to testing Null Hypothesis 1 (that there is no difference between the classification conditions), a check was made for the presence of a significant interaction between gender and classification condition (Null Hypothesis 2). Because Null Hypothesis 1 was rejected and there was no interaction present, the classification group means were tested using a post hoc multiple comparison procedure identified as Tukey's Honestly Significant Difference (HSD) test. Test statistics for the Tukey HSD contrasts found that significantly more VS letters were reported than DS, HS, and NS letters. Significantly more DS letters were reported than HS and NS letters. No difference in report accuracy was found between HS and NS letters. This is in sharp contrast to studies that count only responses reported in the same left-to-right order as the tachistoscopic presentation, i.e., order of report. Previous studies using an order of report method found vertically asymmetrical letters to be reported more accurately than vertically symmetrical ones. The present study disregarded order of from an order of report. It was emphasized that the subject maintain focus on the fixation dot and not attempt to scan the letter-array pattern in a left-to-right direction, as the lettersdid not have to be reported in their respective positions. A different explanation for the Harcum (1964) directionality and Bryden (1968) masking interpretations follows from an order of report method activating additional processing mechanisms such as working memory that are ordinarily not needed to process letter features.Results obtained by the present study are discussed in terms of a reversal of spatial information for touch, kinesthesis, and sound to match the brain’s reversed retino-cortical projection. en_US
dc.description.sponsorship Department of Educational Psychology
dc.format.extent iv, 79 leaves : charts ; 28 cm. en_US
dc.source Virtual Press en_US
dc.subject.lcsh Visual perception -- Testing. en_US
dc.subject.lcsh Brain -- Localization of functions -- Testing. en_US
dc.subject.lcsh Cerebral dominance -- Testing. en_US
dc.subject.lcsh Brain -- Sex differences -- Testing. en_US
dc.subject.lcsh Form perception -- Testing. en_US
dc.title Tachistoscopic recognition of vertical and horizontal letter symmetry in response to the contralateral organization of the human nervous system en_US
dc.description.degree Thesis (Ph. D.) en_US
dc.identifier.cardcat-url http://liblink.bsu.edu/catkey/1221268 en_US


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  • Doctoral Dissertations [3248]
    Doctoral dissertations submitted to the Graduate School by Ball State University doctoral candidates in partial fulfillment of degree requirements.

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