Caffeine's influence on critical flicker frequency thresholds

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dc.contributor.authorSimeroth, John P.en
dc.contributor.departmentPsychologyen
dc.date.accessioned2014-03-14T21:32:53Zen
dc.date.adate2009-04-07en
dc.date.available2014-03-14T21:32:53Zen
dc.date.issued1994en
dc.date.rdate2009-04-07en
dc.date.sdate2009-04-07en
dc.description.abstractCaffeine's effect on the visual system was investigated. Twelve male and twelve female subjects (aged 18 - 25 years) were measured for Critical Flicker Frequency (CFF) thresholds at 15 levels of retinal illuminance (-1.0 to 3.0 log trolands) in each of four caffeine dosage conditions (0, 200mg, 400mg, 600mg). Variables of interest included dosage, gender, left and right eye differences, and time after ingestion. Significant results were found for dosage (p=.000), gender (p=.001), and eye differences (p=.000). Interactions were found for gender and dosage (p=.000), and gender and eye differences (p=.043). Implications of these findings are discussed in terms of caffeine's effect on the Central Nervous System (CNS) and corresponding effects on the visual system. It is concluded that ingestion of caffeine causes increased sensitivity of the visual system as displayed through lower Critical Flicker Frequency thresholds.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 108 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-04072009-040629en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04072009-040629/en
dc.identifier.urihttp://hdl.handle.net/10919/41927en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1994.S574.pdfen
dc.relation.isformatofOCLC# 31698632en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1994.S574en
dc.subject.lcshCaffeine -- Physiological effecten
dc.subject.lcshFlicker fusion -- Testingen
dc.titleCaffeine's influence on critical flicker frequency thresholdsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplinePsychologyen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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