Accession Number : ADA282005

Title :   Caffeine's Influence on Critical Frequency Thresholds.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Simeroth, John P.

Report Date : 11 MAY 1994

Pagination or Media Count : 120

Abstract : Caffeine'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).

Descriptors :   *THRESHOLD EFFECTS, *CAFFEINE, *VISUAL ACUITY, VISUAL SIGNALS, FREQUENCY, CENTRAL NERVOUS SYSTEM, DOSAGE, RETINA.

Subject Categories : Anatomy and Physiology
      Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE