Welcome To UTPedia

We would like to introduce you, the new knowledge repository product called UTPedia. The UTP Electronic and Digital Intellectual Asset. It stores digitized version of thesis, dissertation, final year project reports and past year examination questions.

Browse content of UTPedia using Year, Subject, Department and Author and Search for required document using Searching facilities included in UTPedia. UTPedia with full text are accessible for all registered users, whereas only the physical information and metadata can be retrieved by public users. UTPedia collaborating and connecting peoples with university’s intellectual works from anywhere.

Disclaimer - Universiti Teknologi PETRONAS shall not be liable for any loss or damage caused by the usage of any information obtained from this web site.Best viewed using Mozilla Firefox 3 or IE 7 with resolution 1024 x 768.



[img] PDF
Download (5Mb)


The Event-Related Potential (ERP) components, PlOO and P300 are thought to reflect visual and cognitive information processing, respectively. Recent studies suggested that these ERPs are influenced by natural or environmentally induced variables. The present study investigated the efficiency of visual and cognitive information processing over time and also the effect of caffeine intake on both visual and cognitive functions. The sample consisting of ten healthy individuals (five female and five male), was submitted to a visual discrimination task (oddball paradigm) at three different times (i.e., morning, afternoon and evening) within the same day. Also, subjects were required to undergo the same visual test after the administration of caffeine (65 mg). The main components of interest; PIOO and P300 are studied and analyzed based on two variables used to quantity the components: latency and amplitude. Results suggest that visual and cognitive efficiency degrade over time (as observed by an increase in latency and a decrease in amplitude in most subjects). After the caffeine administration, the visual and cognitive efficiency for most subjects seemed to improve (a decrease in latency while an increase in amplitude). However, the caffeine effect was more prominent in a fatigue condition compared to well-rest condition. Though partially confirmed the hypotheses, this study provides evidences for the time-of-day and caffeine effects on both visual and cognitive processing efficiency as proposed in the current literature.

Item Type: Final Year Project
Academic Subject : Academic Department - Electrical And Electronics - Communications - Digital Communications - Digital Signal Processing
Subject: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Engineering > Electrical and Electronic
Depositing User: Users 2053 not found.
Date Deposited: 12 Nov 2013 08:56
Last Modified: 25 Jan 2017 09:42
URI: http://utpedia.utp.edu.my/id/eprint/10457

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...