P300 Test

P300 Test

The P300 test is a medical test performed on crime suspects to help determine whether they are guilty. The test uses the concept that when the brain recognizes external stimuli, e.g. an image or sound, it generates a brain wave. This wave is known as a "P300 wave." The theory is that if a subject recognizes an image or sound, perhaps associated with the crime they allegedly committed, investigators can determine whether they are guilty or not.

The subject is typically shown certain images or made to hear certain sounds. Sensors attached to the subject's head monitor electrical activity in the brain and pick up P300 waves, which indicate that the subject has recognized the stimulus in some way.

The test is used by investigators to check the subject's reactions against earlier tests or findings, such as polygraph tests, or to determine if the subject is familiar with certain objects, such as a murder weapon in a murder case.

External links

* [http://www.brainwavescience.com/TechnologyOverview.php How the P300 test works]


Wikimedia Foundation. 2010.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • P300 — La onda P300 (EP300, P3) es un potencial evocado que puede ser registrado mediante electroencefalografía como una deflexión positiva de voltaje con una latencia de unos 300ms en el EEG. La presencia, magnitud, topografía y duración de esta señal… …   Wikipedia Español

  • P300 (neuroscience) — The P300 (P3) wave is an event related potential (ERP) elicited by infrequent, task relevant stimuli. It is considered to be an endogenous potential as its occurrence links not to the physical attributes of a stimulus but to a person s reaction… …   Wikipedia

  • Brain fingerprinting — is a controversial forensic science technique that uses electroencephalography (EEG) to determine whether specific information is stored in a subject’s brain. It does this by measuring electrical brainwave responses to words, phrases, or pictures …   Wikipedia

  • Difference due to Memory — (Dm) indexes differences in neural activity during the study phase of an experiment for items that subsequently are remembered compared to items that are later forgotten. It is mainly discussed as an event related potential (ERP) effect that… …   Wikipedia

  • Brain–computer interface — Neuropsychology Topics Brain computer interface …   Wikipedia

  • Trastorno límite de la personalidad — «Borderline» redirige aquí. Para otras acepciones, véase Borderline (desambiguación). Trastorno límite de la personalidad Clasificación y recursos externos …   Wikipedia Español

  • Curcumin — IUPAC name (1E,6E) 1,7 bis (4 hydroxy 3 methoxyphenyl) 1,6 heptadiene 3,5 dione …   Wikipedia

  • Event-related potential — An event related potential (ERP) is any stereotyped electrophysiological response to an internal or external stimulus. More simply, it is any measured brain response that is directly the result of a thought or perception. MeasurementERPs can be… …   Wikipedia

  • Mental chronometry — For Ian Lowe s book, see Reaction Time (book). Reaction time redirects here. For the biological mechanism, see Reflex. Mental chronometry is the use of response time in perceptual motor tasks to infer the content, duration, and temporal… …   Wikipedia

  • Brain-computer interface — A brain computer interface (BCI), sometimes called a direct neural interface or a brain machine interface, is a direct communication pathway between a human or animal brain (or brain cell culture) and an external device. In one way BCIs,… …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”