Signal Detection Theory: A theory in psychology which characterizes not only the acuity of an individual’s discrimination but also the psychological factors that bias the individual’s judgments. Failure to separate these two aspects of discrimination had tempered the success of theories based upon the classical concept of a sensory threshold. The theory provides a modern and more complete account of the process whereby an individual makes fine discrimination. The capacity to discriminate stimuli is based on physical energy, and external factors such as costs and benefits.
Signal Detection Theory is a statistical technique designed to locate a signal against a background of noise. This theory states that there are no absolute thresholds for sensations. In addition it describes one of the more important cognitive tasks the brain performs. Every sensory organ in an animal is exposed to a variety of stimuli. Most of this will be noise or meaningless information, but some of it will be highly valuable and informative. The background stimuli are noise, while the information is a signal. The nervous system and primarily the brain use various algorithms to attempt to detect these signals.
In basic signal detection theory there are two possible states for a signal: present or absent. Individuals attempting to detect the signal will either say it is present or absent. Combined that leads to four possible combinations, labelled as follows:
What is response bias?
Response bias is a type of cognitive bias which can affect the results of a statistical survey if respondents answer questions in ...MoreAnswered
What is Steven's Law?
Steven's Law provides a direct method to measure stimulus intensity and sensation. In his method, a series of stimuli are presente...MoreAnswered
- What is Fechner's Law in psychology? Answered
What is Weber's law in psychology?
Weber's law is: Weber's Law states that the size of the difference threshold is proportional to the intensity of ...MoreAnswered
What is the different between threshold and absolute threshold in Psychology?
A difference threshold (or just-noticeable difference) is the magnitude of the smallest difference between two stimuli of differin...MoreAnswered
What is absolute threshold in Psychology?
An absolute threshold is the level of intensity of a stimulus at which the subject is able to detect the presence of the stimulus ...MoreAnswered
What is Psychophysics?
Psychophysics quantitatively investigates the relationship between physical stimuli and the sensations and perceptions they affect...MoreAnswered
Distinguish between Classical Theory and Neoclassical Theory.
Classical theory known as Ricardian theory of comparative advantage states that two countries should trade in order to increase their national welfare as long a...MoreAnswered
Explain the Modern Theory of Trade.
The modem theory of trade rejects classical and Neo-classical model of perfect competition and constant returns to scale. Modern theory takes a...MoreAnswered
Explain the Rybczynski Theory of Trade.
Rybczynski theory of trade states that if the supply of a factor rises and the terms of trade remain constant, the output of the product intens...MoreAnswered
Legal conditions are a very critical component in selecting foreign markets. Do you agree.
Yes, it is true, that analysis of legal conditions are a very critical component in selecting foreign markets. In different countries, laws are different and la...MoreAnswered
How the Social and Cultural conditions influence foreign market selection?
An international marketer should be familiar with the Social and Cultural Conditions of the host country. Following are the main elements of social and ...MoreAnswered
How the Political conditions influence the Foreign Market Selection?
Political conditions prevailing the host country is one of the most important factor affecting the foreign market selection. Political conditio...MoreAnswered
What is the difference between Macro Indicators and Micro Indicators?
Macro Indicators and Micro Indicators are the two types of indicators which can help the marketer in estimating the size of the overseas market: M...MoreAnswered
Explain the Steps Involved in the Process of International Market Selection.
The various steps involved in the process of international market selection are: Defining the market. Market ...MoreAnswered