Signal detection theory states that our mental state,how we are feeling physically and our environment affects how we perceive a stimulus.
As Alleydog states, if we are feeling threatened because of our surroundings,or how events are taking place, we may perceive a stimulus as threatening. People claim this is a cause of a disorder, that it is our fault for being "on edge"however, it is how we perceive events happening around us. Not only are we perceiving events, but also sounds, smells, sights and all of our senses. The signal detection theory states that we Whenever we are presented with a stimulus, we must use our critical thinking and decision making skills to decide if something is a threat, or not. Outside influences may impact our conclusions.
Past experiences.
We are constantly told that we should not ever be scared or that our past experiences affect our psyche, however, we use decision making based on our past experiences all of the time. As Khan Academy stated, when a light is green, we have to decide whether to stop,or go. It is because of our past experiences that we understand that we have to drive, green means go and red means stop. These past experiences and understanding of how things work keeps us alive. If we drove when the light was red, we could get into a car crash and possibly die.
Signal detection theory states that we have to decide on what stimulus to pay attention to, and which to ignore based on past experiences. This could explain why we choose to ignore certain things and extra attention to other things. For example,it may explain why we pay attention to the extra 30 seconds it took someone to text us back, but not all the other times they were late when not dating. Enviornment, psyche and stimulus all have an affect on how we see things around us.
As stated by Professor David Heeger, biases about things happening will cause us to determine what we think we know about a stimulus that is present. Biases will be relevant in determining what to do when we see, hear or smell a stimulus and if we observe a change in stimulus, or not.
The fight-or-flight response is an example of the signal detection theory in acgtion. When we come upon a stimulus, we must decide if we need to attack, or run, or to approach because it is safe to do so.
If we see a change in stimulus we must make the decision if that change is actually present or not. Sometimes, this can differ from each person. To one person, a sound may be present, taste or smell of a certain food is present and a threat may be present.
We also use signal detection theory when we choose to eat food. What type of food is around, what type of flavor do we desire;savory, sweet, sour? Our choices are usually influenced by the outside sources it shouldn't be influenced by, but our choices we make are usually the foods we desire to eat.
external noise, according to Prof. David Heeger, is the external forces that may act upon a decision.
Internal noise is internal forces that act upon a decision.
As a living being, when we hear a noise we must first decide if we actually heard something or if it is just our minds playing a trick on us, and then we have to decide what to make of what we have heard, seen, smelled or touched.
Past experiences.
We are constantly told that we should not ever be scared or that our past experiences affect our psyche, however, we use decision making based on our past experiences all of the time. As Khan Academy stated, when a light is green, we have to decide whether to stop,or go. It is because of our past experiences that we understand that we have to drive, green means go and red means stop. These past experiences and understanding of how things work keeps us alive. If we drove when the light was red, we could get into a car crash and possibly die.
Signal detection theory states that we have to decide on what stimulus to pay attention to, and which to ignore based on past experiences. This could explain why we choose to ignore certain things and extra attention to other things. For example,it may explain why we pay attention to the extra 30 seconds it took someone to text us back, but not all the other times they were late when not dating. Enviornment, psyche and stimulus all have an affect on how we see things around us.
As stated by Professor David Heeger, biases about things happening will cause us to determine what we think we know about a stimulus that is present. Biases will be relevant in determining what to do when we see, hear or smell a stimulus and if we observe a change in stimulus, or not.
The fight-or-flight response is an example of the signal detection theory in acgtion. When we come upon a stimulus, we must decide if we need to attack, or run, or to approach because it is safe to do so.
If we see a change in stimulus we must make the decision if that change is actually present or not. Sometimes, this can differ from each person. To one person, a sound may be present, taste or smell of a certain food is present and a threat may be present.
We also use signal detection theory when we choose to eat food. What type of food is around, what type of flavor do we desire;savory, sweet, sour? Our choices are usually influenced by the outside sources it shouldn't be influenced by, but our choices we make are usually the foods we desire to eat.
external noise, according to Prof. David Heeger, is the external forces that may act upon a decision.
Internal noise is internal forces that act upon a decision.
As a living being, when we hear a noise we must first decide if we actually heard something or if it is just our minds playing a trick on us, and then we have to decide what to make of what we have heard, seen, smelled or touched.
References
Signal Detection Theory. (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Signal Detection Theory
Exploring Psychology. (n.d). Signal Detection Theory. Retrieves from http://www.mhhe.com/cls/psy/ch04/sdtheory.mhtml
Khan Academy (n.d) Signal detection theory - part 1 (video) | Khan Academy. Retrieved August 05, 2017 from https://www.khanacademy.org/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27T18:45:20.451Z/v/signal-detection-theory-part-1
Heeger, D., Prof. (n.d.). Signal Detection Theory. Retrieved August 05, 2017, from http://www.cns.nyu.edu/~david/handouts/sdt/sdt.html
Psychlopedia. (n.d.). Signal Detection Theory. Retrieved August 05, 2017, from https://psychlopedia.wikispaces.com/Signal Detection Theory
Psych.hanover. (n.d.). Signal Detection Theory. Retrieved August 05, 2017, from http://psych.hanover.edu/JavaTest/SDT/
Wikipedia. (n.d) Dectection Theory. Retrieved August 05, 2017 from https://en.wikipedia.org/wiki/Detection_theor
Signal Detection Theory. (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Signal Detection Theory
Exploring Psychology. (n.d). Signal Detection Theory. Retrieves from http://www.mhhe.com/cls/psy/ch04/sdtheory.mhtml
Khan Academy (n.d) Signal detection theory - part 1 (video) | Khan Academy. Retrieved August 05, 2017 from https://www.khanacademy.org/science/health-and-medicine/nervous-system-and-sensory-infor/sensory-perception-2014-03-27T18:45:20.451Z/v/signal-detection-theory-part-1
Heeger, D., Prof. (n.d.). Signal Detection Theory. Retrieved August 05, 2017, from http://www.cns.nyu.edu/~david/handouts/sdt/sdt.html
Psychlopedia. (n.d.). Signal Detection Theory. Retrieved August 05, 2017, from https://psychlopedia.wikispaces.com/Signal Detection Theory
Psych.hanover. (n.d.). Signal Detection Theory. Retrieved August 05, 2017, from http://psych.hanover.edu/JavaTest/SDT/
Wikipedia. (n.d) Dectection Theory. Retrieved August 05, 2017 from https://en.wikipedia.org/wiki/Detection_theor