What is the threshold of excitation? what is the threshold of excitation of a neuron.
For odors, the absolute threshold involves the smallest concentration that a participant is able to smell. An example of this would be to measure the smallest amount of perfume that a subject is able to smell in a large room.
The definition of a threshold is the entrance or start of something. An example of threshold is the doorway of a house. An example of threshold is the transition from high school to college. The point that must be exceeded to begin producing a given effect or result or to elicit a response.
- Absolute threshold: the lowest level at which a stimulus can be detected.
- Recognition threshold: the level at which a stimulus can not only be detected but also recognised.
- Differential threshold the level at which an increase in a detected stimulus can be perceived.
(A threshold is the lowest point at which a particular stimulus will cause a response in an organism.) In human eye: Measurement of the threshold. An important means of measuring a sensation is to determine the threshold stimulus—i.e., the minimum energy required to evoke the sensation.
Midway through this cavalcade of bunk, the authors announce that it was common to spread “thresh” (presumably reeds or rushes) on the floor of one’s house to prevent slipping, necessitating the addition of a piece of wood in the bottom of the doorway, called a “threshold,” to keep the “thresh” from “slipping outside.” …
Weber’s Law, also sometimes known as the Weber-Fechner Law, suggests that the just noticeable difference is a constant proportion of the original stimulus. For example, imagine that you presented a sound to a participant and then slowly increased the decibel levels.
n. in signal detection tasks, an incorrect indication by the participant that a signal is absent in a trial when it is actually present. See also false rejection; signal detection theory
Think about it this way: sensitivity is a measurement of the amount of change in a camera’s field of view that qualifies as potential motion detection, and threshold is how much of that motion needs to occur in order to actually trigger the alarm.
Weber’s law, also called Weber-Fechner law, historically important psychological law quantifying the perception of change in a given stimulus. The law states that the change in a stimulus that will be just noticeable is a constant ratio of the original stimulus.
The method of constant stimuli means that threshold is determined by presenting the observer with a set of stimuli of which some are above the threshold and of which some are below the threshold but that the set of stimuli are presented in a random order.
any place or point of entering or beginning: the threshold of a new career. Also called limen
The threshold signifies the passage from one level to an other, usually from a lower, earthly plane to a higher, spiritual one. It is the entrance to a new world, the boundary at which the natural meets the supernatural.
Threshold Value means a value or range of values that allows for an assessment of the quality level achieved for a particular criterion, thereby contributing to the assessment of the extent to which good environmental status is being achieved.