Chapitre 3 Flashcards
Elicited behavior
To elicit means to ‘‘draw out of bring forth’’. Thus, an elicited behavior (or respondent behavior) is a behavior that is drawn out by a preceding stimulus.
Reflexes
Most basic form of elicited bahavior. It’s relatively simple, automatic response to a stimulus. It can also be defined as the relationship between such a response and the stimulus that elicits it.
Startle response
Defensive reaction to a sudden, unexepected stimulus, involves the automatic tightening of skeletal muscles as well as various hormonal and visceral changes.
Orienting response
We automatically position ourselves to facilitate attending to a stimulus, can involve a relatively major body movement, such as when we automatically turn in response to an unfamiliar noise behind us.
Flexion response
Automatically jerk our hand or foot away from a hot or sharp object that we have inadvertently contacted, and the aforementioned startled reaction, designed to ready us to fight or flight if an unexpected stimulus should prove dangerous.
Reflex arc
Neural structure underlying some reflexes that consists of a sensory neuron, an interneuron, and a motor neuron.
Fixed action patterns
Fixed sequences of responses elicited by a specific stimulus. Can be unique to some species and sometime called species-specific behaviors. Fixed action patterns are adaptive responses that have evolved to help animals cope with consistent aspects of their environment.
Sign stimulus
The specific stimulus that elicits a fixed action pattern
Habituation
Decrease in the strength of an elicited behavior following repeated presentation of the eliciting stimulusIt tends to be more stimulus specific, such that even small changes in the stimulus may result in the reappearance of the response.
Sensitization
Increase in the strength of an elicited behavior following repeated presentations of the eliciting stimulus. It’s often generalized to other stimuli.
The effects of habituation and sensitization usually disappear when the stimulus is not presented for a period, meaning that the strength of the behavior returns to its original level.
Short-term habituation
The response quickly decreases because of repeated stimulation and the ability to respond then quickly recovers in the absence of stimulation. . A short-term habituation tends to occur when presentations of the stimulus are narrowly spaced and continuous. Repeated sessions of short-term habituations, spread out over time, can eventually lead to long-term habituation.
Long-term habituation
The response slowly decreases as a result of repeated stimulation, and the ability to respond slowly recovers in the absence of stimulation. A long-term habituation tends to occur when presentations of the stimulus are widely spaced.
Dishabituation
Habituated responses can also reappear following the presentation of a seemingly irrelevant novel stimulus.
Intensity
Low- intensity stimulus, typically result in a habituation. High-intensity stimulus typically result in sensitizations. Stimulus of intermediate intensity often result in an initial period of sensitization, followed by habituation.
Evolutionary (adaptive) significance of the stimulus
Habituation and sensitization are processes that we see across species even in simple organisms. From an evolutionary perspective, this suggests that these processes have tremendous survival advantages. They enable us to categorize stimuli into those that are currently irrelevant, which we tend to habituate to, and those that are currently relevant, which we tend not to habituate to and may even become sensitized.