Biomaterial Database

Effects of CS-US interval modification on diminution of the unconditioned response in electrodermal classical conditioning. 1999

J L Marcos, and J Redondo

Departamento de Psicología, Universidad de La Coruña, Spain. jlmarc@udc.es

The purpose of this experiment was to study whether interstimulus interval (ISI) modification differentially affects the amplitude of the unconditioned response (UR amp.). Seventy-five volunteer subjects received discrimination training with an interval between conditioned stimulus (CS) and unconditioned stimulus (US; aversive white noise) of 8 s. After the discrimination training phase, subjects exhibiting discriminative control were randomized into three groups that differed according to the ISI, of 1, 5 or 8 s. The subjects of each group were then tested with five presentations of CS + /US. The results demonstrate that the UR showed a greater amplitude when an ISI of 8 s was used than with ISIs of 1 or 5 s. No significant differences were found between the UR amp. of the 1- and 5-s ISI groups. These findings are discussed as a result of a hypothetical experimentally induced blend of the anticipatory CRs with the UR.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D010775	Photic Stimulation	Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity.	Stimulation, Photic,Visual Stimulation,Photic Stimulations,Stimulation, Visual,Stimulations, Photic,Stimulations, Visual,Visual Stimulations
D011897	Random Allocation	A process involving chance used in therapeutic trials or other research endeavor for allocating experimental subjects, human or animal, between treatment and control groups, or among treatment groups. It may also apply to experiments on inanimate objects.	Randomization,Allocation, Random
D001767	Blinking	Brief closing of the eyelids by involuntary normal periodic closing, as a protective measure, or by voluntary action.	Orbicularis Oculi Reflex,Reflex, Blink,Reflex, Corneal,Reflex, Orbicularis Oculi,Winking,Blink Reflexes,Corneal Reflexes,Orbicularis Oculi Reflexes,Blink Reflex,Reflexes, Blink,Reflexes, Orbicularis Oculi
D003214	Conditioning, Classical	Learning that takes place when a conditioned stimulus is paired with an unconditioned stimulus.	Reflex, Conditioned,Classical Conditioning,Classical Conditionings,Conditioned Reflex,Conditionings, Classical
D005260	Female		Females
D005712	Galvanic Skin Response	A change in electrical resistance of the skin, occurring in emotion and in certain other conditions.	Electric Conductance, Skin,Electrodermal Response,Reflex, Psychogalvanic,Skin Electric Conductance,Conductance, Skin Electric,Conductances, Skin Electric,Electric Conductances, Skin,Electrodermal Responses,Galvanic Skin Responses,Psychogalvanic Reflex,Response, Electrodermal,Response, Galvanic Skin,Responses, Electrodermal,Responses, Galvanic Skin,Skin Response, Galvanic,Skin Responses, Galvanic
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D013997	Time Factors	Elements of limited time intervals, contributing to particular results or situations.	Time Series,Factor, Time,Time Factor