Habituation of the orienting reaction as a function of stimulus information

According to Sokolov (1966), habituation of the orienting reaction is determined by the information value of the orienting stimulus. To test this hypothesis, three groups of 12 Ss were presented with a series of visual stimuli constructed so as to convey one, two, or three bits of information. For the GSR component, but not for the finger pulse volume component of the orienting reaction, resistance to habituation appeared to be an increasing linear function of information value. The results thus support Sokolov’s contention for the GSR component of the reaction

Overextinction of the orienting reaction

Sokolov's 1963 report of return of the orienting reaction (OR) to repeated stimulus presentations following habituation was examined in 18 S's using the galvanic skin response (GSR) component of the OR and an auditory stimulus of 60 db intensity and 1000 cps. Both group and individual S data analysis indicated a return of the OR which habituated quickly. The number of stimulus presentations to the OR return point showed an inverse relationship to rate of initial OR habituation for individual S's

Detecting fasciculations in cranial nerve innervated muscles with ultrasound in amyotrophic lateral sclerosis

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