Download PDF by R. Lynn: Attention, Arousal and the Orientation Reaction

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By R. Lynn

ISBN-10: 0080115241

ISBN-13: 9780080115245

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3. This model cannot explain the secondary orientation reaction after initial habituation, or recovery of the orientation reaction with drowsiness. 4. Finally, it suffers from the various difficulties discussed in connection with Pavlov's theory, which make any one-stage theory of habituation untenable. GASTAUT Gastaut (1957) has directed his attention mainly to the different rates of habituation of the generalized and the localized orientation reaction. The model he proposes is shown in Fig. 10, and the suggested stages in habituation are as follows.

Some of these effects are shown in Fig. 9. This again shows that habituation is not simply a fatigue-like process. (160) (120) (160) *HW^*JL**4*/*^^ WM^^VV^^^ FIG. 9. Reappearance of orienting reflex on diminishing intensity of the light stimulation. In (A) to (F), from top to bottom: signal of light in relative units, occipital EEG, and PGR. (A) After three sessions, complete habituation. (B) Diminishing light intensity from 160 to 120 relative units evokes a generalized reaction (alpha depression and PGR).

3. Certain neurotics (Sokolov, 1963a, p. 122). 4. Dog subjects with "weak" nervous systems (Vinogradov, 1933). 5. Human subjects with "strong excitatory potentals" (this variable is discussed in Chapter 7). 3. Drug Effects There has been rather little research on the effects of drugs on the orientation reaction. Some work has been done with chlororomazine. Rothballer (1955) reported that it abolishes or reduces the 32 ATTENTION, AROUSAL AND ORIENTATION REACTION generalized orientation reaction but has no effect on the localized orientation reaction.

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Attention, Arousal and the Orientation Reaction by R. Lynn

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