3 results
Search Results
2. THE EFFECTS OF AWARENESS ON CORTICAL EVOKED POTENTIALS TO CONDITIONED AFFECTIVE STIMULI.
- Author
-
Begleiter, Henri, Gross, Milton M., Portjesz, Bernice, and Kissin, Benjamin
- Subjects
VISUAL evoked response ,EVOKED potentials (Electrophysiology) ,CONDITIONED response ,PSYCHOPHYSIOLOGY - Abstract
A previous paper of ours (Begleiter, Gross, & Kissin, 1967) demonstrated that it was possible to condition affective meaning to meaningless figures (CS), and significantly alter visual evoked potential (VEP) amplitudes and latencies to them, without the S's awareness of the CS-UCS relationship (Experiment I, totally unaware). In the present study some Ss were deliberately informed that a CS-UCS connection existed; however, the exact nature of their relationship was not divulged (Experiment II, slightly aware). Other Ss were explicitly informed of the correct CS-UCS contingency, and entire conditioning paradigm (Experiment III, fully aware). One physiological (VEP) and two behavioral (interfiash interval and semantic differential) indices of conditioning were obtained during an extinction procedure, and demonstrated significant differences between CRs in Experiment II, but none in Experiment III. VEP amplitudes to positive and negative CSs were enhanced in Experiment II, and suppressed in Experiment I, in comparison to the neutral CS. This effect was most marked in responses to the negative CS. It is suggested that level of awareness of the CS-UCS contingency might be reflected in our physiological index of conditioning - VEP amplitude. [ABSTRACT FROM AUTHOR]
- Published
- 1969
- Full Text
- View/download PDF
3. EVOKED CORTICAL RESPONSES TO AFFECTIVE VISUAL STIMULI.
- Author
-
Begleiter, Henri, Gaoss, Milton M., and Kissin, Benjamin
- Subjects
VISUAL evoked response ,EVOKED potentials (Electrophysiology) ,NEUROLOGY ,EMOTIVE (Linguistics) ,SEMANTICS ,VISION - Abstract
The influence of affective meaning on visual evoked responses was investigated in male college students. By utilization of conditioning procedures, previously meaningless figures (CS) acquired affective loadings, e.g., positive, negative, and neutral. The semantic differential scale and critical flicker interval (CFI) were used as indices of conditioning. Although conditioning occurred without awareness, both measures of conditioning yielded results in the same direction, and all three affective conditions differed significantly from one another. Averaged evoked responses were obtained for each affective stimulus. Amplitudes were found to differ significantly from one another in all three conditions, the unpleasant stimulus eliciting the lowest evoked response, and the neutral condition evoking the highest amplitude. Significantly shorter latencies were obtained for the unpleasant stimulus, whereas the latencies of the positive and neutral stimuli did not differ significantly from each other. The results suggest a direct influence of the emotional centers (limbic system) on the visual perception of affective stimuli. Further studies were suggested to clarify the role of awareness and the specific modalities involved in conditioning. [ABSTRACT FROM AUTHOR]
- Published
- 1967
- Full Text
- View/download PDF
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.