Covariation between two-flash threshold and skin conductance level in first-breakdown schizophrenics
Gordon Claridge, Kenneth Clark
Routledge eBooks May 15, 2018 DOI: 10.4324/9781315268217-8 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Peer reviewed |
|---|---|
| Intervention | LSD-25 |
| Measures | two-flash threshold, skin potential, skin conductance |
| Key points | Reports that during the treatment phase, an upward trend in skin conductance was sharply reversed, particularly in the short delay group. Describes a procedure pairing two-flash threshold estimates with polygraph skin resistance readings, and states that range-correction of skin conductance readings was not undertaken because the transformation seemed inappropriate. |
Abstract
This chapter examines the effect of LSD-25 on the covariation between two-flash threshold and skin potential. A Ferranti type CL-64 cathode tube, reduced in intensity with a Kodak neutral density filter and situated at eye-level 2.2 m from the subject, was used to determine the two-flash threshold. During each estimation of the two-flash threshold, a resistance reading coinciding with both the upper and lower thresholds was read from the polygraph chart. After attachment of the electrodes, the two-flash threshold task was explained and a trial run attempted. In a comparable analysis of the treatment phase of the experiment, pooling of the data was again considered advisable; range-correction of the skin conductance readings was not undertaken, however, since the transformation seemed inappropriate. During treatment, this upward trend in skin conductance was sharply reversed, especially in the short delay group.