The American Psychiatric Association (APA) has updated its Privacy Policy and Terms of Use, including with new information specifically addressed to individuals in the European Economic Area. As described in the Privacy Policy and Terms of Use, this website utilizes cookies, including for the purpose of offering an optimal online experience and services tailored to your preferences.

Please read the entire Privacy Policy and Terms of Use. By closing this message, browsing this website, continuing the navigation, or otherwise continuing to use the APA's websites, you confirm that you understand and accept the terms of the Privacy Policy and Terms of Use, including the utilization of cookies.

×
Published Online:https://doi.org/10.1176/ajp.118.9.815

1. Different initial affective responses occurred in identical twins under the influence of d-LSD-25 and psilocybin.

2. These affective displays were related to the differences in personality between the twins.

3. It was possible for the affectivity of each twin to influence the affective response of the other at various times during the studies.

4. This communication of affect substantiates the hypothesis that affective responses associated with hallucinogen administration are personality specific rather than drug specific(1, 2, 3, 4, 5).

5. The drug specific changes in the autonomic, proprioceptive and perceptual spheres were similar in both twins and not modified to any noticeable extent by environmental influences.

6. Because of their profound effects, hallucinogens should be restricted to research use exclusively in a hospital setting. In our opinion, their use at this time for any other purpose or in any other setting is dangerous.

Access content

To read the fulltext, please use one of the options below to sign in or purchase access.