1 John Uebersax PhD, Morro Bay, California, jsuebersax@yahoo.com AN INVENTORY OF COGNITIVE ENHANCEMENT EFFECTS OF CANNABIS John Uebersax 1 1st Draft: 21 May 2021 ABSTRACT Social policy debate on cannabis has focused on its medicinal value and "recreational" use. Little attention has been given other reported commonly reported positive effects of cannabis, such as improved cognition or as a means of eliciting transcendent states of consciousness. This paper attempts to lay groundwork for future studies of positive cognitive effects of cannabis by constructing a comprehensive list of specific reported positive effects on thought processes, creativity and self-insight. Relevant items from survey studies conducted from 1970 to 2019 on experiences, expectancies and motivations of cannabis users are presented and summarized. Additional items are also proposed based on published user reports and other anecdotal evidence. 134 positive effects of cannabis on cognition and creativity are identified from previous studies and 73 new possible effects are suggested. Further research is needed to verify and better characterize these effects, understand their biological mechanisms, and determine correlates, such as dosage, cannabis strains, means of ingestion, etc. It is important in any case to recognize that use of cannabis for its potential positive effects on cognition, creativity and insight constitutes a category distinct from medicinal or recreational use. Common reports of improved mental clarity as a cannabis effect suggests cannabinoids might be used to produce new medications to treat symptoms of anxiety disorders, PTSD, and ADHD. Greater awareness of the cognitive enhancement potential of cannabis may help to change user expectations and motivations and promote responsible use. KEY TERMS: Cannabis; cognition; positive effects; mental lucidity; creativity; insight, psychometrics; survey research.