Research record / Reviewed 23 August 2026

What supports each claim?

The main lessons use plain language. This ledger makes the source type, population, jurisdiction, strength, and limits visible for readers who want to inspect the foundation.

How to read it

Different evidence answers different questions.

Classic theory explains a social process. Discourse analysis studies how institutions organize meaning. Experiments isolate selected effects.

Qualitative research records reported experience. Population surveys identify patterns. Official guidance translates a broader evidence base for public use.

No single source settles every question. The strength label describes how well a source supports the specific claim shown here, not whether the source is valuable in general.

Claim ledger

20 reviewable claims.

Becker proposed that becoming a cannabis user involves learning an effective technique, recognizing effects, and learning to interpret those effects as enjoyable.

Becoming a Marihuana User

Study type: Classic sociological theory based on qualitative field research
Population: Cannabis users studied in the United States in the mid-twentieth century
Jurisdiction: United States
Evidentiary strength: Foundational conceptual source
Limitations: Historical and pre-legalization. It does not measure pharmacology, describe every user, or establish a universal sequence.
Used in: You Are Not a Type; Learning the Cannabis Experience
Review date: 2026-08-23

Cormack and Cosgrave describe three post-legalization reformulations: learning to trust the licensed market, understanding the high through individualized risk assessment, and adopting official meanings of responsible consumption.

The State and the Legal Canadian Cannabis User: Revisiting Howard Becker

Study type: Sociological discourse and policy analysis
Population: Canadian commissions, task forces, legislation, and government discourse
Jurisdiction: Canada
Evidentiary strength: Strong interpretive source for state meaning-making
Limitations: The article analyzes discourse and administration. It is not empirical proof that every person accepts, rejects, or internalizes these meanings.
Used in: You Are Not a Type; Learning the Cannabis Experience; Character: Laziness, Motivation, and Credibility; Define Yourself More Carefully
Review date: 2026-08-23

In a balanced-placebo experiment, both cannabis administration and what participants believed they received were relevant to selected measures of impulsivity and risk-taking.

Balanced placebo design with marijuana: Pharmacological and expectancy effects on impulsivity and risk taking

Study type: Randomized laboratory balanced-placebo experiment
Population: Experienced weekly cannabis users enrolled in a controlled study
Jurisdiction: United States
Evidentiary strength: Moderate experimental evidence for selected short-term outcomes
Limitations: The defined sample, laboratory setting, dose, and selected outcomes limit generalization. Expectancy does not erase impairment, dose effects, adverse reactions, dependence, or health risk.
Used in: Learning the Cannabis Experience; The Mind: Intelligence, Memory, and Creativity
Review date: 2026-08-23

A small Canadian qualitative study found that some therapeutic cannabis users described concealment, educating others, and presenting themselves as responsible while managing stigma.

Perceptions of cannabis as a stigmatized medicine: a qualitative descriptive study

Study type: Qualitative descriptive interview study
Population: Twenty-three people using cannabis for therapeutic purposes in British Columbia
Jurisdiction: British Columbia, Canada
Evidentiary strength: Limited qualitative evidence of reported experience
Limitations: Data were collected before adult-use legalization from a small, self-selected medical-use sample in one province. The findings do not estimate prevalence.
Used in: Responsibility, Care, and Relationships; Define Yourself More Carefully
Review date: 2026-08-23

Canadian veterans living with pain described stigma as one part of their experiences with medicinal cannabis, alongside perceived benefits, barriers, and unanswered concerns.

Views on and experiences with medicinal cannabis among Canadian veterans who live with pain: A qualitative study

Study type: Qualitative focus-group study
Population: Twelve Canadian veterans living with pain
Jurisdiction: Canada
Evidentiary strength: Limited qualitative evidence of reported experience
Limitations: The sample was small and specific. Self-reported experience cannot establish treatment effectiveness or represent all veterans or cannabis users.
Used in: Responsibility, Care, and Relationships; Harm Without Shame
Review date: 2026-08-23

In national focus groups, Canadian adults aged 60 and older described changing social acceptance after legalization while cannabis-related stigma still persisted for some participants.

Perceptions of cannabis among adults aged 60 years and older in Canada: a qualitative study

Study type: Qualitative study using ten online focus groups
Population: Seventy-two adults aged 60 and older across five Canadian regions
Jurisdiction: Canada
Evidentiary strength: Moderate qualitative evidence across a national older-adult sample
Limitations: Focus groups show patterns in reported experience but do not estimate national prevalence or represent younger people.
Used in: You Are Not a Type; Responsibility, Care, and Relationships; Define Yourself More Carefully
Review date: 2026-08-23

Repeated Canadian cross-sectional surveys found no evidence of a change in the proportion classified as high-risk cannabis users during the first two years after legalization, while differences by social and neighbourhood factors remained important.

Patterns of problematic cannabis use in Canada pre- and post-legalisation

Study type: Repeat cross-sectional survey analysis
Population: Canadians aged 16 to 65 surveyed in 2018, 2019, and 2020
Jurisdiction: Canada
Evidentiary strength: Moderate observational population evidence
Limitations: Cross-sectional surveys cannot track individual change or establish causes. A high-risk screening category is not a diagnosis or a moral identity.
Used in: Harm Without Shame
Review date: 2026-08-23

A 2026 thematic synthesis found recurring reports of perceived stigma and social consequences across qualitative studies of medical cannabis experience, even as legal and regulatory contexts changed.

The Persistence of Stigma and Other Challenges Experienced by Medical Cannabis Users

Study type: Thematic synthesis of forty-five qualitative studies
Population: People reporting medical cannabis use for chronic pain and other conditions across multiple countries
Jurisdiction: International, including Canada
Evidentiary strength: Strong synthesis of qualitative experience evidence
Limitations: The included studies varied by jurisdiction, date, policy context, condition, and method. The synthesis does not estimate prevalence or establish medical effectiveness.
Used in: Responsibility, Care, and Relationships; Harm Without Shame; Define Yourself More Carefully
Review date: 2026-08-23

Cannabis can produce wanted and unwanted effects, and effects can vary with THC and CBD content, dose, route, individual factors, other substances, and context.

Health effects of cannabis

Study type: Current official public-health guidance
Population: General public
Jurisdiction: Canada
Evidentiary strength: Authoritative Canadian guidance, not a single primary study
Limitations: General guidance cannot predict one person's response or replace individualized medical advice.
Used in: Learning the Cannabis Experience; The Body: Appetite, Food, Rest, and Movement; The Mind: Intelligence, Memory, and Creativity; Harm Without Shame
Review date: 2026-08-23

Link and Phelan define stigma as labeling, stereotyping, separation, status loss, and discrimination occurring together through social power.

Conceptualizing Stigma

Study type: Foundational sociological concept analysis
Population: Stigma scholarship across social domains
Jurisdiction: Conceptual; not limited to one jurisdiction
Evidentiary strength: Foundational framework for defining a social process
Limitations: The framework does not decide whether a specific cannabis concern is fair or measure one person's experience without additional evidence.
Used in: You Are Not a Type
Review date: 2026-08-23

Reid organizes cannabis stigma across structural, social, and personal levels and identifies a limited evidence base on internalized stigma.

A qualitative review of cannabis stigmas at the twilight of prohibition

Study type: Qualitative literature review
Population: Cannabis-stigma research across multiple populations
Jurisdiction: Multiple jurisdictions, with substantial North American evidence
Evidentiary strength: Useful synthesis and conceptual organization
Limitations: A qualitative review does not estimate prevalence or validate a scale for all adult cannabis consumers.
Used in: You Are Not a Type
Review date: 2026-08-23

In King's US survey, higher anticipated stigma and higher total stigma scores were associated with never or only sometimes disclosing cannabis use.

The role of stigma in cannabis use disclosure: an exploratory study

Study type: Cross-sectional online convenience-sample survey
Population: 249 US adults who reported cannabis use and recent health care
Jurisdiction: United States
Evidentiary strength: Exploratory association evidence
Limitations: The sample was small and homogeneous. Measures were adapted from other substance-stigma scales and were not newly validated for all adult consumers.
Used in: You Are Not a Type; Responsibility, Care, and Relationships
Review date: 2026-08-23

Older Canadian participants described concealment, selective disclosure, distancing from stereotypes, and reframing around medicinal cannabis.

The Effects of Stigma: Older Persons and Medicinal Cannabis

Study type: Qualitative descriptive interview study
Population: Older adults in Canada with medicinal cannabis experience
Jurisdiction: Canada
Evidentiary strength: Direct qualitative evidence of reported experience
Limitations: The accounts do not show how common each response is, represent all older adults, or establish treatment effectiveness.
Used in: You Are Not a Type; Responsibility, Care, and Relationships
Review date: 2026-08-23

In a controlled vapor study, cannabis increased short-term energy intake in small human groups during the early food-access period.

Cannabis produces acute hyperphagia in humans and rodents

Study type: Controlled human vapor study plus translational rat experiments
Population: Small groups of adult human participants and laboratory rats
Jurisdiction: Canada and United States research settings
Evidentiary strength: Experimental evidence for a narrow acute outcome
Limitations: The study does not establish long-term diet quality, body-weight change, a dietary recommendation, or the response of every person.
Used in: The Body: Appetite, Food, Rest, and Movement
Review date: 2026-08-23

Among university students, an initial association between past-month cannabis use and lower diet quality was attenuated and no longer statistically significant after meal skipping was included.

Cannabis Use and Diet Quality Among University Students

Study type: Cross-sectional online survey with sequential regression models
Population: 1,467 students in the fully adjusted Canadian analysis
Jurisdiction: Canada
Evidentiary strength: Moderate association evidence with measured covariates
Limitations: Cross-sectional data cannot establish direction or causation. The student sample and self-reported measures limit generalization.
Used in: The Body: Appetite, Food, Rest, and Movement
Review date: 2026-08-23

In NHANES data, current cannabis users had lower average diet-quality scores than previous and never users, while all groups had room to improve.

Dietary quality differs among cannabis use groups

Study type: Cross-sectional secondary analysis of national survey data
Population: 17,855 US adults aged 20 to 59
Jurisdiction: United States
Evidentiary strength: Large population association study
Limitations: Group differences cannot establish that cannabis caused diet quality or predict an individual's diet, health, or body weight.
Used in: The Body: Appetite, Food, Rest, and Movement
Review date: 2026-08-23

In two experiments, cannabis use increased joviality and more favorable creativity evaluations without improving evaluated creativity on study tasks.

Cannabis use does not increase actual creativity but biases evaluations

Study type: Two experiments with cannabis-use and abstinence conditions
Population: Adult cannabis users completing defined creativity tasks
Jurisdiction: United States
Evidentiary strength: Experimental evidence for selected tasks and evaluations
Limitations: The study does not measure every creative field, finished work, global intelligence, or every dose and use pattern.
Used in: The Mind: Intelligence, Memory, and Creativity
Review date: 2026-08-23

In a randomized study of regular users, the high-THC group performed worse on one divergent-thinking task than low-dose and placebo groups.

Cannabis and creativity: highly potent cannabis impairs divergent thinking

Study type: Randomized double-blind between-groups laboratory study
Population: 54 regular cannabis users in three groups
Jurisdiction: Netherlands
Evidentiary strength: Experimental evidence for a narrow acute task
Limitations: The small sample and selected task do not settle every form of creativity, intelligence, or real-world output.
Used in: The Mind: Intelligence, Memory, and Creativity
Review date: 2026-08-23

A 2018 review found equivocal cross-sectional evidence for a cannabis-specific motivation effect and partial longitudinal support for a possible causal link with reduced motivation.

Nonacute effects of cannabis use on motivation and reward sensitivity

Study type: Systematic review of 22 human studies
Population: Human cannabis-use samples across included studies
Jurisdiction: Multiple jurisdictions
Evidentiary strength: Systematic synthesis of mixed evidence
Limitations: Included studies defined motivation differently and varied in control of confounding. Partial support is not a universal causal conclusion.
Used in: Character: Laziness, Motivation, and Credibility
Review date: 2026-08-23

CannTeen found no greater apathy or reduced effort-based reward behavior among adolescent or adult cannabis users in its comparison samples.

Anhedonia, Apathy, Pleasure, and Effort-Based Decision-Making

Study type: Cross-sectional comparison with behavioral and self-report measures
Population: 274 adolescent and adult users and age-matched controls
Jurisdiction: United Kingdom
Evidentiary strength: Direct evidence across several motivation-related measures
Limitations: The findings do not prove no effect for every person, dose, frequency, developmental stage, or longitudinal pattern.
Used in: Character: Laziness, Motivation, and Credibility
Review date: 2026-08-23