Cannabis and Dopamine Study: Article Analysis Questions
Instructions: Write a response to the following questions in complete sentences using psychological terminology.
Group 1
Answer the following questions based on the provided study information and results.
Source 1.1
Introduction Cannabis, often called marijuana, contains a chemical called THC (tetrahydrocannabinol). THC affects the brain by attaching to receptors that influence memory, attention, and dopamine release. Scientists have been studying whether long-term cannabis use changes how well people perform on memory tasks, as well as how their brain’s dopamine system responds. The main question: Does heavier cannabis use relate to weaker memory performance and altered dopamine activity?
Participants The study included 80 young adults, ages 18–30 who volunteered to participate in a study. The researchers excluded people with neurological disorders, mental health issues, heavy alcohol use, or other drug use. Participants were informed that they would be completing research on learning and memory and, prior to the onset of the study, were required to disclose their alcohol and marijuana use in a general health form.
Cannabis group (40 participants):
- Reported using cannabis at least 4 times per week for the past 2 years
- Age range: 18–29 years (average age: 23)
- Gender: 22 male, 18 female
- Background: included college students and young professionals
Non-user group (40 participants):
- Reported no regular cannabis use and had not used cannabis in the past year
- Age range: 19–30 years (average age: 24)
- Gender: 20 male, 20 female
- Similar educational and socioeconomic backgrounds to the cannabis group
Methods Participants completed memory tests, such as remembering lists of words and recalling short stories and were scored on a total of 30 questions. These tasks were designed to measure different aspects of memory such as immediate recall (short-term), delayed recall (longer-term memory), working memory (keeping information active in your mind), and recognition memory (identifying something seen before). While doing these tasks, some participants also underwent brain scans that measured dopamine release in regions related to learning and reward. Researchers then compared memory performance scores with each participant’s self-reported weekly cannabis use.
Cannabis and Dopamine Study Article Analysis Question - AAQ (FRQ)
Source 1.2
Results and Discussion
| Group | Mean Memory Score | |--------------------|--------------------------| | Cannabis users | 22 (73% accuracy) | | Non Cannabis users | 26 (86% accuracy) |
The results showed that heavier cannabis use was linked to lower memory test scores. Frequent users also showed reduced dopamine activity during tasks compared to non-users in brain scans of dopamine brain regions. This suggests that long-term cannabis use may interfere with the brain’s ability to process and recall information, partly because THC disrupts normal dopamine signaling. THC also binds to receptors in the hippocampus, the brain’s main memory center. Heavy cannabis use may disrupt normal activity there, making it harder to store and retrieve memories.
Question 1a
Identify the research method used in this study.
Question 1b
State the operational definition of 'memory performance'.
Question 1c
Identify the strength of the results depicted in the graph of the data set. What does the coefficient r = -.86 reveal about the findings?
Question 1d
Identify at least one ethical guideline applied by the researchers.
Question 1e
Explain the extent to which the research findings can or can not be generalized based on evidence from the study.
Question 1f
Explain how at least one of the research findings supports or refutes the researchers' hypothesis that frequent cannabis use is related to weaker memory and changes dopamine.
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