| Title |
Current and former marijuana use: preliminary findings of a longitudinal study of effects on IQ in young adults.
|
|---|---|
| Published in |
Canadian Medical Association Journal, April 2002
|
| Pubmed ID | |
| Authors |
Peter Fried, Barbara Watkinson, Deborah James, Robert Gray |
| Abstract |
Assessing marijuana's impact on intelligence quotient (IQ) has been hampered by a lack of evaluation of subjects before they begin to use this substance. Using data from a group of young people whom we have been following since birth, we examined IQ scores before, during and after cessation of regular marijuana use to determine any impact of the drug on this measure of cognitive function. |
X Demographics
The data shown below were collected from the profiles of 343 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 53 | 15% |
| Indonesia | 34 | 10% |
| Spain | 29 | 8% |
| Argentina | 15 | 4% |
| Canada | 10 | 3% |
| Japan | 9 | 3% |
| Chile | 8 | 2% |
| United Kingdom | 5 | 1% |
| Mexico | 4 | 1% |
| Other | 39 | 11% |
| Unknown | 137 | 40% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 335 | 98% |
| Practitioners (doctors, other healthcare professionals) | 4 | 1% |
| Scientists | 3 | <1% |
| Science communicators (journalists, bloggers, editors) | 3 | <1% |
Mendeley readers
The data shown below were compiled from readership statistics for 159 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 5 | 3% |
| Canada | 2 | 1% |
| United Kingdom | 1 | <1% |
| Italy | 1 | <1% |
| Argentina | 1 | <1% |
| Sweden | 1 | <1% |
| Unknown | 148 | 93% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 32 | 20% |
| Student > Bachelor | 26 | 16% |
| Researcher | 22 | 14% |
| Student > Master | 15 | 9% |
| Other | 11 | 7% |
| Other | 34 | 21% |
| Unknown | 19 | 12% |
| Readers by discipline | Count | As % |
|---|---|---|
| Psychology | 46 | 29% |
| Medicine and Dentistry | 25 | 16% |
| Agricultural and Biological Sciences | 17 | 11% |
| Social Sciences | 14 | 9% |
| Neuroscience | 7 | 4% |
| Other | 22 | 14% |
| Unknown | 28 | 18% |
Attention Score in Context
This research output has an Altmetric Attention Score of 365. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 13 March 2024.
All research outputs
#89,044
of 25,832,559 outputs
Outputs from Canadian Medical Association Journal
#160
of 9,559 outputs
Outputs of similar age
#29
of 129,155 outputs
Outputs of similar age from Canadian Medical Association Journal
#1
of 41 outputs
Altmetric has tracked 25,832,559 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 9,559 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 34.2. This one has done particularly well, scoring higher than 98% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 129,155 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 41 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 97% of its contemporaries.