Related Experiment Video
Updated: Feb 2, 2026

Employing Aeroponic Systems for the Clonal Propagation of Cannabis
Published on: December 1, 2021
Community variation in adolescent cannabis use in Australia and the Netherlands
B Rowland1, H Jonkman2, J Williams3
1Deakin University, Centre for Social and Early Emotional Development, School of Psychology, Geelong 3216, Australia.
Background:
While controversial, cannabis use is common, and often begins in adolescence. In Australia and the Netherlands, cannabis use is understood and legislated within a harm-minimisation framework. In Australia it is illegal to purchase or consume cannabis. Cannabis use in the Netherlands is illegal, except in licensed coffee shops where the sale and consumption of small amounts (5 g) are permitted.
Methods:
Secondary school aged children in Victoria, Australia and the Netherlands were surveyed using the same culturally adapted questionnaire, designed to measure community rates of substance use and risk factors. Youth cannabis use and predictors of use were compared between the two countries.
Results:
Similar levels of cannabis use in the last month were reported in Australia and the Netherlands (4.5%), with slightly lower use amongst girls, compared to boys. Common predictors of use were found in both the Australian and Netherlands sample.
Conclusions:
The findings suggest that interventions that effectively target similar risk factors to reduce or prevent cannabis use may have applications cross-nationally.
Related Concept Videos
What are Populations and Communities?
What is Variation?
The range, standard deviation, standard error, and variance are the different measures of variation.
Range: The range is the difference between its maximum and...
Variation
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
Cognitive Development During Adolescence
Conservative Site-specific Recombination and Phase Variation
The recognition sites for Cre recombinase called LoxP...
Variation of Atmospheric Pressure
Assuming the air temperature is constant at a given altitude and that the ideal gas law of thermodynamics describes the atmosphere to a good approximation, one can find the variation of atmospheric pressure with height.
Let p(y) be the atmospheric pressure at...

