Amphetamine like adderall,vyvanse are weaker because they do not have a methyl group. adding a methyl group to amphetamine makes N-Methylamphetamine. a Methyl group makes it much more potent therefore you need less to get high and it is much more powerful.
for more info go to
https://psychonautwiki.org/wiki/Adderall
https://psychonautwiki.org/wiki/Meth
Yes that is correct, self-efficacy is being applied
Claire lost weight thanks to the support and encouragement of her
friends. They helped her stick to a healthy diet and pushed her to
engage in physical exercise every day. Identify the factor that helped her lose weight.
- social environment
Where it allows you to have a certain amount of food