news LIFE How does cannabis affect memory? While short-term impacts have been well-documented, less is known about the long-term outlook By Sam Riches We still have a limited understanding of any potential long-term memory impact from cannabis consumption. / Photo: Lars HagbergLARS HAGBERG/AFP/Getty Images Cannabis that is high in THC is believed to have a negative impact on short-term memory, and could potentially even trigger psychosis. / Photo: wildpixel / iStock / Getty Images Plus / Photo: wildpixel / iStock / Getty Images Plus