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Most of the 'true' hallucinogens are classified as 5HT2A agonists. 5HT2A is a postsynaptic serotonin receptor. Serotonin-specific reuptake inhibitors (SSRIs) on the other hand act by increasing serotonin (5HT) levels in the brain, which in turn activates presynaptic 5HT1A receptors. Due to a continuous stimulation of these 5HT1A receptors they become ...


3

It is common for psychological tests to include multiple items with similar meaning. These items are then combined to form an overall scale score (e.g., depression or depressed thoughts). Multiple items with a similar meaning are used to increase the reliability of measurement, which is also important for validity. I don't think there is a huge difference ...



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