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The reliability of a research method refers to the consistency of a measure being used, and the ability to replicate that method e.g. someone who weighed them self throughout the day, would expect to see a s...

The dopamine hypothesis of schizophrenia states that symptoms may be caused by an excess of dopamine in the mid-brain and a reduction in dopamine in the prefrontal cortex. This hypothesis came from the findi...

Advantage: It is a quick and easy way of choosing participants for a study as it is based on convenience. Disadvantage: It may not be representative of the target population, potentially producing a sampling...

Firstly, the biological approach assumes that human behaviour can be explained in terms of genes, hormones, evolution and the nervous system hence there is a focus on nature rather than nurture. Secondly, tr...

The social exchange theory relates to relationships. The theory proposes that relationships are based on weighing up the costs and benefits, and if the costs outweigh the benefits, the relationship will resu...