reductionism vs holism

• reductionism is the idea that behaviour is explained by breaking it down into smaller parts and then studying these parts
• holism is the belief that things are best understood as wholes, rather than being broken down into their constituent parts
• Levels of explanation are used in reductionism to categorise different explanations for reductionism
• the levels of explanation are sppepn: socio-cultural, psychological, physical, environmental/behavioural, physiological, neurochemical.
• neurochemical example in OCD: increased serotonin hormone
• physiological explanation OCD example: basal ganglie and orbitofrontal cortex
• physical explanation example in OCD: washing hands frequently
• psychological explanation in OCD: anxiety and fear of being far from house