1. Explain The Three Criteria That Must Be Present In A Psychological Disorder?

Question 1: Explain the three criteria that must be present in a psychological disorder.
Psychological disorder is defined by three important criteria which are psychological dysfunction, personal distress and, culturally or typically unexpected response or reaction. When one’s cognitive, emotional or behavioral functioning is breaking down, he or she is facing a psychological dysfunction (Durand & Barlow, 2013). As an example, cockroach is disgusting. However, if it presence is affecting you in the sense that you get anxious, started trembling, unable to think clearly that you might decide to just jump out of the building just to get away from it shows that you are psychologically dysfunctional. Besides that, distinguishing between normal and abnormal dysfunction could be challenging (Durand & Barlow, 2013). Hence, these problems are usually view based on a range or a dimension rather than a definite present or absent (Durand & Barlow, 2013). This explains why the other criteria is important to identify a psychological disorder

In the nervous system, there are neurotransmitters which are “chemical that crosses the synaptic cleft between nerve cells to transmit impulses from one neuron to the next” (Durand & Barlow, 2013). Excessive or deficit amount of neurotransmitters might trigger several psychological disorders. Neurotransmitters function like currents in the brain where sometimes they run in parallel and form a path as according to the sensitivity of the neurons while sometime their path is overlapping with one another (Durand & Barlow, 2013). Hence, they are regard as the brain circuits with tremendous amount in the brain. It is found that, certain kind of behavior are somehow affected by changes in the neurotransmitter activity (Durand & Barlow, 2013).