The literature focuses primarily on negative events that cause depression and anxiety and how genetic factors play a role for susceptibility to the illnesses. The two illnesses are usually comorbid in that they are pertained in the same genetic risk factor, (Roy, Neale, Pedersen, Mathe ́, & Kendler, 1995 and Gunthert et al., 2007). Depression is clinically catogerised in the DSM- IV-TR as loss of interest or pleasure that lasts longer than two weeks with at least five of the following symptoms being present. The person’s normal functionality in regards to their social, occupational or educational standards are impaired. Indicators are significant weight changes, sleep patterns, activity, fatigue, guilt/ worthlessness reduced concentration and thoughts or attempts of suicide. (Diagnostic and Statistical Manual of Mental Disorders, 2000). For Anxiety its symptoms must remain persist for at least six months, with three or more of the six symptoms being present more days than not. Controlling worrying becomes increasingly difficult. It also incldes feeling restlessness, easily fatigued, concentration diminished, irritable, muscle tension and sleep disturbance. (Diagnostic and Statistical Manual of Mental Disorders, …show more content…
(Hakin, Fraley, Lahey, & Waldman, 2005). Apart from this successful studies do report negative events as being typical applicators of the onset of depression and anxiety. Though the studies have been criticized for having being sampled in mainly college students such as, Hirsh & Barton, (2011); Schwartz, (2006) and Tomoda (1997) similar studies which have sampled adults, the elderly, religious groups, race and gender, Uddin et al., (2010) and Garnefski & Diekstra, (1995) have been successful in reducing the implications of ecological validity of using students as samples. (Rowe, Walker, Britton & Hirsch,