Affect is a psychological term for an observable expression of emotion. A person's affect is the expression of emotion or feelings displayed to others through facial expressions, hand gestures, voice tone, and other emotional signs such as laughter or tears. Individual affect fluctuates according to emotional state.
There are over 3,000 different species of cockroaches-some are considered pests while others are beneficial in their natural environment. The three main types of cockroaches commonly found in homes in South Africa include the German cockroach, Oriental cockroach and American cockroach.
There are five species of cockroaches problematic in Sydney. The worst and most common being German cockroaches followed by Oriental, Australian, Smoky Brown and American species of cockroach. In the past the most common location for German cockroaches were in built up, high density living areas such as the C.B.D OF Sydney. As of late major apartment complexes are rising all over Sydney especially along the train lines exasperating the problem.