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.
German Cockroach (1/2 long) Found throughout the world, this cockroach is often called a waterbug because it locates very close to sources of moisture (especially sinks). It is most commonly found in restaurants, kitchens and stores.The German cockroach has two dark stripes down its back.merican Cockroach (1 _- 2 long) Sometimes referred to as a waterbug or a Palmetto bug, this is the largest common household cockroach. It has reddish brown wings, a light brown body, and a yellow margin around the shield on its back.