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Methods in psychology In order to quantify the data obtained from the experimental and empirical observations carried out, this science uses a wide variety of methods: - Performance measurements, - reaction time measurements, - brain electrical deductions, - behavioural tests, - questionnaires, - assessments by trained observers. If, for example, the emotional warmth of the person being examined is to be measured in a talk therapy, interfering factors must be eliminated in the test procedure or already in the planning and there must be accompanying control measurements - domyhomework.club/ . Statistical methods are indispensable, since only statistics can be used to check whether the measured test results support the theoretical expectations and whether the correlations or interactions that occur are pure chance or deviate systematically. Huge amounts of data can be ordered, sifted and structured by statistics. Purely qualitative methods have become completely irrelevant in scientific psychology, as they do not deliver meaningful results. The facial expression Compared to gestures and other forms of body language - help me with my biology homework , it is the face that offers the most immediate and reliable information about the emotional state of our communication partners. It represents a rich source of statements, and it can be searched for almost two dozen different types of information. Even motionless without any facial expressions, it allows conclusions to be drawn about identity, gender and human group on the basis of physiognomy and skin pigments. Gradual changes, for example changes in the extent and colour of the hairstyle or the formation of wrinkles can be used to recognise age and physical condition. And finally, the rapid changes through muscle movements; they give us the immediate information about emotions or intentions in the interaction with our fellow human beings. The behaviour of the face for social interaction is so central that the recognition of faces and the imitation of facial expressions are among the first perceptual, motor skills that babies acquire - same day essay . This skill is necessary for distinguishing others and arguably because the face is the primary centre of both verbal and non-verbal communication. Read more: Biology Economic goods Principle of permanence Thermodynamics Sub-areas of biology