Distortions due to measurement: standardized, adjust the weight and measure before the investigation, select Tanita scales Japan have error of 100 g, measure Microtoise by 1 mm error level level UNICEF. Guidelines for investigator using the instruments.Skewed flashbacks, recall: minimize by mainly asked questions related to the near past or the habits of the child object to be investigated are easily recalled.Clearly explain the purpose of the study for research subjects.Specific instructions how to answer on each question content of the survey in a clear way.Designing the appropriate question, obviously.Test survey (10 objects) to check the suitability and edit again the question.
đang được dịch, vui lòng đợi..