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Validation should be done within two weeks to determine test-retest reliability.

Before validating a questionnaire, hypotheses should be established regarding anticipated differences in scores between various subgroups of the population being studied, as well as regarding any correlations with other studies.

The questionnaire being used should measure what the researchers want to study and should be modifiable to be appropriate for the population being studied.

Parkinson's disease is a common neurodegenerative disorder in elderly people.

The findings show that some of the questions used in the screening phase yield different responses when comparing a hospital group with a community group.

This study also provides a simplified model of questions that may be relevant for screening in the community setting.

This study assesses whether validating screening questionnaire by using a hospital sample yields the same result as a community based sample.

The subjective economic well-being scale consists of five components - economic optimism, subjective income adequacy, current family welfare, financial deprivation, economic anxiety. In validation, tests high scorers (compared with low) are characterized by high estimate of their own income and satisfaction with financial situation, lower emphasis on financial security, high self-esteem, internality and self-confidence in the economic achievements, as well as satisfaction with life. Eksperimental'naâ psihologiâ [Experimental Psychology (Russia)], 2011. Continue Reading The same population sample should not be used for the validation of the questionnaire and the actual clinical study, but the population used for validation should be representative of the population to be used in the study.Sample size is typically 50 to 100 participants, though a larger sample size is sometimes required for validation of a questionnaire.The concept of subjective economic well-being and its measurement is considered and construction and validation of a questionnaire is described. The subjective economic well-being is conceptualized as an individual’s mind-set to current and future economic position.




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