Możliwości i sposoby oceny stopnia trudności pytań kwestionariusza
Rostocki, Włodzimierz Andrzej
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Results of the methodological investigations conducted in Włocławek in 1973 are used. By difficult questions are understood such ones as occasion many disturbances in the process that leads to an appropriate answer, the source of these disturbances being the limited intellectual ability of respondents. With the use of the data on the numbers of disturbances, a hierarchy of difficulty of the questions employed in the above–mentioned investigations was established. Comparison of this hierarchy with the test scores of respondents has led the conclusion that the degree of difficulty is determined to much extent by the degree of knowledge of a vocabulary, the latter depending on the educational level. Next, the efficiency of three methods of predicting the degree of difficulty, for a given group of respondents, is verified: 1° the method using the data on the percentage of irrelevant answers, 2° the method of judges, 3° the method of question analysis according to the model of inner reactions of a respondent to a questionnaire question. The best result was obtained with the use of the latter method: the Spearman coefficient of rank correlation between the empirical measure of difficulty (number of disturbances) and the ranking obtained by means of the latter method, attained the value 0,84, its significance level being p <0,05.