The attitude of teachers towards inclusive education is a key issue for the success of inclusive education. Many studies have been designed to assess teachers' attitudes, but none have looked at the bias caused by teachers' non-response to questionnaires on their attitudes. Non-response biases are difficult to identify because it is impossible to…

Short message service (SMS or text messaging) surveys can collect data quickly and inexpensively. However, SMS surveys have space constraints that pose difficulties to questionnaire designers: Questions can only be 160 characters or less, surveys must be short, and many respondents use phones with small screens. In this article, we compare SMS and…

This study provides support for the hypothesized effect of leniency on the discriminant validity of grouped questionnaire items. It was found that controlling for leniency resulted in a slight decrement in convergent validity but that discriminant validity was substantially improved. Implications for questionnaire validity and further research are…

This brief review of research examines the mail questionnaire as a research tool. Major topics reported are the advantages and disadvantages of mail surveys response rates, and questionnaire construction. Among the advantages reported are ease of distribution and tabulation, the possibility of a large sample and geographic range, low cost,…

The randomized response technique, constructed by Warner (1965), was designed to reduce the number of untruthful responses to sensitive questionnaire items. The present study investigated the effectiveness of this technique for groups differing in the tendency to give socially desirable responses to questionnaire items. A questionnaire concerning…

The non-response bias analysis of data from a stratified nationwide probability sample of high school seniors produced evidence in support of the hypothesis that nonrespondents tend to be of lower "educational level" than respondents. A partial-response bias analysis of the same data indicated that there were similarities between the biases of…

A method of adjusting for bias due to nonresponse to an alumni survey is demonstrated, based upon analysis of data from both on-time and late respondents. The responses are opinions of 254 alumni regarding how they rate their recently completed program of study within a college of an urban university. As part of the university's curriculum review…

The effects of humorous test questions on test performance of high and low-anxious college students was investigated. It was hypothesized that humor should reduce the anxiety level of high-anxious subjects, and thus improve their performance, while having little effect on low-anxious subjects. Students were assigned to a low or high-anxious group…

As in any very large survey, the sample that provided data for the National Longitudinal Study of the High School Class of 1972 (NLS) differed from the random sample of the study design because of nonresponse from 226 of the 1,200 schools in the primary sample, and a small amount of other missing data. Part A of this report, briefly describes the…