Scale factors of the thermospheric density ‐ a comparison of SLR and accelerometer solutions

The task of this paper is to identify a set of subjective factors that affect the decision-making in the family about the birth of the second and subsequent children. For the broadest possible description of the phenomenon under study, the method of slightly-structured interviews was used. To assess the severity of the established subjective factors based on the analysis of qualitative interviews, a questionnaire consisting of two parts was developed and tested. The first part is intended for parents of any children, the second — only for parents of children with special needs. The questionnaire was completed by 122 women with at least one child. 75 of the respondents had a child with special needs and completed both parts of the questionnaire. 92 respondents lived in Russia, the rest respondents lived in English-speaking countries. Based on the results of responses for each part of the questionnaire, an exploratory factor analysis was performed using the principal component method with Kaiser normalization. As a result, the first part of the questionnaire revealed 11 significant scale-factors, and the second part — 3 significant scale-factors. Since the survey was conducted with both Russian-speaking and English-speaking respondents, the questionnaire is available in two versions (in two languages). This questionnaire will be useful for building correctional and rehabilitation work with parents of children with disabilities. The authors are ready to provide the questionnaire to interested specialists (free of charge).

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Legibility Study of Selected Scale Characteristics for Moving-Tape Instruments

Human Factors The Journal of the Human Factors and Ergonomics Society ◽

10.1177/001872086500700606 ◽

1965 ◽

Vol 7 (6) ◽

pp. 545-555 ◽

Cited By ~ 2

Author(s):

Barbara J. Kelso

Keyword(s):

Air Force ◽

Reaction Times ◽

Scale Factor ◽

Verbal Response ◽

Scale Factors ◽

Scale Characteristics ◽

The Mean ◽

Standard Deviations ◽

Vertical Scales ◽

Speed And Accuracy

A legibility study was performed to investigate the effects of scale factors, graduation marks, orientation of scales, and reading conditions on the speed and accuracy of reading moving-tape instruments. Each of 150 Air Force Officers made 150 self-paced readings from slides of hand drawn tape instruments. Error was expressed as the magnitude of deviation of a subjects' verbal response from the set scale value. An analysis of variance was performed on the mean error scores, standard deviations of error, mean reaction times, and standard deviations of reaction times. The results clearly favored the 1 7/8 inch scale factor over the 1 3/8 inch and the 2 3/8 scale factor. The use of 9 graduation marks was superior to either 0, 1, 3, or 4 graduation marks. Reading conditions had little effect on performance. Horizontal scales were read more rapidly but no more accurately than vertical scales.

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