Bias and runs in dice throwing and recording: A few million throws

An experimenter threw individually 219 different dice of four different brands and recorded even and odd outcomes for one block of 20,000 trials for each die—4,380,000 throws in all. The resulting data on runs offer a basis for comparing the observed properties of such a physical randomizing process with theory and with simulations based on pseudo-random numbers and RAND Corporation random numbers. Although generally the results are close to those forecast by theory, some notable exceptions raise questions about the surprise value that should be associated with occurrences two standard deviations from the mean. These data suggest that the usual significance level may well actually be running from 7 to 15 percent instead of the theoretical 5 percent.The data base is the largest of its kind. A set generated by one brand of dice contains 2,000,000 bits and is the first handmade empirical data of such size to fail to show a significant departure from ideal theory in either location or scale.The analysis was facilitated by a National Science Foundation grant GS-341 and and its continuation GS-2044X. It forms part of a larger study of data analysis.Mr. Longcor is from Waukegan, Illinois; the other authors are from Harvard University. Dr. Iversen has moved to the University of Michigan.     

Factors shaping condom use among South African university students: a thematic analysis

This study aimed to investigate contextual influences on condom use by South African university students. Twenty one-to-one, semi-structured interviews were conducted with male and female South African undergraduates. The data were thematically analysed. Results revealed that condom use was transient and often unrelated to disease prevention. Condom use was impeded by closer perceived intimacy, gender dynamics, and social stigma against proposing use of condoms in a presumably committed relationship. Public health policies regarding condom, pill and injection pricing / promotion, and religious toleration also hampered condom use, by encouraging a preference over hormonal contraception or proscribing contraceptive measures altogether. The results provide a basis for considering the impact of immediate and wider social contexts on condom use, as proposed by socio-ecological models of HIV risk behaviour.     

Cross-Sectional Survey on Burnout and Musculoskeletal Disorders in Greek and Cypriot Occupational Therapists

Abstract

Background: Occupational therapy is a physically, psychologically and cognitively demanding job. This study aims to explore the epidemiology of musculoskeletal injuries, mental issues, and burnout in occupational therapy practitioners in Greece and Cyprus.

Method: A survey was conducted, including the Patient Health Questionnaire (PHQ-9), the Oldenburg Burnout Inventory, and the Nordic Musculoskeletal Questionnaire.

Results: Out of 247 respondents, 70% reported severe lower back pain, 9.7% of Greek occupational therapists were in the moderate and high PHQ-9 scale, while disengagement and exhaustion were found 2.026 (±0.54) and 2.592 (±0.533) respectively.

Conclusion: High rates of burnout, correlated with psychological and musculoskeletal disorders were identified in both countries. Work-related stress and musculoskeletal disorders may be more evident in countries hit by recession.