The Kuder-Richardson formula (21) as a split-half coefficient,and some remarks on its basic assumption

Case IV of the Kuder-Richardson series, their formula (21), is derived as a generalized split-half Spearman-Brown coefficient. The basic assumption employed is shown to be sufficient to justify the various assumptions used in derivations by other authors. Some of the implications of this assumption are discussed.     

The relationship among sex roles,living arrangements,and the division of household responsibilities

Twenty couples living together, 10 married and 10 unmarried, were given the Bem Sex-Role Inventory and a questionnaire on the performance of household responsibilities. Findings provided partial support for hypotheses relating more traditional sex roles, living arrangements, and division of household responsibilities. Results also indicated a greater variability in household responsibilities for unmarried males and for males and females who were not traditionally sex typed. The latter results support a model which was formulated relating changes in sex-role attitudes with changes in sex-related behavior. In this model, a period of uncertainty intervenes between the change in attitude and the change in related behavior.     

Minimal approximations and Norton’s dome

Synthese - In this note, I apply Norton’s (Philos Sci 79(2):207–232, 2012) distinction between idealizations and approximations to argue that the epistemic and inferential advantages...     

Are Pornography Users More Likely to Experience a Romantic Breakup? Evidence from Longitudinal Data

Previous research suggests that pornography use, under certain circumstances, may negatively influence the quality of romantic relationships. Yet we still know relatively little about whether watching pornography is associated with the stability of romantic relationships later on. This study examined whether Americans who use pornography, either at all or more frequently, are more prone to report experiencing a romantic breakup over time. Longitudinal data were taken from the 2006 and 2012 waves of the nationally representative Portraits of American Life Study (N = 969). Binary logistic regression analyses demonstrated that Americans who viewed pornography at all in 2006 were nearly twice as likely as those who never viewed pornography to report experiencing a romantic breakup by 2012, even after controlling for relevant factors such as 2006 relationship status and other sociodemographic correlates. This association was considerably stronger for men than for women and for unmarried Americans than for married Americans. Analyses also showed a linear relationship between how frequently Americans viewed pornography in 2006 and their odds of experiencing a breakup by 2012. The findings affirm that earlier pornography use is associated with lower stability within Americans’ romantic relationships, especially for men and the unmarried. Data limitations and implications for future research are discussed.