Early-life education may help bolster declarative memory in old age,especially for women

ABSTRACT

Although declarative memory declines with age, sex and education might moderate these weaknesses. We investigated effects of sex and education on nonverbal declarative (recognition) memory in 704 older adults (aged 58–98, 0–17 years of education). Items were drawings of real and made-up objects. Age negatively impacted declarative memory, though this age effect was moderated by sex and object-type: it was steeper for males than females, but only for real objects. Education was positively associated with memory, but also interacted with sex and object-type: education benefited women more than men (countering the age effects, especially for women), and remembering real more than made-up objects. The findings suggest that nonverbal memory in older adults is associated negatively with age but positively with education; both effects are modulated by sex, and by whether learning relates to preexisting or new information. The study suggests downstream benefits from education, especially for girls.     

Standing out and not fitting in: The Dark Triad traits and social values

ABSTRACT

We replicated and extended (N = 207) work on the social values (i.e., obedience, tradition, security, benevolence, universalism, self-direction, stimulation, hedonism, achievement, and power) linked to the Dark Triad traits (i.e., narcissism, psychopathy, and Machiavellianism). Each of the traits was positively associated with values of achievement and power. Psychopathy and narcissism were both negatively correlated with benevolence, and psychopathy and Machiavellianism were negatively correlated with obedience. Psychopathy was also negatively correlated with tradition. Sex differences in the values of tradition, benevolence, and power were mediated by psychopathy. We suggest that high rates of the Dark Triad traits facilitate, for men, holding social values that emphasize standing out whereas low rates facilitate, for women, fitting in.     

Multi‐Criteria Ratios: What is the Unit?

When Analytic Hierarchy Process ratios are normalized to sum to unity, the unit of measure becomes obscure. This paper investigates this obscurity and whether ratio measurement is possible when there is no prior knowledge of the measurement unit. Initially, we look at ratio scales of tangible attributes of objects with well‐known measures. Then, ratio scales of unknown intangible attributes of objects are analysed. We discover that natural zero and a specific unit of measure are not necessarily used explicitly in deriving ratio scale measures. Nevertheless, the derived scale does have a derived unit of measurement. We conclude that although composite multi‐criteria answers are possible in ratio form, it is important to know that a unit of measure exists if ambiguities are to be avoided. Copyright © 2011 John Wiley & Sons, Ltd.