Statistical inferences about true scores

Formulas are derived for unbiased sample estimators of any raw or central moment of the frequency distribution of true scores. A general method is developed for obtaining from each examinee's observed score a least squares estimate of his true score.This research was carried out under contract Nonr-2214(00) with the Office of Naval Research, Department of the Navy.     

Randomly parallel tests and Lyerly's basic assumption for the Kuder-Richardson formula (21)

The K-R (21) formula can be derived without recourse to the undesirable assumption that the test items are all indistinguishable.     

Notes on a problem of multiple classification

A solution is developed in implicit form for the problem of assigningN men ton jobs, the proportion of men to be assigned to each job being specified in advance.The author wishes to thank Dr. Hubert Brogden and Dr. Paul Horst for their helpful discussion and criticism.     

Theoretical frameworks for working with harder to reach families: lines,curlicues, and spirals: comment on Donovan and Pocock

This article comments on the Donovan and Pocock articles appearing in this issue, both of which address the evolution of theory and practice in family therapy. An emphasis is placed on the importance of integration and a shared philosophy of theory and practice in our current political and economic managed care climate, in which it is critically important to embrace the integrated and chaotic whole of what is happening in theory and in practice.     

Chronic stress, cognitive functioning and mental health

This review aims to discuss the evidence supporting the link between chronic stress, cognitive function and mental health. Over the years, the associations between these concepts have been investigated in different populations. This review summarizes the findings that have emerged from older populations as well as from populations suffering from pathological aging, namely Mild Cognitive Impairment and Alzheimer's Disease. Although older adults are an interesting population to study in terms of chronic stress, other stress-related diseases can occur throughout the lifespan. The second section covers some of these stress-related diseases that have recently received a great deal of attention, namely burnout, depression, and post-traumatic stress disorder. Given that chronic stress contributes to the development of certain pathologies by accelerating and/or exacerbating pre-existing vulnerabilities that vary from one individual to the other, the final section summarizes data obtained on potential variables contributing to the association between chronic stress and cognition.     

Effects of Salient Multiple Identities on Women's Performance Under Mathematics Stereotype Threat

Previous research on affective extremity and social identity complexity suggested that women's mathematics stereotype threat might be alleviated by reminding individual women of their multiple roles and identities, most of which would presumably be unrelated and thus impervious to negative stereotypes regarding math performance. To test this hypothesis, we primed the relevant stereotype and then asked men and women college students to draw self-concept maps with many or few nodes. When they drew no maps or maps with few nodes, highly math-identified women scored significantly worse than highly math-identified men on a subsequent Graduate Record Examination-like math test, but when they drew maps with many nodes, they scored as well as those men. Theoretical and practical implications of the results are discussed.     

Patterns of Religious Coping among Bereaved College Students

Contemporary research has suggested that bereavement is a paramount issue in college populations, a group which has historically been underrepresented in grief research (Balk. in Death studies 25:67–84, 2001; Balk et al. in Death Studies 34:459–468, 2010). Indeed, there has been a call to generate new research on grief with specific populations and age groups (Center for the Advancement of Health. in Death Studies 28:568–575, 2004). Religion is often described as a primary way that individuals cope with bereavement in particular (Frantz et al. in Pastor Psychol 44(3):151–163, 1996) and has been shown to effect college student reactions to stress in general (Merrill et al. in Mental Health, Religion & Culture 12(5):501–511, 2009). The RCOPE (Pargament et al. in J Clin Psychol 56(4):519–543, 2000, J Health Psychol 9:713–730, 2004) is a frequently used measure of religious coping, but has not been evaluated with a bereaved undergraduate population. Given that emerging adulthood is a critical developmental phase of religious identity (Fowler. in New Directions for Child Development 3(52):27–45, 1991), the current study examined the factor structure of the RCOPE within a sample of bereaved college students. An exploratory factor analysis was performed, which approximated the factor structure proposed by Pargament et al. (J Clin Psychol 56(4):519–543, 2000). However, a high correlation between the positive and negative religious coping subscales (r = 0.71) detracted from the predictive utility of Pargament et al.′s (2000) two overarching subscales. Therefore, an exploratory factor analysis with an orthogonal rotation was used to identify two uncorrelated subscales (adaptive religious coping and maladaptive religious coping). This new two-factor, 39-item version of the RCOPE was found to demonstrate good internal consistency (α > 0.8) as well as convergent and discriminant validity. The interaction between religious coping strategies and core beliefs about the predictability of the world is explored, and directions for future research and clinical practice are suggested.     

Biserial estimates of correlation

Brogden's coefficient of selective efficiency and Clemans' are more efficient than biserialr when the correlation is high. Some empirical sampling studies are reported comparing the standard errors of these statistics.     

Comparing performance of pupils with high spatial-low numerical and high numerical-low spatial scores on a standardized mathematics test in the United Kingdom

Questions from a national mathematics test taken by over a 1,000 12- and 13-yr.-olds in the United Kingdom were perused for heavily loaded spatial and numerical items. Pupils' answers to the two types of item were examined, and those who answered well in one of the categories but poorly in the other were selected to form two groups, those high in spatial thinking but low in numerical thinking and those high in numerical thinking but low in spatial thinking to assess whether the approaches to solve the item used by each group were different. The two groups did indeed utilize different thinking strategies to solve the questions. For example, questions involving angle and volume, items thought to require a high spatial facility, were answered correctly by the predominantly numerical thinkers as often as by the predominantly spatial thinkers. This would indicate that one of the samples, i.e., numerical thinkers, used a different strategy than the other, i.e., spatial thinkers. This was verified by examination of students' work in the test booklets and personal interviews of them. Also, the same proportion of boys in each group was recorded, but a higher percentage of girls was recorded in the spatial group than in the numerical. This reflected the large number of boys who scored high on the spatial measures also doing moderately well on the numerical items and so, being moved out of the solely spatial group. Since the tests used by mathematics educators to assess learning are so heavily laden with linguistic/analytical rather than holistic/spatial types of questions, pupils high in spatial but low in numerical thinking face a severe handicap in schools.