Dual task performance in children: generalized and lateralized effects of memory encoding upon the rate and variability of concurrent finger tapping

Interference between concurrent tasks was used to investigate the brain basis of capacity limitations apparent when children encode information. Seventy-three right-handed children in Grades 1-4 engaged in speeded unilateral finger tapping while encoding a variable number of faces or numbers for subsequent recognition testing. With both face and number encoding, tapping rate decreased as memory load increased. Encoding numbers was more disruptive than encoding faces. Both encoding tasks slowed right-hand tapping more than left-hand tapping, relative to control tapping performance, but had only a bilateral effect on the variability of tapping. Although overall interference was less than that observed with a comparison task (i.e., speaking), the asymmetry of interference was comparable. The results suggest that cerebral lateralization for memory encoding, as well as for speech, is constant across the age range of 6-10 years. Findings regarding developmental change in overall capacity, however, are task specific: interference from speaking but not from memory encoding decreases with increasing age.     

The relationship between human resource investments and organizational performance: a firm-level examination of equilibrium theory

It is commonly believed that human resource investments can yield positive performance-related outcomes for organizations. Utilizing the theory of organizational equilibrium (H. A. Simon, D. W. Smithburg, & V. A. Thompson, 1950; J. G. March & H. A. Simon, 1958), the authors proposed that organizational inducements in the form of competitive pay will lead to 2 firm-level performance outcomes--labor productivity and customer satisfaction--and that financially successful organizations would be more likely to provide these inducements to their employees. To test their hypotheses, the authors gathered employee-survey and objective performance data from a sample of 126 large publicly traded U.S. organizations over a period of 3 years. Results indicated that (a) firm-level financial performance (net income) predicted employees' shared perceptions of competitive pay, (b) shared pay perceptions predicted future labor productivity, and (c) the relationship between shared pay perceptions and customer satisfaction was fully mediated by employee morale.     

Assessing the Relationships Among Prayer Expectancies, Race, and Self-Esteem in Late Life

When people pray, they have certain beliefs or expectations about the nature of the response they hope to receive. The purpose of this study is to examine the relationship between two specific prayer expectancies and self-esteem with data provided by a nationwide survey of older adults. The first has to do with the timing of answers to prayers while the second involves the ways prayers are answered. The data suggest that feelings of self-worth are highest when older people believe that only God knows when it is best to answer a prayer, and only God knows the best way to answer it. In contrast, self-esteem tends to be lower among older adults who believe prayers are answered right away and believe they get exactly what they ask for. However, further analysis reveals that the benefits of prayer expectancies are more evident among older African Americans than among older whites.     

Exploring the relationships among age,spiritual struggles,and health

The purpose of this study is to address two issues. First, an effort is made to see if there are age differences in the prevalence of spiritual struggles. Second, tests are performed to see if age differences exist in the relationship between spiritual struggles and physical health. Data from a recent nationwide survey reveal that younger adults report that they encounter more spiritual struggles than either middle-aged or older adults. The findings further indicate that the negative relationship between spiritual struggles and health tends to become more pronounced at successively older ages.     

Measuring Religiousness Among Older African Americans: Exploring Race-of-Interviewer Effects

In recent years a number of studies have explored possible sources of nonrandom error and response bias in survey data on religion. Building on a longstanding body of work in the social sciences, we examine a neglected issue in this domain: the potential for race-of-interviewer effects, specifically in African Americans’ self-reports of various dimensions of religiousness. After outlining two competing perspectives on this issue—which we term racial deference and racial solidarity—we test relevant hypotheses using data from the African American oversample of a nationwide study of older adults. Results indicate that older blacks tend to report higher levels of non-organizational religious practices and subjective religiousness when interviewed by whites. A number of implications and promising directions for future research are discussed.     

Social Relationships in the Church During Late Life: Assessing Differences Between African Americans,Whites, and Mexican Americans

The purpose of this study is to see if there are differences in the social relationships that older African Americans, older whites, and older Mexican Americans form with the people where they worship. Data from two large surveys are pooled to see if race differences emerge in eleven different measures of church-based social relationships. These measures assess social relationships with rank-and-file church members as well as social relationships with members of the clergy. The findings reveal that older African Americans tend to have more well-developed social relationships in the church than either older whites or older Mexican Americans. This is true with respect to relationships with fellow church members as well as relationships with the clergy. In contrast, relatively few differences emerged between older Americans of European descent and older Mexican Americans. However, when differences emerged in the data, older whites tend to score higher on the support measures than older Mexican Americans.     

Reliability of implicit self‐esteem measures revisited

This study investigated the internal consistencies and temporal stabilities of different implicit self‐esteem measures. Participants (N = 101) responded twice—with a time lag of 4 weeks—to five different tasks: the Implicit Association Test (IAT), the Brief Implicit Association Test (BIAT), the Affective Priming Task (APT), the Identification‐Extrinsic Affective Simon Task (ID‐EAST) and the Name‐Letter Task (NLT). As expected, the highest reliability coefficients were obtained for the self‐esteem IAT. Importantly, the internal consistencies and the temporal stabilities of the APT, the ID‐EAST, and the NLT were substantially improved by using material, structural, and analytic innovations. In particular, the use of the adaptive response‐window procedure for the APT, the computation of error scores for the ID‐EAST, and the computation of a double corrected scoring algorithm for the NLT yielded reliability coefficients comparable to those of the established IAT. Implications for the indirect assessment of self‐esteem are discussed. Copyright © 2010 John Wiley & Sons, Ltd.     

The phantom head

A student volunteer was asked to stand just behind a mannequin so that the student was looking at the back of the mannequin's plastic head. The experimenter stood off to one side and used her two hands to stroke and tap the back of the student's head in perfect synchrony with the back of the mannequin's head. After 1-2 min the majority of naive subjects tested began experiencing the sensations as emerging from the mannequin's head rather than from their own, demonstrating a novel 'phantom-head' illusion. The fact that sensory referral here occurs to a part of the body that is not normally visually accessible challenges the leading Hebbian explanation of the well-studied rubber-hand illusion.     

Assessing the relationships among stress,god-mediated control,and psychological distress/well-being: Does the level of education matter?

One of the primary functions of religion is to help people cope with stressful life events. The purpose of the current study is to see if God-mediated control beliefs perform this stress-buffering function. God-mediated control refers to the belief that people work together with God to reduce the effects of unwanted stressors in their lives. An effort is made to probe this relationship more deeply by seeing whether the stress moderating function of God-mediated control beliefs varies across levels of educational attainment. Findings from a recent nationwide survey suggest that strong God-mediated control beliefs reduce the magnitude of the relationship between stress and depressive symptoms, anxiety, happiness, and hope, but only among more highly educated study participants. In contrast, God-mediated control beliefs do not appear to influence the relationship between stress and distress/well-being among study participants with lower levels of educational attainment.     

Emotional support from parents early in life, aging, and health

The purpose of this study is to estimate the relationship between receiving emotional support from parents early in life and an individual's health in adulthood. Analysis of data from a nationally representative sample of adults ages 25-74 years suggests that a lack of parental support during childhood is associated with increased levels of depressive symptoms and chronic conditions in adulthood. These associations between early parental support and adult health persist with increasing age throughout adulthood. Personal control, self-esteem, and social relationships during adulthood account for a large portion of these long-term associations. These findings underscore the importance of adopting a life course perspective in studying the social determinants of health among adults.