Varying the Type and Number of Adaptive Variables in Continuous Tracking

To investigate the effectiveness of various types and numbers of adaptive variables, 48 subjects performed a two-dimensional pursuit tracking task for five 3-min training sessions. In the factorial design resulting in eight experimental conditions, three variables (frequency of the forcing function, ratio of acceleration to rate control, and control stick sensitivity) were either fixed or adaptive. A transfer and retention task in which the tracking situation changed periodically was used to evaluate the ability of subjects to adjust to change. Each adaptive variable was analyzed separately in training. The highest rate of adaptation in frequency occurred when frequency was the only adaptive variable. The rate of adaptation in acceleration was greater early in training when frequency also adapted. More adaptation occurred in gain when another variable also adapted. During transfer subjects trained adaptively generally showed more stable performance in the changing task situation. No reliable differences among conditions appeared in retention. Results are discussed in terms of stimulus and response similarity, the optimum number of adaptive variables, and the appropriateness of a changing task to evaluate adaptive training.     

Women’s Health Promotion in the Rural Church: A Canadian Perspective

The rural church may be an effective health resource for rural Canadian women who have compromised access to health resources. The purpose of this paper is to explore the relevance of the Christian church and faith community nurses in promoting the health of rural Canadian women in the evolving rural context. The findings from an extensive literature search reveal that religion and spirituality often influence the health beliefs, behaviors, and decisions of rural Canadian women. The church and faith community nurses may therefore be a significant health resource for rural Canadian women, although this phenomenon has been significantly understudied.     

Deterring Anger and Anger-Motivated Behaviors

Two experiments were carried out to explore an anger-reducing strategy based on Brehm's emotional intensity theory. According to this theory, anger can be reduced indirectly by interfering with the feeling of anger rather than by dealing directly with the source of anger. One strategy involves providing the angered person with a reason for feeling happy. We predicted that anger intensity would be reduced not only by a large reason for feeling happy, such as a large gift, but also by a small reason, like a tiny gift. A medium-size gift was expected to maintain anger at approximately its instigated level. Both experiments instigated anger by personal insult and then measured the intensity of felt anger and retaliation after either no further treatment, or a small, a moderate, or large irrelevant gift was presented. The results for felt anger and retaliation confirmed our theoretical expectations.     

Preliminary validation of a hope scale for a rare health condition using web-based methodology

An evaluation of a health condition-specific hope scale adapted from the more general dispositional Hope Scale (Snyder et al., 1991) is provided. Participants (N = 202) with a rare, debilitating, and potentially stigmatising health condition were recruited from readers of the Anal Fissure Self Help Page. Data were gathered anonymously using an online survey linked to the website. Consistent with hope theory, this new measure yielded a pathways factor (perceived capacity to find ways to achieve desired goals) and an agency factor (perceived motivation to pursue goals energetically). Respondents with stronger pathways thoughts reported greater benefits from website information for understanding and generating strategies for managing anal fissures. Stronger agency beliefs were related to more frequent website visits, more rereading of first-hand patient accounts, and shorter duration of fissure symptoms. Results offer preliminary support for validity of this scale and for using web-based methodologies to study conditions, such as anal fissure.     

Opposite effects of anxiety and depressive symptoms on executive function: The case of selecting among competing options

People constantly face the need to choose one option from among many, such as when selecting words to express a thought. Selecting between many options can be difficult for anyone, and can feel overwhelming for individuals with elevated anxiety. The current study demonstrates that anxiety is associated with impaired selection across three different verbal tasks, and tests the specificity of this finding to anxiety. Anxiety and depression frequently co-occur; thus, it might be assumed that they would demonstrate similar associations with selection, although they also have distinct profiles of symptoms, neuroanatomy and neurochemistry. Here, we report for the first time that anxiety and depressive symptoms counter-intuitively have opposite effects on selection among competing options. Specifically, whereas anxiety symptoms are associated with impairments in verbal selection, depressive symptoms are associated with better selection performance. Implications for understanding the mechanisms of anxiety, depression and selection are discussed.     

Non-g residuals of the SAT and ACT predict specific abilities

This research examined whether non-g residuals of the SAT and ACT subtests, obtained after removing g, predicted specific abilities. Non-g residuals of the verbal and math subtests of the SAT and ACT were correlated with academic (verbal and math) and non-academic abilities (speed and shop), both based on the Armed Services Vocational Aptitude Battery. Non-g residuals of the SAT and ACT math subtests were positively related to math ability and negatively to verbal ability, whereas the opposite pattern was found for the verbal subtests. Non-g residuals of both sets of subtests were weakly related to non-academic abilities. The results support an investment theory of skills and abilities: Investing in skills in one area (e.g., math) improves abilities in that area but lowers abilities in competing areas (e.g., verbal).     

“Prison Will Either Make Ya or Break Ya”: Punishment,Deterrence, and the Criminal Lifestyle

Although a prison sentence is often considered to be among the worst punishments that the state can provide, previous research indicates that offenders do not necessarily share this view. Some inmates, for example, adjust to prison life with relative ease, do not view their time in prison as severe punishment, and may even prefer prison to alternative sanctions such as boot camp or probation. To help explain such views, we point to the utility of a “criminal lifestyle” perspective. We argue that offenders who are committed to the values of the criminal subculture tend to view prison in a unique way. For various reasons, such offenders are less likely than others to view imprisonment as difficult or severe and they are less likely to be deterred by prison. Drawing on data from a large inmate survey, we find initial empirical support for these arguments. Implications for deterrence and future research are discussed.     

Nanoscale inclusions in the phonon glass thermoelectric material Zn4Sb3

We have investigated the thermoelectric material Zn₄Sb₃ using transmission electron microscopy (TEM). Nanoscale inclusions with a diameter of about 10 nm were observed, constituting on the order of 1% by volume of the material. Studies using energy filtered imaging, electron diffraction, and high-angle annular dark-field STEM indicate that the inclusions consist of Zn. These inclusions are expected to scatter the medium and long-wavelength phonons effectively, thus contributing to phonon glass behavior which results in the exceptionally low thermal conductivity for this thermoelectric material.