Fourier analyses: A mathematical and geometric explanation

Fourier analyses are used in electrophysiological research to reduce EEG data to an interpretable, analyzable form. This article outlines the mathematical similarities and differences between Fourier transforms and fast Fourier transforms. A geometric explanation of the application of fast Fourier transforms and a Fourier series to theta-band EEG data is also included in this article.     

Shades of Braitenberg’s Vehicle 5

A model with a hybrid neural network-expert system brain was designed. This model proved to have better memory than that of Braitenberg’s (1984) original simulated vehicles, on which it was based. The parallel nature of the neural network component provided more storage capacity with the same number of neurons, whereas the serial expert system component was able to use the increased memory to make fast, accurate decisions.     

Caregiver religiosity and well-being in dealing with Alzheimer's dementia

To examine the relationship among religious participation, stress, and well-being, 84 caregivers of Alzheimer's patients and 81 control subjects completed the Religiosity Scale, Life-3, and Medical Outcomes Study well-being measures. Caregivers only completed the Relative's Stress Scale. No differences were found between groups in religious practices, although caregivers indicated higher levels of clergy-visiting than the others and control subjects indicated a greater met need for contact with the church or synagogue. In contrast, control subjects show higher levels of well-being, social functioning, and mental health than caregivers. In care-givers, significant relationships were found among several religiosity variables, stress, and well-being.     

An examination of automatic vs. controlled information processing in the employment interview: The case of minority applicants

Sex Roles - Based on the automatic vs. controlled attention argument, this paper tested the contention that the amount of job-relevant information given to decision makers prior to the employment...     

Motherhood in the 21st Century: Implications for Counselors

Although mental health professionals frequently work with mothers, the social construction of motherhood is rarely discussed in the counseling field. In this article, the literature on motherhood is reviewed. Intensive mothering expectations are critiqued, and the impact of these expectations on employed mothers, mothers on welfare, and stay‐at‐home mothers is discussed. Suggestions for mental health professionals are provided.     

Part‐based representations of the body in early childhood: evidence from perceived distortions of tactile space across limb boundaries

Studies show that touch in adults is referenced to a representation of the body that is structured topologically according to body parts; the perceived distance between two stimuli crossing over a body part boundary is elongated relative to the perceived distance between two stimuli presented within one body part category. Here we investigate this influence of body parts on tactile space perception in children of 5, 6 and 7 years of age. We presented children with pairs of tactile stimuli on the left hand/arm, either within the hand, within the forearm, or over the wrist. With their eyes closed children were asked to adjust the distance between the thumb and forefinger of their right hand to represent the felt distance between the two tactile stimuli. Like adults, the children perceived the distance between two stimuli that cross the body part boundary to be further apart than those that were presented within the hand or arm. They also perceive tactile distance to be greater on the hand than the arm which is the first observation of Weber's illusion in young children. We propose that a topological mode of body representation is particularly advantageous during early life given that body part categories remain constant while the metric proportions of the body change substantially as the child grows.     

“Watch out!”: Effects of instructed threat and avoidance on human free‐operant approach–avoidance behavior

Approach–avoidance paradigms create a competition between appetitive and aversive contingencies and are widely used in nonhuman research on anxiety. Here, we examined how instructions about threat and avoidance impact control by competing contingencies over human approach–avoidance behavior. Additionally, Experiment 1 examined the effects of threat magnitude (money loss amount) and avoidance cost (fixed ratio requirements), whereas Experiment 2 examined the effects of threat information (available, unavailable and inaccurate) on approach–avoidance. During the task, approach responding was modeled by reinforcing responding with money on a FR schedule. By performing an observing response, participants produced an escalating “threat meter”. Instructions stated that the threat meter levels displayed the current probability of losing money, when in fact loss only occurred when the level reached the maximum. Instructions also stated pressing an avoidance button lowered the threat level. Overall, instructions produced cycles of approach and avoidance responding with transitions from approach to avoidance when threat was high and transitions back to approach after avoidance reduced threat. Experiment 1 revealed increasing avoidance cost, but not threat magnitude, shifted approach–avoidance transitions to higher threat levels and increased anxiety ratings, but did not influence the frequency of approach–avoidance cycles. Experiment 2 revealed when threat level information was available or absent earnings were high, but earnings decreased when inaccurate threat information was incompatible with contingencies. Our findings build on prior nonhuman and human approach–avoidance research by highlighting how instructed threat and avoidance can impact human AA behavior and self‐reported anxiety.     

Predicting workplace aggression: a meta-analysis

The authors conducted a meta-analysis of 57 empirical studies (59 samples) concerning enacted workplace aggression to answer 3 research questions. First, what are the individual and situational predictors of interpersonal and organizational aggression? Second, within interpersonal aggression, are there different predictors of supervisor- and coworker-targeted aggression? Third, what are the relative contributions of individual (i.e., trait anger, negative affectivity, and biological sex) and situational (i.e., injustice, job dissatisfaction, interpersonal conflict, situational constraints, and poor leadership) factors in explaining interpersonal and organizational aggression? Results show that both individual and situational factors predict aggression and that the pattern of predictors is target specific. Implications for future research are discussed.     

Illness representations and psychological distress in patients undergoing coronary artery bypass graft surgery

Preoperative psychological distress has been shown to predict both postoperative distress and subsequent cardiac morbidity in patients undergoing coronary artery bypass graft (CABG) surgery. This study assessed the associations between illness perceptions and psychological well-being among 56 patients awaiting CABG surgery using the Profile of Mood States (POMS) and the Illness Perception Questionnaire-Revised (IPQ-R). Patient perceptions of their illness as chronic were associated with reduced beliefs in both personal control over illness and efficacy of treatment, and increased perceived consequences of illness in terms of life functioning. In addition, psychological distress regarding illness was significantly correlated with psychological distress in general. Reduced illness coherence was also associated with increased psychological distress. Preoperative psycho-education aimed at helping patients better understand their illness, treatment, and its effects may reduce psychological distress, and perhaps improve future well-being as a result.