Alcohol use affects sleep duration among military couples

Alcohol misuse and sleep disorders are highly comorbid, prevalent among service members and their romantic partners, and affected by relationship interdependence. As most military health research focuses on either service members or their spouses, the current study examined dyadic effects of alcohol use on sleep cycle duration in dating and married military couples (N = 149 dyads), using data from the National Longitudinal Study of Adolescent Health. Person-level results from a series of multilevel path models showed partial support for our focal hypothesis implicating high alcohol use in shortened average sleep duration for the service members and their romantic partners. Specifically, partners of service members who drank more regularly had shorter average sleep durations, as did female service members who drank more alcohol per drinking occasion. At the couple-level, a partner effect indicated that service members’ lower depressive symptoms were associated with their partner’s shorter average sleep durations. In addition, when service members reported relatively high alcohol-related problems, their partner tended to have a shorter average sleep duration. In contrast, when service members’ partners reported relatively high alcohol-related problems, they had a longer average sleep duration. This suggests the consequences of problematic alcohol use for service members’ partners depended on each dyad member’s drinking patterns. Taken together, these findings underscore the importance of viewing military couples as a dyadic unit in research studies and clinical interventions.     

How Implicit–Explicit Consistency of the Intelligence Self‐Concept Moderates Reactions to Performance Feedback

At present, it is not well understood which individual characteristics determine whether individuals will benefit or suffer from feedback about suboptimal performance. Three separate studies tested the idea that individuals' reactions to (neutral versus negative; positive versus negative) feedback as either improving or deteriorating performance in intelligence tests depended on their explicit and implicit self‐concept of intelligence (eSCI and iSCI). In all studies (Study 1, N = 177; Study 2, N = 165; Study 3, N = 132), persons with low eSCI/high iSCI showed a boost in performance after negative feedback, whereas persons with any other combination showed a decline in performance. The studies also provide an explanation for these effects in terms of mediating mechanisms. Whereas the performance boost of individuals with low eSCI/high iSCI can be best explained by achievement‐related reactance (Studies 2 and 3) and decrease in ruminative thinking (Study 3), the performance declines in the other configurations were mediated by decreased achievement motivation, increased frustration and increased outrage (Study 3). All these mediating mechanisms proved independent and incremental in a bootstrapping‐based moderated meditation analysis. The results are discussed in light of the construct validity of our Implicit Association Test (IAT) and IATs in general. Copyright © 2013 John Wiley & Sons, Ltd.     

On the Road to the Unconscious Self: Understanding when People Gain Self‐knowledge of Implicit Disgust Sensitivity from Behavioural Cues

On the basis of an integration of dual‐process models of information processing and the lens model framework of person perception, we conducted two studies to investigate whether self‐perceivers could detect their implicit disposition from video feedback of behavioural cues and whether these cues were used for explicit dispositional inferences under conditions that maximized the presumed self‐perception process. Using an approach that differed from previous research, we used the following: (i) a more detailed and stepwise self‐perception procedure; (ii) a specific explicit measure compared with a global explicit measure; and (iii) disgust sensitivity as a domain with clear, unambiguous cues and an assumed low self‐presentation bias. The results from two studies (N = 117 and N = 130) on disgust sensitivity provide the first evidence for the assumed process with regard to bodily reaction cues but not with regard to facial expression cues. These novel findings suggest that people can get to know their unconscious selves better if supporting conditions are met and the right behavioural cues are attended to. Additional boundary conditions of this self‐perception process were investigated using display rules and need for closure in Study 2. Copyright © 2013 John Wiley & Sons, Ltd.     

Rasch analysis of a simplified Beck Depression Inventory

Depression is one of the most clinically relevant mood disorders, and many assessment instruments have been developed to measure it. Probably the most frequently used instrument is Beck’s Depression Inventory (BDI). The simplified BDI (BDI-S) is a more efficient version of the BDI that has been shown to be no less reliable or valid. As the BDI-S has not yet been subjected to rigorous tests of Item Response Theory, it is the aim of the present paper to conduct such an analysis using the Rasch model. This study subjected a simplified version of the BDI consisting of 20 items (BDI-S20) to a Rasch analysis in a sample of N = 5,035 participants. The scale, minus one misfitting item (BDI-S19), yielded a good approximation to Rasch assumptions. Moderate differential item functioning (DIF) was present. It is concluded that the BDI-S19 is an internally valid instrument for assessing depression, although some room for improvement exists.     

Short- and Long-Term Effects of Inpatient Cognitive-Behavioral Treatment of Adolescents With Anxious-Depressed School Absenteeism: A Within-Subject Comparison of Changes

The effects of inpatient treatment, including manual-guided cognitive-behavioral treatment (CBT), were examined for 36 adolescents (12–18 years) with chronic school absenteeism and mental health problems. Using a within-subject control group design, no changes were noted during the untreated waiting period, whereas there was a strong, statistically significant reduction in school absence rates and mental health problems from the start to the end of inpatient treatment. At discharge, 88.9% of adolescents attended school regularly or were employed (86.1 and 63.9% at 2- and 9-months follow-up, respectively). Self- and parent-reported mental health problems were significantly reduced during treatment and remained stable during follow-up.     

Secular IQ increases by epigenesis? The hypothesis of cognitive genotype optimization

The short timescale of massive secular IQ gains ("Flynn Effect") is inconsistent with positive selection of a recent gene mutation, but other genetic mechanisms are possible. Principles of evolutionary psychology, combined with secular trends, suggest an epigenetic explanation: the Cognitive Genome Optimization Hypothesis. Per life-history theory, favorable secular trends may change the phenotypic expression of the genotype which controls the neurophysiology of problem solving. The hypothesis posits two intermediate steps between reliable nutrition (the starting point) and higher IQs (ending point): (1) Earlier cognitive maturation and (2) further calibration of cognitive function by reliable social resources (cultural complexity, mandatory education). Unlike earlier generations, more resources can be deployed to cognitive maturation than to physical survival, and more time is available to calibrate cognitive processing into the upper end of the trait value range for intelligence. The secular trend of earlier puberty timing is critical: data show an association between puberty and higher IQ.     

A misleading review of response bias: comment on McGrath, Mitchell, Kim, and Hough (2010)

In the May 2010 issue of Psychological Bulletin, R. E. McGrath, M. Mitchell, B. H. Kim, and L. Hough published an article entitled "Evidence for Response Bias as a Source of Error Variance in Applied Assessment" (pp. 450-470). They argued that response bias indicators used in a variety of settings typically have insufficient data to support such use in everyday clinical practice. Furthermore, they claimed that despite 100 years of research into the use of response bias indicators, "a sufficient justification for [their] use… in applied settings remains elusive" (p. 450). We disagree with McGrath et al.'s conclusions. In fact, we assert that the relevant and voluminous literature that has addressed the issues of response bias substantiates validity of these indicators. In addition, we believe that response bias measures should be used in clinical and research settings on a regular basis. Finally, the empirical evidence for the use of response bias measures is strongest in clinical neuropsychology. We argue that McGrath et al.'s erroneous perspective on response bias measures is a result of 3 errors in their research methodology: (a) inclusion criteria for relevant studies that are too narrow; (b) errors in interpreting results of the empirical research they did include; (c) evidence of a confirmatory bias in selectively citing the literature, as evidence of moderation appears to have been overlooked. Finally, their acknowledging experts in the field who might have highlighted these errors prior to publication may have prevented critiques during the review process.     

What gives victims satisfaction when they seek revenge?

The present paper aims to elucidate under what conditions victims of injustice who seek revenge feel satisfied and perceive that everybody got what he or she deserved. Two hypotheses are discussed: The comparative suffering hypothesis states that seeing the offender suffer from fate is sufficient for evoking satisfaction and perceptions of deservingness among victims. The understanding hypothesis states that revenge can only be satisfactory when the offender understands it as a response to his or her prior behavior. These hypotheses were tested in three experimental studies. The comparative suffering hypothesis received only weak support. The understanding hypothesis, on the other hand, received much stronger support: When the offender understood revenge as punishment, revenge led to satisfaction and deservingness among victims. These findings are discussed with regard to the question why people take revenge. Copyright © 2010 John Wiley & Sons, Ltd.     

Visual detection and identification are not the same: evidence from psychophysics and fMRI

Sometimes object detection as opposed to identification is sufficient to initiate the appropriate action. To explore the neural origin of behavioural differences between the two tasks, we combine psychophysical measurements and fMRI, specifically contrasting shape detection versus identification of a figure. This figure consisted of Gabor elements being oriented differently from those in the background. We equalized performance levels for detection and identification by adjusting orientation differences accordingly for each observer. Hence, stimulus saliency was constant for both tasks allowing a differentiation between the activations specific for detection versus identification processes. Identification yielded higher psychophysical thresholds, slower reaction times and increased hemodynamic activations in the lateral-occipital complex (LOC) and an adjacent area in the collateral sulcus (CoS). Additional analysis using cortex-based alignment revealed four voxel-clusters differentially activated by the tasks, situated in the inferior parietal lobe, the precuneus, the anterior cingulum and the medial frontal gyrus. Our results indicate partly separated cortical mechanisms for object detection and identification.     

Placebo-mediated, Naloxone-sensitive suggestibility of short-term memory performance

Physiological studies of placebo-mediated suggestion have been recently performed beyond their traditional clinical context of pain and analgesia. Various neurotransmitter systems and immunological modulators have been used in successful placebo suggestions, including Dopamine, Cholecystokinin and, most extensively, opioids. We adhered to an established conceptual framework of placebo research and used the μ-opioid-antagonist Naloxone to test the applicability of this framework within a cognitive domain (e.g. memory) in healthy volunteers. Healthy men (n=62, age 29, SD=9) were required to perform a task-battery, including standardized and custom-designed memory tasks, to test short-term recall and delayed recognition. Tasks were performed twice, before and after intravenous injection of either NaCl (0.9%) or Naloxone (both 0.15 mg/kg), in a double-blind setting. While one group was given neutral information (S-), the other was told that it might receive a drug with suspected memory-boosting properties (S+). Objective and subjective indexes of memory performance and salivary cortisol (as a stress marker) were recorded during both runs and differences between groups were assessed. Short-term memory recall, but not delayed recognition, was objectively increased after placebo-mediated suggestion in the NaCl-group. Naloxone specifically blocked the suggestion effect without interfering with memory performance. These results were not affected when changes in salivary cortisol levels were considered. No reaction time changes, recorded to uncover unspecific attentional impairment, were seen. Placebo-mediated suggestion produced a training-independent, objective and Naloxone-sensitive increase in memory performance. These results indicate an opioid-mediated placebo effect within a circumscribed cognitive domain in healthy volunteers.