Schwangerschaft und Sucht

At 65.7 billion € per year, addiction is the fifth most cost-intensive psychiatric disorder in Europe. More than 60,000 pregnant women in the EU are chronic illicit substance abusers, of which about half consume opioids. One third of these women are of childbearing age, with increasing tendency. More than 60% also suffer from at least one comorbid psychiatric disorder. State-of-the-art treatment for opioid dependence in pregnancy is maintenance therapy with the synthetic opioids methadone or buprenorphine in a multiprofessional setting with comprehensive medical care for women and neonates. A standardized approach of assessment and treatment comparable to the approach in pregnant women is recommended for neonates and for the related neonatal abstinence syndrome (NAS), which occurs in about 60% after intrauterine opioid exposure. An early investment in a multiprofessional treatment model increases not only quality of life of women and children but also lowers societal costs.     

Generalizing prosodic patterns by a non-vocal learning mammal

Prosody, a salient aspect of speech that includes rhythm and intonation, has been shown to help infants acquire some aspects of syntax. Recent studies have shown that birds of two vocal learning species are able to categorize human speech stimuli based on prosody. In the current study, we found that the non-vocal learning rat could also discriminate human speech stimuli based on prosody. Not only that, but rats were able to generalize to novel stimuli they had not been trained with, which suggests that they had not simply memorized the properties of individual stimuli, but learned a prosodic rule. When tested with stimuli with either one or three out of the four prosodic cues removed, the rats did poorly, suggesting that all cues were necessary for the rats to solve the task. This result is in contrast to results with humans and budgerigars, both of which had previously been studied using the same paradigm. Humans and budgerigars both learned the task and generalized to novel items, but were also able to solve the task with some of the cues removed. In conclusion, rats appear to have some of the perceptual abilities necessary to generalize prosodic patterns, in a similar though not identical way to the vocal learning species that have been studied.     

Setting things straight: A comparison of measures of saccade trajectory deviation

In eye movements, saccade trajectory deviation has often been used as a physiological operationalization of visual attention, distraction, or the visual system’s prioritization of different sources of information. However, there are many ways to measure saccade trajectories and to quantify their deviation. This may lead to noncomparable results and poses the problem of choosing a method that will maximize statistical power. Using data from existing studies and from our own experiments, we used principal components analysis to carry out a systematic quantification of the relationships among eight different measures of saccade trajectory deviation and their power to detect the effects of experimental manipulations, as measured by standardized effect size. We concluded that (1) the saccade deviation measure is a good default measure of saccade trajectory deviation, because it is somewhat correlated with all other measures and shows relatively high effect sizes for two well-known experimental effects; (2) more generally, measures made relative to the position of the saccade target are more powerful; and (3) measures of deviation based on the early part of the saccade are made more stable when they are based on data from an eyetracker with a high sampling rate. Our recommendations may be of use to future eye movement researchers seeking to optimize the designs of their studies.     

Time of day affects episodic memory in older adults

The neuropsychological test scores of 2030 cognitively normal older adults were examined to evaluate performance patterns as they related to time of day (TOD) at which testing was initiated. Multiple regression analyses were used to examine the association of TOD with scores on seven neuropsychological tests used in the clinical evaluation of dementia. Episodic memory performance was significantly related to TOD, while memory span and verbal fluency were not. Best performance occurred during early morning hours and late afternoon; worst performance occurred mid-day (i.e., noon). These findings may have implications for clinical assessment, the design of research on dementia, and the daily functioning of older adults.     

Pitch chroma discrimination, generalization, and transfer tests of octave equivalence in humans

Octave equivalence occurs when notes separated by an octave (a doubling in frequency) are judged as being perceptually similar. Considerable evidence points to the importance of the octave in music and speech. Yet, experimental demonstration of octave equivalence has been problematic. Using go/no-go operant discrimination and generalization, we studied octave equivalence in humans. In Experiment 1, we found that a procedure that failed to show octave equivalence in European starlings also failed in humans. In Experiment 2, we modified the procedure to control for the effects of pitch height perception by training participants in Octave 4 and testing in Octave 5. We found that the pattern of responding developed by discrimination training in Octave 4 generalized to Octave 5. We replicated and extended our findings in Experiment 3 by adding a transfer phase: Participants were trained with either the same or a reversed pattern of rewards in Octave 5. Participants transferred easily to the same pattern of reward in Octave 5 but struggled to learn the reversed pattern. We provided minimal instruction, presented no ordered sequences of notes, and used only sine-wave tones, but participants nonetheless constructed pitch chroma information from randomly ordered sequences of notes. Training in music weakly hindered octave generalization but moderately facilitated both positive and negative transfer.     

Up or down: the influence of upcoming reinforcement on consummatory and operant behavior

Research has shown that animal subjects that are given a chance to consume a low-valued substance will consume less of it if a high-valued substance will soon be available than they would if the low-valued substance were to remain available (negative consummatory contrast). Research has also shown that subjects that lever press for a low-valued reinforcer will press the lever more often for that reinforcer if they will soon be able to lever press for a high-valued reinforcer than they would if they continue to press for the low-valued reinforcer (positive induction). The present study investigated these different changes in behavior across 3 experiments. The results suggest that the occurrence of contrast or induction does not depend on the type of substances that are used. We argue that further investigation of the contrast vs. induction issue is warranted because it has empirical, theoretical, and applied implications.     

Chickadees fail standardized operant tests for octave equivalence

Octave equivalence occurs when an observer judges notes separated by a doubling in frequency perceptually similar. The octave appears to form the basis of pitch change in all human cultures and thus may be of biological origin. Previously, we developed a nonverbal operant conditioning test of octave generalization and transfer in humans. The results of this testing showed that humans with and without musical training perceive the octave relationship between pitches. Our goal in the current study was to determine whether black-capped chickadees, a North American songbird, perceive octave equivalence. We chose these chickadees because of their reliance on pitch in assessing conspecific vocalizations, our strong background knowledge on their pitch height perception (log-linear perception of frequency), and the phylogenetic disparity between them and humans. Compared to humans, songbirds are highly skilled at using pitch height perception to classify pitches into ranges, independent of the octave. Our results suggest that chickadees used that skill, rather than octave equivalence, to transfer the note-range discrimination from one octave to the next. In contrast, there is evidence that at least some mammals, including humans, do perceive octave equivalence.     

Psychological Defensiveness as a Mechanism Explaining the Relationship Between Low Socioeconomic Status and Religiosity

People who are low in socioeconomic status (SES) are more likely to be religious than their higher status counterparts; however, little research has tested the mechanisms for this relationship. Using data from 90 diverse societies and multilevel path analysis, we replicated findings that individuals low in SES are more religious and furthermore found that in wealthy countries this relationship was mediated by a measure of psychological defensiveness even while controlling for participants' sense of financial insecurities. These results suggest that religious belief may play a psychologically protective role for low SES individuals, independent of realistic economic concerns.     

How do I Analyze Thee? Let Me Count the Ways: Considering Empathy in Couple Relationships using Self and Partner Ratings

In this article we describe some of the benefits and challenges of using self ratings and ratings of the partner to measure empathy and similar terms in couple research. If both members of the dyad are assessed, there will be four measures of the same variable. How to use these 4 measures in research and clinical work is a central question in this paper. We demonstrate 3 different latent models that can be used to analyze these ratings based on different theoretical premises. Using empathy as the independent variable with a longitudinal sample of 275 couples, structural equation models are used to evaluate the strength of these models in predicting relationship satisfaction. The findings indicate that the model that is consistent with the social constructionist perspective that focuses on the perceptions within the same person is a good fit to the data. Other models that compare ratings between members of the dyad do not fit the data well. The results demonstrate that perceptions of empathy do have a significant influence on relationship satisfaction across time, especially for females. However, it is largely males' perceptions of empathy of the self and the partner that influence relationship satisfaction for females.     

An online measure of thought suppression

An online thought-suppression paradigm was developed to test predictions of ironic process theory. Participants concentrated on or suppressed a particular semantic category. Semantic activation was indexed by the latency to name words from the category. In Experiments 1 and 2, an analog intrusion was introduced while participants were trying to suppress the information. Results consistent with ironic process theory were observed using words with polar opposites in Experiment 1 and words without polar opposites in Experiment 2. To determine whether these effects were dependent on the analog intrusion, Experiment 3 replicated Experiment 1 without the intrusion. Concentration generated semantic activation, but suppression exacerbated this activation. The data imply that hyperaccessibility results from efforts to suppress, whereas the processes of thought suppression identified by ironic process theory require the presence of material inconsistent with a desired cognitive state.