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Nocebo effects can be acquired by verbal suggestion, but it is unknown whether they can be induced through observational learning and whether they are influenced by factors known to influence pain perception, such as pain anxiety or pain catastrophizing. Eighty-five female students (aged 22.5 ± 4.4 years) were randomly assigned to one of three conditions. Participants in the control condition (CC) received information that an ointment had no effect on pain perception. Participants in the verbal suggestion condition (VSC) received information that it increased pain sensitivity. Participants in the social observational learning condition (OLC) watched a video in which a model displayed more pain when ointment was applied. Subsequently, all participants received three pressure pain stimuli (60 seconds) on each hand. On one hand, the ointment was applied prior to the stimulation. Numerical pain ratings were collected at 20-second intervals during pain stimulation. The participants filled in questionnaires regarding pain-related attitudes (Pain Anxiety Symptoms Scale, Pain Catastrophizing Scale, and Somatosensory Amplification Scale). Participants in the OLC showed higher pain ratings with than without ointment. Pain ratings within the CC and the VSC were at the same level with and without ointment. In the VSC, the pain ratings were higher than in the CC with and without ointment. The nocebo response correlated with pain catastrophizing but not with pain anxiety or somatosensory amplification. A nocebo response to pressure pain was induced by observational learning but not by verbal suggestion. This finding highlights the importance of investigating the influence of observational learning on nocebo hyperalgesia. (PsycINFO Database Record (c) 2016 APA, all rights reserved)

Individuals with bulimia nervosa (BN) or binge-eating disorder (BED) experience more frequent and intense food cravings than individuals without binge eating. However, it is currently unclear whether they also show larger food cue-induced increases in craving (i.e., food cue reactivity) than those without binge eating, as suggested by conditioning theories of binge eating. A group of individuals with BN or BED (binge-eating group,  n  = 27) and a group of individuals with low trait food craving scores and without binge eating (control group,  n  = 19) reported their current food craving before and after a food cue exposure. Although food craving intensity significantly increased in both groups, this increase was significantly stronger in the binge-eating group than in the control group. This result is in line with conditioning models of binge eating that propose that food cues are conditioned stimuli that elicit a conditioned response (e.g., food craving) and that this association is stronger in individuals with binge eating. As food craving increased in individuals with low trait food craving scores as well—although to a lesser extent—previous null results might be explained by methodological considerations such as not screening control participants for trait food craving.

Strong implicit responses to food have evolved to avoid energy depletion but contribute to overeating in today's affluent environments. The Approach–Avoidance Task (AAT) supposedly assesses implicit biases in response to food stimuli: Participants push pictures on a monitor “away” or pull them "near" with a joystick that controls a corresponding image zoom. One version of the task couples movement direction with image content-independent features, for example, pulling blue-framed images and pushing green-framed images regardless of content (‘irrelevant feature version’). However, participants might selectively attend to this feature and ignore image content and, thus, such a task setup might underestimate existing biases. The present study tested this attention account by comparing two irrelevant feature versions of the task with either a more peripheral (image frame color: green vs. blue) or central (small circle vs. cross overlaid over the image content) image feature as response instruction to a ‘relevant feature version’, in which participants responded to the image content, thus making it impossible to ignore that content. Images of chocolate-containing foods and of objects were used, and several trait and state measures were acquired to validate the obtained biases. Results revealed a robust approach bias towards food only in the relevant feature condition. Interestingly, a positive correlation with state chocolate craving during the task was found when all three conditions were combined, indicative of criterion validity of all three versions. However, no correlations were found with trait chocolate craving. Results provide a strong case for the relevant feature version of the AAT for bias measurement. They also point to several methodological avenues for future research around selective attention in the irrelevant versions and task validity regarding trait vs. state variables.

A distorted body image and pronounced body dissatisfaction are hallmarks of anorexia nervosa (AN) that typically result in dietary restraint and compensatory behaviours. Cognitive biases such as negative interpretation bias are considered key maintaining factors of these maladaptive cognitions and behaviours. However, little attention has been paid to empirical tests whether negative interpretation bias exists in AN and to what degree it is associated with symptom severity. Participants in the present study were 40 women with AN and 40 healthy women with no history of an eating disorder. Body-related negative interpretation bias (i.e., a tendency to interpret ambiguous information about the own body in a negative way) was measured by a Scrambled Sentences Task. Patients with AN showed a stronger body-related negative interpretation bias than healthy controls. Within both groups, negative interpretation bias correlated strongly and positively with AN symptom severity and these effects were not moderated by levels of depressive symptoms. The findings support the idea that biased interpretation of body-related information is associated with the specific psychopathology of AN. Targeted, computerised interventions (e.g. interpretation bias modification) may help to alter these dysfunctional cognitive schemas that lie at the heart of AN.

Background: Heightened sensitivity towards reward and insensitivity towards disadvantageous consequences may constitute a driving factor underlying unrestricted food intake and consequent weight gain in people with overweight and obesity. Therefore, the present study applied a behavioral economics approach to investigate the potential contribution of poor reward-related decision making to unsuccessful long-term weight loss maintenance (i.e. weight cycling). Based on previous research, it was expected that successful long-term weight loss maintainers would show a better performance in a gambling task than their less successful counterparts. Methods: Reward-related decision making was assessed post hoc using the Game of Dice Task in a total of 33 overweight and obese women who had either (a) successfully maintained initial weight loss of at least 10% of their body weight over one year or (b) had regained weight until at least their initial body weight prior to weight reduction (i.e. showed weight cycling). Results: The groups did not differ in terms of age, current body weight, magnitude of initial weight reduction, educational level, and global intelligence level. As hypothesized, however, the group of successful long-term weight loss maintainers performed significantly better (i.e. showed less impulsive, more advantageous choices) in the Game of Dice Task than their less successful counterparts. Conclusions: The findings suggest that poor reward-related decision making is associated with weight cycling which is considered a key concern in weight loss treatments for overweight and obesity. Furthermore, the findings speak in favor of specific psychological interventions that are designed to bolster reward-related decision making. (PsycINFO Database Record (c) 2017 APA, all rights reserved)

Abstract Selecting appropriate stimuli is a major challenge of affective research. Although several standardized databases for affective pictures exist, none of them focus on discrete emotions such as disgust. Validated pictures inducing discrete emotions are still limited, and this presents a problem for researchers interested in studying different facets of disgust. In this paper, we introduce the DIsgust-RelaTed-Images (DIRTI) picture set. The set consists of 240 disgust-inducing pictures divided into six categories (food, animals, body products, injuries/infections, death, and hygiene). Additionally, we included 60 matched neutral pictures (10 per category). All pictures were rated by 200 participants on nine-point rating scales measuring disgust, fear, valence, and arousal. The present validation study covered a wide age range (18–75 years) with a balanced number of participants in each decade of life. For each picture, we provide separate ratings on the four scales for men and women. In addition to the original pictures, we also provide a luminance-matched version for experiments that require control of the physical properties of the pictures. The standardized \DIRTI\ picture set allows researchers to chose from a wide set of disgust-inducing pictures and may enhance researchers' ability to draw comparisons between studies on disgust. (Download \DIRTI\ picture set: http://dx.doi.org/10.5281/zenodo.167037).

In 1986 Pennebaker and Beall published their renowned study on the long-term beneficial health effects of disclosing traumatic events in 4 brief sequential writing sessions. Their results have been confirmed in various studies, but conflicting results have also been reported. The intent of our study was to replicate the experiments from Pennebaker and Beall (1986), Pennebaker et al. (1988), and Greenberg and Stone (1992) using a German student sample. Additionally, essay variables that point to the emotional processing of events (e.g., depth of self-exploration, number of negative/positive emotions, intensity of emotional expression) were examined as potential mechanisms of action. Trait measures of personality which could moderate the personal consequences of disclosure (alexithymia, self-concealment, worrying, social support) were also assessed. In a second study the experimental condition (disclosure) was varied by implementing 'coping' vs. 'helping' instructions as variations of the original condition. Under the coping condition participants were asked to elaborate on what they used to do, continue to do, or could do in the future to better cope with the event. Under the helping condition participants were asked to imagine themselves in the role of an adviser and elaborate on what they would recommend to persons also dealing with the trauma in order to better cope with the event. The expected beneficial effects of disclosure on long-term health (e.g., physician visits, physical symptoms, affectivity) could not be corroborated in either the first or the second study. None of the examined essay variables of emotional processing and only a single personality variable was able to explain significant variance in the health-related outcome variables influence. Nevertheless, substantial reductions in posttraumatic stress symptoms (e.g., intrusions, avoidance, arousal), were found in both experiments. These improvements were significantly related to essay variables of emotional expression and self-exploration and were particularly pronounced under the activation of a prosocial motivation (helping condition). Repeated, albeit brief, expressive writing about personally upsetting or traumatic events resulted in an immediate increase in negative mood but did not lead to long-term positive health consequences in a German student sample. It did, however, promote better processing of stressful or traumatic events, as evidenced by reductions in posttraumatic stress symptoms. The instruction to formulate recommendations for persons dealing with the same trauma seems more helpful than standard disclosure or focusing on one's own past, present, and future coping endeavours. Overall, expressive writing seems to be a successful method of improving trauma processing. Determining the appropriate setting (e.g., self-help vs. therapeutic context) for disclosure can be seen as an objective of future research. (PsycINFO Database Record (c) 2016 APA, all rights reserved)

In 1986 Pennebaker and Beall published their renowned study on the long-term beneficial health effects of disclosing traumatic events in 4 brief sequential writing sessions. The intent of our study was to replicate the experiments from Pennebaker and Beall (1986), Pennebaker et al. (1988), and Greenberg and Stone (1992) using a German student sample. Additionally, essay variables that point to the emotional processing of events were examined as potential mechanisms of action. Trait measures of personality which could moderate the personal consequences of disclosure were also assessed. In a second study the experimental condition (disclosure) was modified by implementing 'coping' vs. 'helping' instructions as variations of the original condition. Under the coping condition participants were asked to elaborate on what they used to do, continue to do, or could do in the future to better cope with the event. Under the helping condition participants were asked to take on the role of being an adviser and to elaborate on what they would recommend to persons dealing with the given trauma in order to better cope with the event. The expected beneficial effects of disclosure on long-term health could not be corroborated in either the first or the second study. Furthermore, none of the examined essay variables of emotional processing and only one of the personality variables was found to have a moderating influence on the long-term health variables. Nevertheless, substantial reductions in posttraumatic stress symptoms, were found in both experiments. These improvements were significantly related to the essay variables of emotional expression and self-exploration and were particularly pronounced under the activation of prosocial motivation (helping condition). Repeated, albeit brief, expressive writing about personally upsetting or traumatic events resulted in an immediate increase in negative mood but did not lead to long-term positive health consequences in a German student sample. It did, however, promote better processing of stressful or traumatic events, as evidenced by reductions in posttraumatic stress symptoms. The instruction to make recommendations for persons dealing with the same trauma appears to be more helpful than standard disclosure or the modified 'coping' instruction. Overall, expressive writing could be confirmed as a successful method of improving trauma processing. Determining the appropriate setting for disclosure can be seen as an objective of future research. (PsycINFO Database Record (c) 2016 APA, all rights reserved)

Fearful avoidance of physical activities is a major factor in low back pain (LBP) and disability. In 1993 Waddell et al. developed the Fear-Avoidance Beliefs Questionnaire (FABQ) focusing on patients' beliefs about how physical activity and work affect LBP. The focus of our study was to analyse and validate the German version of the FABQ. Three-hundred and two consecutive LBP outpatients participating on a functional restoration programme filled in the FABQ. Factor analysis yielded three factors which accounted for nearly 65\% of the total variance of the questionnaire. Whereas the factor 'physical activity' (8.9\% of the variance) remained the same as in the English version, the second factor of the original version split into two: one related to, 'work as cause of pain' (43.4\% of the variance) and the other to patients' assumptions of their probable return to work (11.8\% of the variance). Both work-related subscales showed a good internal consistency (α = 0.89, resp. α = 0.94), whereas the consistency of the subscale 3 'physical activity' was only modest (α = 0.64). Test-re-test reliability score was fair to good for the whole scale (r = 0.87; n = 30). Regression analysis demonstrated that fear-avoidance beliefs account for the highest proportion of variance (35\%) regarding disability in activities of daily living and work loss. Patients out of work demonstrated more fear-avoidance beliefs in comparison to those who were still working. It can be concluded that the German version of the FAQB is a reliable and valid instrument, but it shows a different factor structure from the original English version. The FABQ has been proven to identify patients with maladaptive beliefs which have to be focused on in proper treatment. (PsycINFO Database Record (c) 2016 APA, all rights reserved)

The present study investigated the pain-reducing effects of various pictures in a sample of 88 patients receiving inpatient treatment for chronic pain. We investigated whether the pain-attenuating effects of the pictures were mediated by picture valence, arousal, or change in subjective social support. The study was carried out over 4 consecutive days. Patients were presented with photographs of loved ones, strangers, landscapes, or optical illusions via digital albums and were asked to rate their pain intensity and their sensory and affective experience of pain immediately before and after viewing the pictures. They also evaluated the valence of the pictures and the extent to which they were arousing. Before and after participation in the study, patients provided information on their subjective social support. The valence attributed to the pictures varied; photographs of loved ones elicited the greatest pleasure. Pictures of varying emotional content and arousal value all reduced affective and sensory perceptions of pain. Viewing photographs of loved ones reduced pain intensity more than viewing other picture types. The association between picture type and decrease in pain intensity was mediated by picture valence. These findings suggest an easy to implement supplementary intervention that could be used in multidisciplinary pain treatment. PERSPECTIVE: To our knowledge, this is the first demonstration that pictures mitigate pain in chronic pain patients receiving treatment in a multidisciplinary pain center. The procedure could be used routinely to treat pain, particularly severe pain. (PsycINFO Database Record (c) 2016 APA, all rights reserved)

Studied the predictability of successful behavior therapy interventions (biofeedback and relaxation) in chronic headache cases. Using, among others, multiple-regression and stepwise-discriminant analysis, the authors tested a set of variables (personality traits, psychophysiological responses under stress and relaxation conditions, symptomatologies, demographies, and therapy-related subjective reports), in addition to headache intensity and duration and medication intake, as predictors of behavior therapy success in treating chronic headaches. A number of personality traits and some physiological responses showed some predictive value, but overall study results appear to be inclusive; even symptomatic and demographic variables do not significantly correlate with outcomes. (English abstract) (PsycINFO Database Record (c) 2016 APA, all rights reserved)

Describes the development and validation of a questionnaire designed to differentiate among the following headache syndromes: migraine, tension headache, combined headache, and ambiguous symptomatology. The questionnaire was developed in a study involving 302 chronic headache sufferers and tested with a group of 113 migraine sufferers. Data support the use of this instrument in group studies among chronic headache sufferers. (English abstract) (PsycINFO Database Record (c) 2016 APA, all rights reserved)