INDIVIDUAL PERFORMANCES IN A SINGLE-CUE PROBABILITY LEARNING TASK

B jörkman , M. Individual performances in a single-cue probability learning task. Scand. J. Psychol . 1969, 10 , 113–123. —Inference behavior was studied in a 2 times 2 cue-criterion task. Fifty subjects were distributed on five conditions varying in cue validity and base rate. They were studied individually with respect to four cognitive strategies: matching, maximizing, double matching and differential maximizing. The utilization coefficients of the average subject had a tendency to 'overshoot' when the cue validity was high and to 'undershoot' when the validity was low. Double matching and differential maximizing were the most common strategies. Cognitive activity is interpreted as a compromise between various type performances.     

Pavlovian extinction,phobias, and the limits of the cognitive paradigm

The slow or total lack of decrease in some autonomic responses during extinction in aversive conditioning and concomitant verbalizations of fear have remained a problem for learning theories and psychophysiology. Removal of the aversive stimulus should result in a rapid decrement in responding, as it does in cognitive and somatic systems. In laboratory analogues of phobia and clinical neurosis, however, such decreases do not occur in some autonomic responses and reported fear. In this article three areas of research are presented in which dissociations occur between cognitive and autonomie responses: 1) relational learning, 2) phobia, and 3) incubation. The data indicate that there are some important distinctions to be made concerning the properties of different psychological and physiological systems. These distinctions pertain to the differences between cognitive and noncognitive systems, between the two branches of the ANS, and between acquisition and extinction processes. These distinctions lead to a number of hypotheses concerning dissociations between response systems and have important implications for the understanding and treatment of neurosis.     

Timing in the performance of Erik Satie's ‘Vexations’

In traditional studies of single cue probability learning the subject's errors and the covariation he/she establishes between the judgments and the cue (cue dependency) are confounded. Learning results in increased cue dependency which is necessarily accompanied by decreasing errors. This paper presents a method for disentangling errors from cue dependency. This is done by (1) making the criterion contingent upon the judgments instead of the cue, and (2) giving standard instructions, implying that the cue is informative about the criterion. In this way errors are controlled independently of any covariation that the subject may create between the cue and the judgments, and indirectly between the cue and the criterion (task regularity). The paper examines whether subjects aim at small errors or task-regularity when the task does not allow them to do both. It was found that error reduction does occur only when task-regularity can be maintained. Conclusion: task regularity, and thus cue-dependency, has priority to error reduction under the standard conditions used in single cue probability learning experiments. The study may be viewed as an example of conditions under which a cue illusion (false beliefs in the validity of a cue) arises.     

RELATIONS BETWEEN INTRA-MODAL AND CROSS-MODAL MATCHING

Accuracy in matching was investigated cross-modally (touch and vision) and intra-modally. The stimuli were surfaces of sand-paper. Two experiments showed (a) that matched stimuli are linearly related to the standard stimuli for the two intra-modal conditions, whereas non-linear relations (power-functions) were obtained in the two cross-modal conditions (touch-vision and vision-touch), (b) that the variance of matched stimuli is approximately three times as large when matching is performed cross-modally as compared to intra-modal matching. Data were analyzed according to a model which suggests that the correlation between discriminal dispersions belonging to the same modality is higher than the correlation between discriminal dispersions arising from two modalities.     

Protecting research integrity

It is not contoversial to state that acts of fraud do not belong in the academic world. What is debated is the best way to minimise the risk of fraudulent behaviour. Broadly speaking there are two different approaches to this problem. They differ with regard to whether the main focus is on internal or external control. In this article I argue that the main emphasis should be on internal structures in order to achieve the desired end. Only when the internal structures are in place is it meaningful to adopt external, supportive means to the same end. Invitation to the academic project as such, education and training in research ethics and good research practice, the implementation of good documentation procedures and the implementation of a procedure for investigation of suspicions of fraud which is characterised by efficiency, impartiality and competence are the four primary ingredients in the cure. The first three are suggested to build up the necessary foundation before a structure of investigation procedures are established. An earlier version of this paper was presented at a symposium, Scientific Misconduct: An International Perspective, organised by The Medical University of Warsaw, 16 November, 1998.     

Three Rs of Interpersonal Consumer Guilt: Relationship,Reciprocity, Reparation

This article explores the role of consumer guilt in a retail context. The results of a field study indicate that a consumer's lack of purchase can lead to a guilt response when social connectedness with a salesperson exists and the consumer perceives he or she has control over the purchase decision. A subsequent laboratory study established that when consumers experience guilt, they intend to pursue reparative actions during future purchase interactions with the salesperson to reciprocate the initial connection they established. This reparation is directed specifically toward the salesperson and not the firm.     

Linking vitamin D status,executive functioning and self‐perceived mental health in adolescents through multivariate analysis: A randomized double‐blind placebo control trial

The aim of the present randomized double‐blind placebo control trial was to investigate if vitamin D supplementation had an effect on vitamin D status, executive functioning and self‐perceived mental health in a group of Norwegian adolescents during winter time. Fifty adolescents were randomly assigned into an intervention group (vitamin D pearls) or a control group (placebo pearls). Before (pre‐test in December/January) and after (post‐test in April/May) the intervention period the participants were exposed to a test procedure, consisting of blood draw, completion of cognitive tests (Tower of Hanoi and Tower of London), and the Youth Self‐report version of the Child Behavior Checklist. Multivariate data analysis showed that participants with low vitamin D status scored worse on the Tower of London tests and the more difficult sub‐tasks on the Tower of Hanoi tests. They also had a tendency to report higher frequency of externalizing behavior problems and attention deficit. At pre‐test, the overall mean vitamin D status measured as 25‐hydroxy vitamin D was 42 nmol/L, defining deficiency (Intervention group = 44 nmol/L, Control group = 39 nmol/L). However, vitamin D supplementation caused a significant increase in vitamin D status resulting in a sufficient level in the Intervention group at post‐test (mean 62 nmol/L). The results also revealed that the intervention group improved their performance on the most demanding sub‐tasks on the ToH. Overall, the study indicates that vitamin D status in adolescents may be important for both executive functioning and mental health.     

Group acceptance and commitment therapy (ACT) for bipolar disorder and co-existing anxiety – an open pilot study

Previous studies have supported acceptance and commitment therapy (ACT) for reducing impairment related to various chronic conditions. ACT may possibly be beneficial for bipolar disorder (BD) with co-existing anxiety, which is associated with a poorer treatment outcome. Efforts are needed to identify suitable psychological interventions for BD and co-existing anxiety. In this open clinical trial, we included 26 patients with BD type 1 or 2 at an outpatient psychiatric unit specializing in affective disorders. The intervention consisted of a 12-session manualized group treatment that included psychoeducation, mindfulness, engaging in values-based behaviour, cognitive defusion, acceptance and relapse prevention modules. Participants completed four self-report questionnaires covering anxiety symptoms (Beck Anxiety Inventory - BAI), depressive symptoms (Beck Depression Inventory - BDI-II), quality of life (Quality of Life Inventory - QOLI) and psychological flexibility (Acceptance and Action Questionnaire - AAQ-2) before, during and after the treatment. At post-treatment, the participants reported significant improvements in all outcome measures, with large effects (Cohen’s d between 0.73 and 1.98). The mean reduction in anxiety symptoms was 45%. At post-treatment, 96% of the patients were classified as responders on at least one of the outcome measures. A limitation is that the trial is uncontrolled. The results suggest that ACT has the potential to be an effective treatment for BD patients with co-existing anxiety. Further randomized studies are warranted.