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.     

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.     

Heroin addicts reporting previous heroin overdoses also report suicide attempts

Nonfatal heroin overdoses and suicide attempts are both common among heroin addicts, but there is limited knowledge about the association between them. The sample in the present study consisted of 149 regular heroin users in Malmö, Sweden. Out of these 98 had taken an unintentional heroin overdose at some time and 51 had made at least one attempt to commit suicide (but not using heroin). Suicide attempts were significantly more common among those who had taken unintentional overdoses as compared with those who had never taken any overdose (p < 0.01). The more overdoses, the greater the risk of suicide attempt.     

The testing effect as a function of explicit testing instructions and judgments of learning

During study, people monitor their learning; the output of this monitoring is captured in so-called judgments of learning (JOLs). JOLs predict later recall better if they are made after a slight delay, instead of immediately after study (the delayed JOL effect). According to the self-fulfilling prophecy (SFP) hypothesis delayed JOLs are based on covert retrieval attempts from long-term memory, and successful retrieval attempts in themselves enhance learning (the testing effect). We compared memory for 40 Swahili-Swedish paired associates after a week as a function of three different learning conditions, namely study plus (i) explicitly instructed self-testing, (ii) delayed JOLs, or (iii) less self-testing. We showed that repeated delayed JOLs lead to a memory improvement that does not differ significantly from a comparable condition where the participants are explicitly testing memory, and both the latter groups performed reliably better than a group that self-tested less. The results suggest that delayed JOLs improve long-term retention as efficiently as explicit memory testing and lend support to the SFP hypothesis.     

Presentation-order effects for aesthetic stimulus preference

For preference comparisons of paired successive musical excerpts, Koh (American Journal of Psychology, 80, 171?C185, 1967) found time-order effects (TOEs) that correlated negatively with stimulus valence??the first (vs. the second) of two unpleasant (vs. two pleasant) excerpts tended to be preferred. We present three experiments designed to investigate whether valence-level-dependent order effects for aesthetic preference (a) can be accounted for using Hellstr?m??s (e.g., Journal of Experimental Psychology: Human Perception and Performance, 5, 460?C477, 1979) sensation-weighting (SW) model, (b) can be generalized to successive and to simultaneous visual stimuli, and (c) vary, in accordance with the stimulus weighting, with interstimulus interval (ISI; for successive stimuli) or stimulus duration (for simultaneous stimuli). Participants compared paired successive jingles (Exp. 1), successive color patterns (Exp. 2), and simultaneous color patterns (Exp. 3), selecting the preferred stimulus. The results were well described by the SW model, which provided a better fit than did two extended versions of the Bradley?CTerry?CLuce model. Experiments 1 and 2 revealed higher weights for the second stimulus than for the first, and negatively valence-level-dependent TOEs. In Experiment 3, there was no laterality effect on the stimulus weighting and no valence-level-dependent space-order effects (SOEs). In terms of the SW model, the valence-level-dependent TOEs can be explained as a consequence of differential stimulus weighting in combination with stimulus valence varying from low to high, and the absence of valence-level-dependent SOEs as a consequence of the absence of differential weighting. For successive stimuli, there were no important effects of ISI on weightings and TOEs, and, for simultaneous stimuli, duration had only a small effect on the weighting.     

If you have a choice,you have trouble: Stimulus valence modulates presentation‐order effects in preference judgment

It is well known that the presentation order of choice options often affects decision outcomes to a significant degree. However, despite the significance and wide occurrence of the effects, they are ignored in most preference models. Furthermore, psychophysical findings of stimulus‐magnitude dependent presentation‐order effects have not been acknowledged previously in the cognitive literature on preference judgments. Thus, the potential moderating effect of the level of stimulus magnitude (here, valence) on the direction and size of order effects in preference judgment has not been investigated previously. In two experiments, participants (117 and 204, respectively) rated their preference for pairs of everyday‐type objects and phenomena (e.g., apple–pear, headache–stomachache). Stimuli were spaced horizontally, and each participant received them in one of two opposite within‐pair presentation orders. Participants also rated the stimuli's valence on a scale from very bad to very good. The results showed a positive correlation between the rated valence and the tendency to prefer the first‐mentioned (left) stimulus; that is, the effect was greatest, and opposite, for choices between the most attractive and the most unattractive options, respectively. In terms of Hellström's ( 1979 ) sensation‐weighting model, the positive correlation is caused by a higher weight (i.e., impact on the preference judgment) for the left stimulus than for the right, which is possibly due to the left stimulus being compared to the right. The results suggest that researchers may have failed previously to find important moderators of presentation‐order effects in preference judgment due to the failure to use sufficiently attractive or unattractive stimuli. Copyright © 2010 John Wiley & Sons, Ltd.     

Psychological stress tasks in the prediction of blood pressure level and need for antihypertensive medication: 9-12 years of follow-up.

Increased blood pressure (BP) reactivity to subtypes of psychological stimuli may differentially predict the development of future BP elevation or hypertension. The authors present the 9-12-year follow-up results of 82 (86%) of 95 male participants with different BP levels. They were healthy, untreated, and age-matched volunteers from a routine health checkup carried out on all 35-, 40-, and 45-year-olds from a medium-sized city. Intra-arterial systolic blood pressure (SBP) during the psychological tasks improved the prediction of future casual SBP and noninvasive 24-hr ambulatory SBP compared with predictions from casual diagnostic measurements. Diastolic blood pressure (DBP) was very useful when added to casual DBP in predicting the need for antihypertensive medication. Reactivity to active tasks especially predicts the need for antihypertensive medication.     

Long-Term Outpatient Treatment in Alcoholics with Previous Suicidal Behavior

The importance of previous suicidal behavior for the treatment of alcoholics was analyzed in a long-term outpatient treatment study. In a series of 72 patients, 21 patients, (29%), 17 men and 4 women, had previously made at least one suicide attempt or had seriously threatened to kill themselves (3 cases). In comparison with the other alcoholics, those with previous suicidal behavior had a similar attrition rate, they were not more troublesome in treatment, and they had the same rate of favorable outcome during the third year after start of treatment. They differed from the other alcoholics in having a more severe abuse and a less favorable outcome during the initial part of the treatment. In conclusion, our results support the possibility of a long-term outpatient treatment strategy in alcoholics with previous suicide attempts.