Screening for obsessive and compulsive symptoms: validation of the Clark-Beck Obsessive-Compulsive Inventory

The 25-item Clark-Beck Obsessive-Compulsive Inventory (CBOCI) was developed to assess the frequency and severity of obsessive and compulsive symptoms. The measure uses a graded-response format to assess core symptom features of obsessive-compulsive disorder (OCD) based on Diagnostic and Statistical Manual of Mental Disorders (4th ed.; American Psychiatric Association, 1994) criteria and current cognitive-behavioral formulations. Revisions were made to the CBOCI on the basis of psychometric and item analyses of an initial pilot study of clinical and nonclinical participants. The construct validity of the revised CBOCI was supported in a subsequent validation study involving OCD, nonobsessional clinical, and nonclinical samples. A principal-factor analysis of the 25 items found 2 highly correlated factors of Obsessions and Compulsions. OCD patients scored significantly higher on the measure than nonobsessional anxious, depressed, and nonclinical samples. The questionnaire had strong convergent validity with other OCD symptom measures but more modest discriminant validity.     

Information entropy analysis of discrete aiming movements

Information entropy and mutual information were investigated in discrete movement aiming tasks over a wide range of spatial (20-160 mm) and temporal (250-1250 ms) constraints. Information entropy was calculated using two distinct analyses: (1) with no assumption on the nature of the data distribution; and (2) assuming the data have a normal distribution. The two analyses showed different results in the estimate of entropy that also changed as a function of task goals, indicating that the movement trajectory data were not from a normal distribution. It was also found that the information entropy of the discrete aiming movements was lower than the task defined indices of difficulty (ID) that were selected for the congruence with Fitts' law. Mutual information between time points of the trajectory was strongly influenced by the average movement velocity and the acceleration/deceleration segments of the movement. The entropy analysis revealed structure to the variability of the movement trajectory and outcome that has been masked by the traditional distributional analyses of discrete aiming movements.     

Strategies Used in the Treatment of Borderline Personality Disorder: A Survey of Practicing Psychologists

One hundred and twenty three practicing psychologists completed surveys regarding the therapeutic techniques they employ for patients with Borderline Personality Disorder (BPD). Participants identified their predominant orientation and rated the frequency with which they used a range of 27 specific strategies. Logistic regression analyses identified an expected relationship between specific techniques and the theoretical orientations to which they are most closely linked. These findings suggest a high level of concordance between self-described theoretical orientation and the specific treatment techniques utilized, but also that some theoretical orientations are comprised of smaller independent clusters of strategies. The implications of these findings are discussed.     

Obstacle avoidance in novel visual environments improved by variable practice training

Motor performance on simple tasks improves after training in variable practice. We asked if locomotor skill during an obstacle-avoidance task in a novel sensorimotor environment improved through training in variable practice on other complex tasks. 40 normal adults practiced gross motor skills while wearing either sham lenses, one of several visual distortion lens (constant practice), or three different visual distortion lenses (variable practice). Posttests on obstacle avoidance with novel lenses showed significantly better scores with variable practice and one of the constant groups vs sham lenses. Constant and variable practice groups did not differ. Thus, performance in a novel environment improves after training on similar type novelty, even when practice and test conditions differ. Constant practice was effective only if the subjects used the lens efficacious in training. Variable practice increases the likelihood of efficacious training when adaptive performance is required in a novel environment.     

Imagery and psychotic symptoms: a preliminary investigation

Recent cognitive accounts of psychotic symptoms have suggested that processes involved in the maintenance of emotional disorders may also be implicated in the maintenance of hallucinations and delusions, and particularly emphasise the appraisals of such symptoms as important. Imaginal appraisals have been identified in emotional disorders, and many studies have reported spontaneously occurring images in patients with anxiety disorders. Such images appear to be linked to affect, beliefs and memories. This study examined the occurrence of imagery, using a semi-structured interview, in 35 patients who were experiencing hallucinations and/or delusions and receiving cognitive therapy. The majority of patients (74.3%) reported images, and most of these were recurrent and associated with affect, beliefs and memories. Common themes included images about feared catastrophes associated with paranoia, traumatic memories, and images about the perceived source or content of voices. The theoretical and clinical implications of these findings are discussed and directions for further research considered.     

Creating Connection and Reducing Distress: the Effects of Functional Analytic Psychotherapy on Measures of Social Connection across Levels of Analysis

The Psychological Record - Research on functional analytic psychotherapy's (FAP) proposed process of change has focused on the turn-by-turn coding of FAP. In these studies, FAP-consistent...     

Ambient sensory conditions: modification of receptive speech deficits in left-side stroke patients using bright light

Previous research has demonstrated the potential for the use of ambient sensory conditions to improve cognitive functioning. Both light and sound have been shown to improve task performance in various populations including children, younger adults, and elderly participants; however, these cognitive gains may possibly be offset by detrimental cardiovascular reactivity in elderly persons. We now have some evidence for ambient sensory conditions affecting cognitive function following left- or right-side cerebrovascular accidents.