Mood and belief-value correlation

This is an investigation of belief-value distortion as measured by the correlation between sets of beliefs and values for a given attitude object. Correlations were computed for each subject separately. Initial mood levels and mood changes subsequent to ratings of attitudes to nuclear power were investigated in the first two studies. In Study 1 mood changes were positively correlated with attitude. In Study 2, mood levels were positively correlated both with attitude, optimism, and tendency towards extreme belief-value correlations (belief-value distortion). In a third study, attitudes were studied both towards nuclear power and alcohol. There were no clear relations between the two fields of contents. Mood changes were small and inconsistent. However, tendency to act correlated with both optimism and belief-value distortion, also with the level of attitude kept constant. A model relating mood, optimism, belief-value distortion, and action is suggested.     

Factor analysis of dichotomized variables

An approach for multiple factor analysis of dichotomized variables is presented. It is based on the distribution of the first and second order joint probabilities of the binary scored items. The estimator is based on the generalized least squares principle. Standard errors and a test of the fit of the model is given.     

A simple decoder arrays to a for linking photocell microcomputer

Inputs from photocell arrays (such as those incorporated in mazes) to a microcomputer must be decoded. For up to 31 channels, this can be conveniently done by using cascaded 8-to-3 line priority encoders (74LS148) and five lines on a parallel data bus. The arrangement is expandable. It is currently used in an automatized Y-maze for vibrisso-tactile discrimination learning in mice.     

Use and interpretation of test scores from limited cognitive test batteries: How g + Gc can equal g

Single scores from limited and unbalanced test batteries of cognitive ability can be ambiguous to interpret theoretically. In this study, a limited verbally and knowledge‐loaded cognitive test battery, from applicants to the Swedish police academies (N = 1,344), was examined to provide foundations for the use and interpretation of test scores. Three measurement models were compared: one single factor model and two bifactor models, which decomposed the variance of the battery into orthogonal components. The models were evaluated by fit indices and omega coefficients, and then applied to the prediction of academic performance. The overall prediction of all models was similar, although specific abilities also were found to provide substantial predictive validity over and above general intelligence (g). The findings provide support for the use of single scores in applied settings (selection), but suggest that it may be more appropriate to interpret such scores as composites of substantive components, and not just as measures of g.     

Working memory and attention are still impaired after three years in patients with stress‐related exhaustion

Cognitive impairment is one of the most pronounced symptoms reported by patients with stress‐related mental health problems. Impairments related to executive function and to some extent speed and attention are therefore common in patients with stress‐related burnout/exhaustion. In this paper we present a follow‐up of cognitive performance in patients with stress‐related exhaustion several years after they initially sought medical care. Thirty patients and 27 healthy controls, mean age 49 years (SD 6.5) and 55 years (SD 6.7) respectively, were included, all of whom had undergone baseline measurements of neuropsychological functioning. The mean follow‐up time was three years. Half of the patients still reported mental health problems at follow‐up and over time no major changes in cognitive performance were noted. The patients still performed significantly poorer than controls with regard to cognitive functions, mainly related to speed, attention and memory function. Long‐lasting impairment of cognitive functions related to speed, attention and memory function noted in patients with stress‐related exhaustion should be acknowledged and taken into consideration during treatment and when discussing a return to work. Follow‐up periods longer than three years are needed to explore the persistence of the cognitive impairment.     

Silence and survival: Working with strategies of denial in families of traumatized pre-school children

Silence and denial about previous traumatic experiences are common features in families exposed to organized violence. Mutual protection between family members, and especially between parents and children, is seen as the fundament for the silencing of traumatic experiences. This strategy is suggested to have adaptive advantages in dangerous situations in general, where it serves the function of saving the child's internal representations of his/her parents as secure bases. If, however, the dangerous situation escalates and a psychic trauma cannot be avoided, the strategy of mutual silence concerning the event(s) becomes an obstacle for giving traumatized children parental support and professional treatment. It is argued that clinicians need to take seriously the strong reasons families have for upholding their strategy of denial, if they want to help traumatized families to a better functioning. A case presentation is made to illustrate how it is possible to use refugee children's re-enacting play as a source of information about past traumatic events in order to change destructive post-traumatic family dynamics and improve parental support to the child.     

Uncovering the structure of a memorist's superior "basic" memory capacity

After extensive laboratory testing of the famous memorist Rajan, Thompson, Cowan, and Frieman (1993) proposed that he was innately endowed with a superior memory capacity for digits and letters and thus violated the hypothesis that exceptional memory fully reflects acquired "skilled memory." We successfully replicated the empirical phenomena that led them to their conclusions. From additional analyses and new experiments, we found support for an alternative hypothesis, namely that Rajan's superior memory for digits was mediated by learned encoding techniques that he acquired during nearly a thousand hours of practice memorizing the mathematical constant pi. Our paper describes a general experimental approach for studying the structure of exceptional memory and how Rajan's unique structure is consistent with the general theoretical framework of long-term working memory (Ericsson and Kintsch, 1995).