DISTINGUISHING BETWEEN EXTINCTION AND PUNISHMENT EFFECTS OF RESPONSE BLOCKING: A REPLICATION

Lerman and Iwata (1996) described a method for distinguishing between sensory extinction and punishment effects of response blocking on self-injurious behavior maintained independent of social contingencies. Results of their study suggested that blocking decreased the self-injurious hand mouthing of their participant via punishment. The current replication of these procedures with the self-injurious eye poking of a woman with developmental disabilities produced patterns of responding indicating that, for this participant, blocking functioned as an extinction procedure.     

Superstitious Rule Generation is Affected by Probability and Type of Outcome

The Psychological Record - One hundred and fifty participants played a computer task in which pOints were either gained (reinforcement) or lost (punishment) randomly on 75%, 50%, or 25% of trials....     

Perceptions of quality of journals related to health education

Faculty and chairpersons (N = 102) at 34 programs granting doctoral degrees in health education were asked to rate the quality of professional journals related to health education. The American Journal of Public Health was the highest rated journal. Health Education Quarterly was second, and Health Education Research, the only other health education journal, was rated in the top 10 (rated 7). The journals from the epidemiology area rated higher than journals from other areas. The respondents were least familiar with journals on the environment, safety, and death education.     

Rule-based learning impairment in rats with lesions to the dorsal striatum.

The present study examined the effects of lesions to the dorsal striatum (DS) in Sprague-Dawley rats, when tested on the acquisition and successive shifts in the position of a goal arm in an eight-arm radial maze. In the procedure we used, rats had to retrieve the location of one baited arm among the eight arms of the maze after it had just been presented as a sample during a forced trial. After attainment of a fixed learning criterion, rats were submitted to five successive shifts in the goal location. Results showed that DS rats were able to learn the position of the goal arm during the acquisition phase as efficiently as sham-operated rats. In contrast, when the position of the goal arm was shifted, although DS rats were able to learn its new position, they made significantly more errors and required more sessions to reach criterion than sham-operated rats. These results suggested that both groups did not solve the task using the same behavioral strategy. The analysis of responses made suggested that sham-operated rats solved the task using the pairing rule between the forced and the free run (matching-to-sample rule), while DS rats solved the task using only visuo-spatial processing. These data therefore suggest that the dorsal striatum plays an important role in rule-learning ability.     

Psychophysiological Identification of Depression Subtypes in Older Adults: Problematic Diagnostic Heterogeneity in the DSM-III-R and DSM-IV

The DSM-IV does not subclassify patients with depression on the basis of anxiety level. Hence a significant confound may exist in all outcome studies that employ DSM definitions of depression. To establish that objectively identifiable anxious and nonanxious subtypes of depression do indeed exist, a psychophysiological assessment battery was used with 114 treatment-seeking older adults. Dichotomous criterion categorization as either Nonanxious Depressed or Anxious Depressed was based on (a) DSM-III-R/DSM-IV diagnosis, and (b) standardized questionnaires of psychopathology. Multivariate analyses revealed no differences between groups when DSM criteria were used to classify participants. However, identical analyses using phenomenological diagnostic criteria indicated that anxious and nonanxious depressed participants differed in their psychophysiological response to negative imagery. Although anxious and nonanxious depressed participants evince different psychophysiological response patterns, these differences unfortunately are obscured by the DSM. Consequently, a phenomenological classification system may be more appropriate with affective disorders.     

Visual acuity improvement following fading and feedback training—I. Comparison of myopic and emmetropic volunteers

18 myopes and 18 emmetropes were randomly assigned in pairs to either Fading and Feedback training or a no-treatment control condition. The emmetropes were fitted with plus lenses equivalent to the spherical correction of the paired myope to simulate myopic visual acuity. Extensive visual acuity measures were obtained pre- and post-training. Data analyses indicated significant increases in recognition visual acuity for trained subjects, compared to no-treatment controls. The myopia/emmetropia variable did not interact with training even though there were noticably greater increases in visual acuity for trained myopes compared to the other conditions. Resolution visual acuity did not change as a function of training. These data are discussed in terms of their implications for better understanding the mechanisms responsible for visual acuity increases following behavioural training.     

Hope and Coping with Cancer by College Women

The relations of dispositional hope to various self-reported cancer-related coping activities were examined in 115 college women. Dispositionally high- as compared to low-hope women were more knowledgeable about cancer, and this relationship remained when the shared variances due to previous academic achievement, experience with cancer among family or friends, and positive and negative affectivity were removed. Additionally, high- as compared to low-hope women reported more hope-related coping responses in four separate imagined phases of cancer (prevention/risk, detection, temporal course, and impact), and these relationships remained when shared variances related to previous academic achievement, knowledge about cancer, experience with cancer, and negative affectivity were removed. Hope is discussed as means of maintaining a "fighting spirit" for coping with cancer.     

Program Constructions that are Safe for Bisimulation

It has been known since the seventies that the formulas of modal logic are invariant for bisimulations between possible worlds models — while conversely, all bisimulation-invariant first-order formulas are modally definable. In this paper, we extend this semantic style of analysis from modal formulas to dynamic program operations. We show that the usual regular operations are safe for bisimulation, in the sense that the transition relations of their values respect any given bisimulation for their arguments. Our main result is a complete syntactic characterization of all first-order definable program operations that are safe for bisimulation. This is a semantic functional completeness result for programming, which may be contrasted with the more usual analysis in terms of computational power. The 'Safety Theorem' can be modulated in several ways. We conclude with a list of variants, extensions, and further developments.     

Socialism in One Country: A Reassessment

Until 1917 Lenin and Trotsky believed that an isolated revolutionary Russia would have no chance of survival. However, from 1917 to 1923 Lenin's standpoint on this matter underwent a complete reversal. First he came to the conclusion that socialism could be built in an isolated Russia, although it would remain incomplete in the absence of the world revolution. By 1923 he was abandoning that latter qualification too. The standpoint of Stalin and Bukharin in the debate on socialism in one country of 1925–26 was more orthodox-Leninist than the position taken by Trotsky, who had at first also embraced the notion of incomplete socialism, but subsequently returned to the old concept, abandoned by Lenin, that the restoration of capitalism was inevitable in the absence of the world revolution.