Anxious personality and functional efficiency of the insular-opercular network: A graph-analytic approach to resting-state fMRI

The brain is an intricate network, not only structurally but also functionally. On the functional level, connectivity in the brain is organized in separable yet interacting networks that support information processing by maintaining a ready state, even in the absence of external stimulation. It has been hypothesized that an insular-opercular network underlies the processing of emotionally salient information and that individual differences in functional connectivity within this network correspond to individual differences in trait anxiety. Here, we tested this relationship by applying graph analysis to multiple regions of interests delineating the insular-opercular network to estimate the characteristic path length that quantifies the overall information exchange efficiency within a given network. We found that people scoring high on the anxiety-related temperament-dimension harm avoidance had decreased insular-opercular network efficiency in the resting state, as indicated by a higher characteristic path length. Furthermore, people scoring high on harm avoidance showed generally reduced functional connectivity between brain regions; the relationship between harm avoidance and insular-opercular network efficiency remained significant when controlling for mean connectivity within this network. No such results were found for other resting-state networks. The results provide insights into how personality is organized in the human brain and point toward clinically relevant endophenotypes for affective and mood disorders.     

Ecology and its Spiritual Significance: a Christian Reading

Journal of Indian Council of Philosophical Research - The present paper is based on the contention that there are two conceptions of the understanding of nature, nature as an object and nature as...     

The Construction of Issues: Pleading Theory and Practice, Relevance in Pragmatics, and the Confrontation Stage in the Pragma-Dialectical Theory of Argumentation

Legal theory and practice, particularly on the exchange of pleadings, are referred to as a means of examining current thinking in pragmatics on relevance. The rules of pleadings suggest that the concept of relevance as used in pragmatics is emptied of any meaning and that theories of argumentation have not sufficiently taken into account the preliminary construction which issues to be argued about require.     

Establishing generalized verb-noun instruction-following skills in retarded children

A transfer of stimulus control procedure was used to establish generalized verb-noun instruction-following skills in two severely retarded boys. Each of 12 verbs was trained, in a multiple baseline order, to criterion with each of 12 nouns in the form of verb-noun verbal instructions. Throughout training, reinforced probes were conducted on both trained and untrained verb-noun combinations. As training progressed, both subjects began to respond correctly to untrained verb-noun instructions. Eventually, a verb needed to be trained in combination with only one noun before generalization occurred to the as-yet-untrained 11 verb-noun instructions involving that verb.     

THE EFFECTS OF DIFFERENT REINFORCEMENT CONDITIONS ON THE TEST PERFORMANCE OF MULTIHANDICAPPED DEAF CHILDREN1

The present study explored the effects of different reinforcement conditions on the number of correct responses on the Raven Progressive Matrices. Four groups of 11- to 18-year-old multihandicapped deaf children matched on the basis of mean age and pretest scores were used. The groups were randomly assigned to any of four posttest conditions: end-of-session reinforcement, noncontingent reinforcement, delayed reinforcement, and immediate reinforcement. The mean posttest score of subjects tested under the immediate-reinforcement condition was significantly higher than that of any other group. No significant differences were observed between the mean posttest scores of the three other groups. The practical implications of using reinforcement procedures for testing purposes are discussed.     

TRANSFER OF STIMULUS CONTROL FROM MOTOR TO VERBAL STIMULI1

A transfer of stimulus control procedure was used to teach three profoundly retarded adolescents a series of specific responses to specific verbal instructions. After imitative control of a behavior was established, a verbal instruction was presented immediately before the behavior was modelled. Each correct response was followed on the next trial by inserting a delay between the verbal instruction and the modelling of the behavior. The delays increased from trial to trial. Transfer of stimulus control was indicated when a subject responded correctly on five consecutive trials before the behavior was modelled. All three subjects responded correctly to each verbal instruction after that item was trained in a multiple-baseline order. Generalization did not occur to items that had not been trained. Probe data revealed that some variations of the verbal instructions controlled responses after training was completed.     

The Muslim community and English law

This article addresses what are perceived as being the main areas of English law likely to present Muslims in Britain with problems or difficulties. Some English legal provisions relating to the family, education and religious freedom are inconsistent with Islamic beliefs and practices. While English law has to be obeyed by all those living in England, there are plenty of opportunities for Muslims to exploit its liberal principles and practical flexibility to suit their own needs. Furthermore, English law can be reformed to make it more consonant with the values and traditions of minority faiths, as the Sikhs have recently demonstrated. So far, Muslim pressure groups have failed to achieve similar reforms and some possible explanations for this are given. The future emphasis of the English legal system should lie in promoting cultural and religious pluralism, within a set of shared core values, and various concrete suggestions for change are offered.

This article is based on a paper given at Cumberland Lodge, Windsor on 29 November 1991 to a conference on ‘Islam: The British Experience’ organized by the St. Catherine's Foundation.