Hostilidad,patrón de conducta tipo A y reactividad cardíaca

Resumen

La presente investigación tuvo como objetivo estudiar el efecto de la hostilidad autoinformada en la reactividad cardíaca de sujetos Tipo A/B. Los sujetos fueron 40 estudiantes varones repartidos en cuatro grupos: (1) Tipo A con alta Hostilidad, (2) Tipo A con baja Hostilidad, (3) Tipo B con alta Hostilidad y (4) Tipo B con baja Hostilidad. Todos ellos pasaron por tres pruebas de reactividad psicofisiológica: El Test de la Respuesta Cardíaca de Defensa ante estimulación auditiva intensa, una Tarea de Aritmética Mental y una Tarea de Juego de Vídeo Competitivo. La variable dependiente registrada fue la tasa cardíaca. Los resultados indican que en las tres pruebas no se observan diferencias en la reactividad de la tasa cardíaca entre sujetos Tipo A y B con alta Hostilidad autoinformada. Sin embargo, sí se observan diferencias entre sujetos Tipo A y B con baja Hostilidad autoinformada, siendo los sujetos Tipo A los que muestran mayores incrementos en tasa cardíaca durante la Respuesta Cardíaca de Defensa y el Juego de Vídeo Competitivo. En la Tarea de Aritmética Mental se observa esta tendencia, aunque no llegan a ser diferencias significativa s. Estos resultados sugieren que la supresión o negación de la hostilidad en sujetos Tipo A está asociada con un incremento en la reactividad cardiovascular.     

exploring drug users' illness representations of hiv,hepatitis b and hepatitis c using repertory grids

Abstract

Hepatitis B and C viruses are more prevalent among injecting drug users than HIV. This study explored drug users' illness representations of hepatitis B and C using repertory grid methodology. Initially, nine drug users were presented with six elements including hepatitis B and C, and HIV. Constructs were elicited via the sequential form variation of the method of triads. Elements were rated on elicited constructs using a five-point scale, and analyzed using “Flexigrid”. In a second quantitative research stage, 52 drug users were presented with six elements and supplied constructs. Results of the first stage indicated participants were able to generate constructs relating to Leventhal et al.'s (1980) features of illness representations. Most constructs, however, were causal in nature. Participants perceived hepatitis B, C and HIV similarly along the causal component. This similarity on the causal component was largely replicated in the second research stage. Participants, however, distinguished HIV from hepatitis B and C along serious, cure and timeline features. Participants did not distinguish hepatitis B from hepatitis C. The implications of these results for health promotion are discussed.     

A case of subcortical dementia due to sarcoidosis of the hypothalamus and fornices

A patient with sarcoidosis involving predominantly the hypothalamus and fornices was evaluated for dementia. He showed a relative sparing of fund of knowledge and orientation. Memory skills, particularly short-term memory, were severely impaired. Behavioral changes included apathy and a lack of spontaneity. Insight was relatively preserved. The pattern of his deficits showed some similarities to the pattern reported in patients with Huntington's disease and was different from that described in Alzheimer's disease. The dementia caused by subcortical pathology may differ in important respects from that caused by diffuse cortical dysfunction.     

Psychometric and Piagetian intelligences: Toward resolution of controversy

Whether “psychometric” and “Piagetian” kinds of intelligence, as measured by instruments designed to measure these constructs, are the same or different is regarded as a question of whether they have the same or different courses of development with age. While factor analysis may not be fully adequate for investigation of this question, use of this technique with variables reflecting chronological age variation must involve elimination of the age effect in order to assess relations among the constructs measured. Humphreys and Parsons (1979) were justified in partialing out age in their reanalysis of a study by Stephens, McLaughlin, Miller, and Glass (1972), to show that the two constructs are highly correlated and possibly identical in the sample studied. Reanalyses of studies by DeVries and Kohlberg (1977) and by DeVries (1974) yield somewhat conflicting results on the identity between psychometric and Piagetian intelligences. The former study does not yield a convincing separation between them, whereas the latter suggests that they can be distinguished, though substantially correlated and both loaded with a general factor. Problems in further investigating the issue are discussed.     

Hemispheric differences in the voluntary inhibition of movement

Twenty normal, twenty left-, and fifteen right-brain injured subjects, all right-handed, were assigned a sequence of voluntary inhibition of 23 movements. The inhibition lapse was recorded. Statistical analyses indicated a high performance in the normal and a deficient performance in left-brain injured subjects, no influence of the neurological symptoms on groups' achievement, a handicap in the subjects affected by a frontal lesion in the right brain, a hierarchical clustering of items varying according to the groups, and an organ-group interaction.     

A clinical trial of continuous, intermittent and overlearning ‘bell and pad’ treatments for nocturnal enuresis

Sixty-one enuretic children were allocated sequentially to ‘standard’, ‘intermittent’ or ‘overlearning’ bell and pad treatment. The results suggest that the ‘overlearning’ modification of standard treatment was successful in bringing about a reduction in the relapse rate. The present status and implications of research into nocturnal enuresis were discussed in the light of the results of the investigation.     

Child judgments of sentences varying in grammatical complexity

This study is another contribution to the development of a satisfactory child version of the linguistic task of judging grammaticality. With a nondifferentially reinforced forced-choice procedure, it was found that responses of 24 5- and 24 7-yr-old children did vary as a function of the grammatical complexity of stimulus sentences. The children judged sentence stimuli of two types (negatives and wh-word questions) each having three levels of grammatical complexity (two primitive and one well-formed). After each stimulus presentation, the subject pointed to the adult or the child in a photograph, depending on who was judged to have produced that utterance. Performance of the two age groups did not differ for the question stimuli, for which subjects pointed to the adult more frequently as the grammatical complexity of wh-word questions increased. In response to the negative sentences, the older group attributed more well-formed stimuli to the adult than primitive ones. While the younger group pointed to the adult more frequently for well-formed negatives than for the middle level negatives, they made more adult responses than expected to the least complex negatives. It was concluded that, with this procedure, 5- and 7-yr-olds demonstrate ability to distinguish grammatically well-formed from primitive sentences. Procedural improvements for future research may allow children this age and younger to demonstrate more adult-like discrimination between a variety of primitive and well-formed sentences.     

Infantile stimulation and its effects on frustration- and fear-motivated behavior in rats

Infant rats that were either removed from the nest each day (handled) or left undisturbed (nonhandled) were, in adulthood, given 72 food-reinforced runway acquisition trials followed by 24 trials of extinction training with or without shock. Handled and nonhandled control animals were given runway training without food reinforcement. Reinforced rats ran faster than nonreinforced rats, and handled rats ran faster than nonhandled rats during the initial trials of runway acquisition irrespective of the reinforcement condition. Nonhadled rats stopped running sooner than handled rats when shock was introduced in the goalbox, but differences between handled and nonhandled rats given extinction training without shock were small. Results of a second experiment showed no differences between handled and non-handled rats in the magnitude of the depression effect after an incentive shift. It was concluded that infantile handling had little effect on frustration-motivated behavior, but did affect fear-motivated behavior.