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F Simion

Publications and source records attributed to F Simion.

7 recordsLinked to original sources
PubMed1979

Evidence for a right hemisphere superiority and for a serial search strategy in a dot detection task.

In Experiment I the subjects manually signaled whether a solid dot was present or not in an array of empty dots presented either in the right or in the left visual field. The dots were either three or six and the target could appear in any of the possible locations. The results showed (a) a left visual field superiority; (b) a left hand superiority; (c) faster responses to three-dot than to six-dot displays, and (d) an effect of the location of the target in the display. Experiment II exactly replicated the previous experiment with the exception that the stimuli were centrally projected. The results showed: (a) a left hand superiority; (b) an effect of the number of dots in the display. These results can be interpreted to indicate: (a) a right hemisphere specialization in a simple feature detection task without any spatial component; (b) the compatibility of a right-hemisphere advantage with a serial search strategy.

Adult↗
PubMed1978

Different levels in processing simple geometrical figures.

An experiment has been conducted in order to extend to geometrical figures Posner's (1969) findings of various levels of processing for alphabetical material. Pairs of simple figures (triangles and trapezoids) were tachistoscopically presented to subjects asked to judge if they were "same" or "different". Subjects were instructed to respond "same" either if the two figures had the same shape or the same name, e.g., a scalene triangle paired with a right-angled one. The results support the theory of different levels of processing also for geometrical figures.

Adult↗
PubMedDate not supplied

[Influence of the delivery on neonatal competence].

It is a widely held view that the NBAS (Brazelton, 1973) can index differences in the level of the neurobehavioural organization of both pathological and normal newborns. The present study employed the NBAS to determine whether the type of delivery, i.e. cesarean or spontaneous vaginal, can influence the level of neurobehavioural organization in the first days of life. To this aim, two groups of healthy newborns, as assessed through obstetrical anamnesis and the Apgar index, were compared at 4, 24, 72 hours of postnatal life. Ten newborns were born by cesarean section and 10 were born by spontaneous vaginal delivery. The results did not show any neurobehavioural differences for the five clusters of the NBAS: Response decrement, Orientation, Motor, Range and Regulation of states. This outcome fails to support the hypothesis that the level of neurobehavioural organization in the first hours of postnatal life depends on the type of delivery. It must be considered, however, that the null results could be attributed to the way the NBAS is administered according to Brazelton's criteria of "best performance" and "flexibility of the examiner". In essence, these criteria require the NBAS to be administered several times in succession, by varying the order of clusters and the order of items within a cluster, until the "best performance" is obtained. Therefore, a second experiment was conducted, in which the criticisms and suggestions put forward by Prechtl (1982) were taken into account. Two groups of 10 newborns each, selected as before, were tested.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMedDate not supplied

[Modalities of adaptation to extrauterine environment of newborn infants during sleep].

Three groups of healthy full term neonates, differing in delivery modalities (elective caesarean section, labor of greater than or less than 7 hours) were investigated during sleep to evaluate postnatal adaptation. Adaptation modalities were assessed by NBAS, using the cluster of the decrements. It was found that neonatal responses change during sleep in relation to delivery modalities and to type of stimuli applied.

Adaptation, Physiological↗