Principle explanation and strategic schema abstraction in problem solving.

This study was undertaken to examine the effects of strategic schema-acquisition tasks (problem comparison or problem construction) and the method of principle explanation (abstract or embedded principle method) on schema acquisition. Ninety-eight subjects studied a set of problems in probability, presented according to either method of principle explanation. Half the subjects in each principle-explanation group were then asked to compare analogous problems, and the rest constructed new analogous problems. To determine whether subjects generalized problem schemas, they were given new analogous problems to solve. The results showed that when the abstract principle method was used, schema acquisition was better in problem comparison; but with the embedded principle method, schema acquisition was better in problem construction. Results were discussed in relation to the importance of some fit between the presentation of problem information and the processes that will draw from or build on this information in tasks designed to allow novice problem solvers to acquire advanced problem representations.

Asymmetric activation of number codes in bilinguals: further evidence for the encoding complex model of number processing.

In two experiments, Filipino-English bilinguals were asked to verify simple addition equations that were presented either in digit, verbal-Filipino, or verbal-English formats and that included different types of sum probes. The main results show (1) faster and more accurate processing of digit and English items than of Filipino items, (2) stronger associative interference by type of probe with the digit and English items compared with the Filipino items, and (3) priming of responses from English to digit codes, and from Filipino to digit codes, but not vice versa. The results were explained by using an elaborated version of Campbell's (1994) encoding complex model with additional assumptions to address the experience of bilinguals. The additional assumptions relate to the preference among the bilingual's two verbal formats, the different strengths of activation pathways within each format, and the asymmetric activation across formats.

Validity of the Learning Process Questionnaire with students of lower academic attainment.

The Learning Process Questionnaire was administered to 692 secondary school students (308 boys, 380 girls, and 4 unspecified) in the Philippines. The ages of the participants ranged from 14 to 22 years, with an average of 15 yr. An exploratory factor-analysis procedure was conducted for the entire sample, for the lower achievers (n = 333), and for higher achievers (n = 359). The factor structure of the Learning Process Questionnaire was uninterpretable with data obtained from students of lower academic achievement.

[Early assessment in perinatal hypoxia. Prognostic markers]. / Evaluación precoz en la hipoxia perinatal. Marcadores pronósticos.

INTRODUCTION: Perinatal asphyxia and its neurological signs are the most important cause of brain damage and neurological sequelae in full term newborn babies. Neuroprotection treatments currently being investigated promise to reduce such sequelae, but these treatments are not without risk and the patients involved should be selected. OBJECTIVE: To analyze a scale composed of variables recorded from the start of delivery until the fourth hour of life, comparing the neurological evolution of the patients. By means of this scale we aim to establish a criterion for the selection of neonates with acute perinatal asphyxia, who would benefit from neuroprotector treatment. PATIENTS AND METHODS: A retrospective study was made of 50 patients with the diagnosis of perinatal asphyxia. Our scale was formed of the following variables: intrauterine meconiorrhexis, pathological cardiotocographic recordings, resuscitation at birth, Apgar score at five minutes, pH of the umbilical artery blood, neurological examination, multisystemic involvement, seizures, persistent metabolic acidosis and need for mechanical ventilation during the first hours of life. The patients were followed up for at least one year by means of periodical studies (neurological examination and evaluation of psychomotor development according to the Brunnet Lezinne test). For statistical analysis we used the chi squared test, Fisher's exact test, Kruskal-Wallis test and the area beneath the ROC curve. RESULTS AND CONCLUSIONS: The scale presented constitutes a rapid, easy method which is statistically significant for the selection of perinatal asphyxia of high neurological risk which would benefit from neuroprotector treatment after the event.