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Theoretische Analysen zum Problem des Recht-Schreibens weisen darauf hin, daß weniger Intelligenzmerkmale als vielmehr Gedächtnis'eistungen bei dem Erwerb der Schriftsprache von Bedeutung sind. Daraus folgt, daß für die Prüfwörter in normierten Rechtschreibtests zumindest hinreichende Vorkommensfrequenz gewährleistet sein sollte. Diese Frage wird in der vorliegenden Untersuchung am Beispiel des Allgemeinen Schulleistungstests überprüft: für die ausgewählten Klassenstufen kann gezeigt INerden, daß die Vorkommenshäufigkeit der PrüfWÖfter nicht ausreicht und damit wenig geeignet ist, um die tatsächliche Rechtschreibfertigkeit zu erfassen. Der Vergleich mit mehreren eng am Curriculum orientierten Diktatproben kann gleichzeitig die Schwierigkeiten verdeutlichen, die dann entstehen, wenn zuverlässige Bestimmungen der individuellen Rechtschreibkompetenz vorgenommen werden sollen.
No abstract available
Vorgestellt wird ein Versuch, die in der einschlägigen literatur postulierte multifaktorielle Bedingtheit von Rechtschreibleistungen in der Grundschule über ein angemessenes methodisches Design zu prüfen. Zentral ist dabei die Frage, ob sich identische Kausalstrukturen für beginnende und geübte Rechtschreiber (Schüler der zweiten w. vierten Klasse) nachweisen lassen. Konventioneffe Verfahren der Kausafanafysa hatten sich in der Primärstudie (Schneider 1980) als unökonomisch und wenig aussagekräftig erwiesen, 10 daß in der Sekundäranalvse auf eine flexiblere Prozedur zurückgegriffen wird. Mit diesem Verfahren zur AnaIVse von Strukturgleichungssysteman (LiSREL) ist es möglich, für die Gruppe der Zweitund Viertkläßler Modelle zu entwickeln und zu überprüfen, die mit den Ausgangsdaten kompatibel sind. Als wesentliches Ergebnis zeigt sich, daß die theoretisch postulierte Bedingungsstruktur nur für die Viertkläßler (eingeschränkt) bestätigt werden kann, während für die Schüler der zweiten Klassenstufe ein grundlegend verschiedenes Muster resultiert.
This study addresses three themes that recur in the research on student achievement: (a) developmental modeling ofintraindividual changes in achievement over time; (b) examination of the differences among subgroups within a classroom in the determinants of achievement; (c) description of the interactions among instructional variables in determining achievement differences. Eight classrooms were preselected on the basis of their widely differing slopes obtained in a regression analysis of pre- and posttest achievement scores. Mathematics achievement differences among sixth graders were analyzed in a four-wave design and explained by aptitude and instructional variables in a structural equation framework provided by LISREL. The results demonstrate the local nature of achievement models in that neither their measurement nor structural components proved generalizable across both groups of classrooms. Mention is also made, however, of technical problems and analytical ambiguities in the interpretation of these results.
No abstract available
Nine hierarchical and four nonhierarchical clustering algorithms were compared on their ability to resolve 200 multivariate normal mixtures. The effects of coverage, similarity measures, and cluster overlap were studied by including different levels of coverage for the hierarchical algorithms, Euclidean distances and Pearson correlation coefficients, and truncated multivariate normal mixtures in the analysis. The results confirmed the findings of previous Monte Carlo studies on clustering procedures in that accuracy was inversely related to coverage, and that algorithms using correlation as the similarity measure were significantly more accurate than those using Euclidean distances. No evidence was found for the assumption that the positive effects of the use of correlation coefficients are confined to unconstrained mixture models.
Thirty-two 4-year-olds and thirty-two 6-year-olds were tested for free and cued recall following either play-and-remember or sort-and-remember instructions and assessed for their metamemory of the efficacy of conceptual and perceptual sorting strategies. The younger children recalled significantly more items under sort-and-remember than under play-and-remember instructions, whereas no significant recall differences between instructional conditions were found for the older children. However, 6-year-olds showed higher levels of recall than 4-year-olds in both instructional conditions. Category cues were much more effective than color cues, regardless of age. In addition, clustering scores indicated that conceptual organization at both encoding and retrieval increased with age and with instruction. These results show that from 4 to 6 years of age children are learning to spontaneously employ memory strategies. In addition, they highlight the increasing importance of conceptual organization to retention of young children. Finally, the metamemory data suggest that there may be a lag between children’s articulated declarative knowledge about the usefulness of conceptual organization and their procedural use of it.
The present study investigated the relationshtp between developmental shifts in the organization of materials and developmental changes in deliberate strategy use. Second and fourth grade children were presented with clusterable sort/recall lists representing the factorial combinations of high and low interitem association, and high and low category relatedness. Strategy use in the task was rated by the experimenter and also assessed via self reports. General and task-related strategy knowledge tmetamemoryt was also examined. Second graders displayed more category clustering during recall for highly associated items than for weakly associated items. whereas older children’s recall organization (but not recall) was unaffected by this organizational dimension. Correlations among measures of metamemory and organizational behavior indicated that second graders in general were unaware of the importance of categorization strategies for facilitation of recall. On the other hand. sorting during study and task-related metamemory were the most important predictors of fourth graders’ recall performance, thus indicating that most fourth graders used categorization strategies deliberately.