Maximum likelihood solution to factor analysis when some factors are completely specified

In the factor-analytic model, let some of the factors be known (i.e., the factor loadings are given in advance; they maye.g. be obtained from some previous analyses). However, their covariance matrix may, or may not, be known. The remaining factors (if any) are assumed to be uncorrelated among themselves and to the first set. For this model, the maximum likelihood equations are obtained and an iterative method for the solution is proposed.The work was done while the author was at Deutsches Rechenzentrum, Darmstadt, Germany.     

Comparison of intrusion errors and serial position curves on monaural and dichotic listening tasks: A developmental analysis

Based on a repeated measurement study of 7-, 10-, 14-, and 17-year-olds with monaural and dichotic presentations of word lists varying in associative structure and presentation rate, intrusion and serial position dependent variables were analyzed. Intrusion analyses supported previous reports on word list recall; vis, 7- and 10-year-olds recalled fewer words from monaural and dichotic lists and had more intrusive errors than adolescents. Based on similar orders of report (strategies) for monaural and dichotic word presentations, serial position curves for the two types of presentation were compared. Within-age comparisons were strikingly similar. Between-age comparisons of monaural and dichotic presentation serial position curves support the notion that there are ontogenetic limitations in memory structure and control processes.     

De beteekenis van Moritz Schlick voor de wijsbegeerte

Ohne Zusammenfassung     

On Silencing and Systematicity: The Challenge of the Drowning Case

Silencing is a speech‐related harm. We here focus on one particular account of silencing offered by Jennifer Hornsby and Rae Langton. According to this account, silencing is systematically generated, illocutionary‐communicative failure (of a very specific sort). We here raise an apparent challenge to that account. In particular, we offer an example—the drowning case—that meets these conditions of silencing but does not intuitively seem to be an instance of it. First, we explore several conditions one might add to the Hornsby‐Langton account, but we argue that none are satisfactory. Then, we further explore the systematicity condition, which is insufficiently characterized in the current literature. Although we explore several promising ways to further characterize this condition, we ultimately conclude that more work needs to be done. Consequently, because this systematicity condition is under‐specified, the Hornsby‐Langton account of silencing is incomplete.     

What Remains of the Fundamentum Inconcussum in Light of the Modern Sciences of Man?

Transcendental conceptions of subjectivity, beginning with Descartes and including Kant, Fichte, and Husserl as well as neo-transcendental accounts of the 20th century, try to explicate a subject’s subjectivity as a necessary condition for all theoretical and practical validity claims. According to this conception, only this subject-theoretical presupposition allows for an adequate foundation of terms of authorship of action (autonomy) and self-determination. However, the conceptual self-explication of this position faces some inherent difficulties, which has repeatedly been pointed out even by representatives of this school of thought themselves. Moreover, it seems as if the constitutional achievements of transcendental philosophy are increasingly being detached from philosophy: due to the development of the modern sciences of man, they are step by step conceived as objects of empirical research. This paper looks critically into this thesis of detachment.     

The reciprocal relation between sleep and memory in infancy: Memory‐dependent adjustment of sleep spindles and spindle‐dependent improvement of memories

Sleep spindle activity in infants supports their formation of generalized memories during sleep, indicating that specific sleep processes affect the consolidation of memories early in life. Characteristics of sleep spindles depend on the infant's developmental state and are known to be associated with trait‐like factors such as intelligence. It is, however, largely unknown which state‐like factors affect sleep spindles in infancy. By varying infants’ wake experience in a within‐subject design, here we provide evidence for a learning‐ and memory‐dependent modulation of infant spindle activity. In a lexical‐semantic learning session before a nap, 14‐ to 16‐month‐old infants were exposed to unknown words as labels for exemplars of unknown object categories. In a memory test on the next day, generalization to novel category exemplars was tested. In a nonlearning control session preceding a nap on another day, the same infants heard known words as labels for exemplars of already known categories. Central–parietal fast sleep spindles increased after the encoding of unknown object–word pairings compared to known pairings, evidencing that an infant's spindle activity varies depending on its prior knowledge for newly encoded information. Correlations suggest that enhanced spindle activity was particularly triggered, when similar unknown pairings were not generalized immediately during encoding. The spindle increase triggered by previously not generalized object–word pairings, moreover, boosted the formation of generalized memories for these pairings. Overall, the results provide first evidence for a fine‐tuned regulation of infant sleep quality according to current consolidation requirements, which improves the infant long‐term memory for new experiences.     

The Dimensionality of Right-Wing Authoritarianism: Lessons from the Dilemma between Theory and Measurement

The RWA Scale ( Altemeyer, 1981 , 1988 , 1996 ) is commonly regarded as the best measure of right-wing authoritarianism. The one-dimensional instrument assesses the covariation of three attitudinal clusters: authoritarian submission, authoritarian aggression, and conventionalism. The incongruence between the implicit conceptual dimensionality on the one hand and methodological operationalization on the other makes room for discussion about whether it would be advantageous to measure the 3 facets of RWA separately. I rely on three arguments: (1) confirmatory factor analyses showing that three-dimensional scales fit the data better than the conventional one-dimensional practice; (2) the dimensions showing a considerable interdimension discrepancy in their capability to explain validation criteria; and (3) the dimensions showing an intradimensional discrepancy which is dependent upon the research question. The argumentation is illustrated by empirical evidence from several Web-based studies among German Internet users.