Children's comprehension of semantic constraints on temporal prepositions

Children's comprehension of the semantic rules for temporal prepositions was investigated. The temporal prepositions werein, on, andat. Lech's (1969) semantic analysis was used as the framework for the study. The contextual property [(x)]→TIM[PERI] with its related constraints indicates the ill-formedness of phrases like^* in noon,^* on January and^* at Saturday. Correct usage of these prepositions is based on the implicit distinction between time with or without duration (period versus moment). Comprehension differences among the prepositions, based on semantic differences were hypothesized, as well as developmental differences across age levels. Thirty-five children at each of three levels (kindergarten, grades 2, and 4) in Experiment 1, and 24 grade 4 children in Experiment 2, judged the appropriateness of sentences containing temporal prepositions and attempted to revise the ill-formed sentences. Significant developmental differences were observed. Kindergarten children could not discriminate between well- and ill-formed sentences; second grade children could discriminate but could not identify the reason for their discrimination, nor could they revise the ill-formed sentences. Fourth grade children could discriminate and identify or revise the ill-formedness. Ability to revise the prepositions was found to be related to cognitive developmental level. None of the children in either experiment were able to articulate the periodicity-moment temporal distinction which provides the basis for the semantic constraints. The awareness of semantic rules for temporal prepositions may be relatively late in developing, perhaps between the ages of 8 and 10 years. An advanced awareness of these rules may develop considerably later.     

Knowledge of the alphabet: A comparison between letter counts and subjective reports

Subjects’ estimates of the frequency of occurrence of the letters of the alphabet were compared with previously reported letter-frequency counts. The results indicated an overall good relationship between actual and judged rank, but there were consistent letter-specific under- and overestimations. These inaccuracies were not accounted for by letter versatility, first-position frequency, or order in the alphabet. There was evidence that subject-derived estimates of letter frequency were somewhat better predictors of reaction time performance on letter-processing tasks.     

Visual memory and stimulus repetition effects

Recent investigations of memory for randomly configured patterns indicate that visual memory can involve distinct short-term and long-term components. The appearance of a visual recency effect that is confined to the last-presented item is believed to result from the active visualization of this item during the retention interval. Studies of the retention of familiar visual information have also suggested that the short-term effects observed are a result of active visualization. In a review of these studies, however, we argue that the effects obtained with familiar visual information are not necessarily a result of active visualization and, indeed, may not involve anything other than long-term visual memory. For example, Rabbitt and Vyas (1979) observed a visual recency effect in a serial choice reaction time task involving familiar information. That this recency effect was confined to the final item accords with the results obtained with unfamiliar visual information. However, this choice reaction time task did not require subjects to remember previous stimuli, so it is unlikely that they actively visualized them. With the case for a distinct short-term visual memory currently resting on the recency effect interpreted as reflecting a process of active visualization, this result is especially important. In the second part of the present paper, we report a series of experiments that provides an understanding of the visual recency effect in the serial choice reaction time task. We conclude from these studies that this effect is not due to visualization or to a visual trace either decaying or being overwritten by a succeeding stimulus.     

Sequential item selection: Optimal and heuristic policies

This paper considers testing in which the goal is to minimize the number of test items required to establish a learner's state of ability. Focus is on optimal or near optimal selection over a well-defined universe of items or stimuli. Selection policies are determined for the case in which the items have hierarchical or partial hierarchical relationships. Derivation of an optimal policy rests upon techniques from dynamic programming. For situations in which an optimal policy may be too costly to compute, two heuristic approximations are offered. One heuristic counts the hypothetical estimates of ability that remain tenable following a response to each item and chooses the item that minimizes the expectation of that number. The other selects the item that maximizes the statistic of information.     

A user-interactive graphics-based computer system for analysis of the EEG

Computer technology provides a powerful high-resolution tool for the analysis and understanding of the electroencephalogram (EEG). A system of user-interactive graphics-based computer programs analyzing the power spectral density (PSD), coherence, and phase-angle relationships of the EEG is described, along with the mathematical algorithms used. The analytic variables inherent in coherence analysis are reviewed. These variables include choices of sampling parameters, auto- and cross-spectral algorithms, smoothing techniques, and use of the γ²(f) or γ(f) value for coherence. These variables in the analysis itself have a net interactive effect on the calculated results that often makes comparability of data across studies impossible. Thus, it is proposed that studies include a graph showing the authors’ derived coherence values for a set of standard test signals to enhance scientific communication.     

Dimensionality of women's career orientation

Two factor analytic studies were conducted in order to determine the dimensionality of women's career orientation defined by various extant measures. In Study I, 86 women employed by an insurance company responded to nine different measures of career orientation. A principal axis analysis produced two oblique factors, which were tentatively named Career Centeredness and Career Commitment, respectively. Study II sought to validate the factors found in Study I in a sample of 335 university women in various disciplines and at various class levels. Using the factor pattern from Study I as the target matrix, a restricted maximum likelihood factor analysis showed that two factors similar to those in Study I accounted for all the significant common variance. Based on both statistical criteria and psychological meaningfulness, the two oblique (r=.43) factors were again named Career Centeredness (lifestyle in which one's career is regarded as more important, time consuming, and satisfying than other aspects of life, particularly family) and Career Commitment (lifestyle involving continued employment throughout life stages regardless of financial need or competing obligations). These findings are discussed in the context of changing societal support for women's roles in business.This report is based on a portion of the first author's doctoral dissertation, supervised by the second author, done in the Department of Psychology of New York University.Both authors are currently at Merrill Lynch, 165 Broadway, New York, New York 10080.     

Book reviews

A Reader on Classical Islam. F. E. Peters, 1994. Princeton, Princeton University Press. 420 pp., hb. £30.50, ISBN 0–691–03394–3; pb. £15.00, ISBN 0–691–00040–9.

The Physical Theory of Kalam: atoms, space and void in Basrian Mu'tazili cosmology. (Islamic Philosophy, Theology and Science, Vol. XIV). Alnoor Dhanani, 1994. Leiden, E. J. Brill. 209 pp., hb. n.p., ISBN 90–04–09831–3.

Empire to Commonwealth: consequences of monotheism in late antiquity. Garth Fowden, 1993. Princeton, Princeton University Press. 205 pp., hb. £12.95, ISBN 0–691–06989–1.

Religions in the UK: a multi‐faith directory. Paul Weller (Ed.), 1993. Derby, University of Derby in association with the Interfaith Network for the United Kingdom. 630 pp. plus indices, pb. £21.50, ISBN 0–901437–06–9.

Islamic Britain: religion, politics and identity among British Muslims: Bradford in the 1990s. Philip Lewis, 1994. London, I. B. Tauris. 250 pp., pb. £9.95, ISBN 1–85043–861–7.

Bosnia and Hercegovina: a tradition betrayed. Robert J. Donia and John V. A. Fine, Jr., 1994. London, Hurst and Company. 280 pp., hb. £9.50, ISBN 1–85065–211–2.

French and Algerian Identities from Colonial Times to the Present: a century of interaction. Alec G. Hargreaves and Michael J. Heffernan (Eds), 1993. Lampeter, The Edwin Mellen Press. 253 pp., hb. £39.95, ISBN 0–7734–9233‐X.

The Course of Islam in Africa. (Islamic Surveys 15). Mervyn Hiskett, 1994. Edinburgh, Edinburgh University Press. 218 pp., hb. £35.00, ISBN 0–7486–0464–2; pb. £16.95, ISBN 0–7486–0461–8.

The Writings of Eastern Sudanic Africa to c. 1900. R. S. O'Fahey (comp.) 1994. Leiden, E. J. Brill. 434 pp., hb. n.p., ISBN 90–04–09450–4.