Rehearsal in Spatial Working Memory: Evidence From Neuroimaging

A variety of biological evidence has identified a frontal-parietal circuit underlying spatial working memory for visual stimuli. But the question remains, how do these neural regions accomplish the goal of maintaining location information on-line? We tested the hypothesis that the active rehearsal of spatial information in working memory is accomplished by means of focal shifts of spatial selective attention to memorized locations. Spatial selective attention has been shown to cause changes in the early visual processing of stimuli that appear in attended locations. Thus, the hypothesis of attention-based rehearsal predicts similar modulations of visual processing at memorized locations. We used functional magnetic resonance imaging to observe posterior visual activations during the performance of a spatial working memory task. In line with the hypothesis, spatial rehearsal led to enhanced activation in the early visual areas contralateral to the memorized locations.     

Sex Differences, Attributional Style, and Depressive Symptoms Among Adolescents

This study examined attributional style, sex, and depressive symptoms and diagnosis in high school students. The results revealed that (1) for females and males, higher levels of depressive symptoms correlated with a more depressive attributional style; (2) females and males who met diagnostic criteria for a current depressive disorder evidenced more depres-sogenic attributions than psychiatric controls, and never and past depressed adolescents; (3) although no sex differences in terms of attributional patterns for positive events, negative events, or for positive and negative events combined emerged, sex differences were revealed on a number of dimensional scores; (4) across the Children's Attributional Style Questionnaire (CASQ) subscale and dimensional scores, the relation between attributions and current self-reported depressive symptoms was stronger for females than males; and (5) no Sex × Diagnostic Group Status interaction effects emerged for CASQ subscale or dimensional scores. Implications of the complex findings from this large-scale, methodologically sophisticated study are addressed.     

Sex role identification and young women's irrational beliefs

The present study was designed to examine the relationship between young women's beliefs about approval, frustration, and dependency and their sex-role identification. Sixty-six college women responded to a questionnaire which contained the Irrational Beliefs Test (Jones, 1969) and the Multidimensional Sex Role Inventory (MSRI; Bernard, 1981). As predicted, women who score high in irrational beliefs concerning approval, frustration, and dependency also scored higher on the MSRI scale pertaining to anxiety and neuroticism than did their more rational counterparts. Also, the high irrational group scored lower than did the low irrational group on the MSRI scale measuring instrumental-agentic traits. These results have two implications for feminist RET psychotherapists. First, they clarify the value of using instruments to assess both irrational beliefs and sex role identification in treatment planning. Secondly, they sensitize the psychotherapist to the impact of sex-role socialization and identification on the psychological adjustment of young women.This article is based in part on a master's thesis completed by Tracy L. Vining, M.A.The authors thank William Tooke, Ph.D., for his helpful advice.Tracy L. Vining, M.A., is a School Psychologist at the Wayne Finger Lakes BOCES in Rushville, N.Y. William P. Gaeddert, Ph.D., is an Associate Professor in the Psychology Department at SUNY-Plattsburgh, and Naomi B. McCormick is a Professor in the Psychology Department at SUNY-Plattsburgh and a Fellow of the Institute for Rational-Emotive Therapy.     

Dominance as a function of cue similarity: A test of the intrinsic cue dominance model

A nonselective model postulating intrinsic cue dominance was tested in simultaneous discrimination tasks involving reversal on one dimension. In this procedure two dimensions are relevant throughout training; however, following initial discrimination training the reward contingency is reversed for one dimension but maintained for the other. Cue dominance was assessed following acquisition of reversal by the use of opposed-cues test trials, and was defined as a greater number of choices of the test compound containing the positive cue of the reversed dimension than of the test compound containing the positive cue of the maintained dimension. In Experiment I, brightness cues dominated orientation cues. In Experiment II, which employed two different sets of relevant cues, more disparate brightness cues dominated the orientation cues for one set and orientation cues dominated less disparate brightness cues for the other. From this, it was concluded that dominance is a function of relative cue similarity.     

Covert behavior as a direct electromyographic measure of mediating responses

Electromyographic (EMG) measures (in addition to eye activity, and electroencephalograms, EEG) were taken from the tongue and arms of children under conditions of verbal oral mediation, non-oral (leg and arm) mediation based on the concepts of right and left, and no-mediation. It was found that amplitude of tongue EMG (a measure of covert oral behavior) significantly increased only for the Verbal Mediation Group, and the increase was significantly greater than for the other two (control) groups. The arms were possible loci of mediational behavior for the Non-oral Mediation Group; arm EMG was relatively large under this non-oral mediation condition, the changes being significant for the left arm. Eye movements, possible indicators of right and left mediational activity, were greater under the non-oral mediation condition, too. These psychophysiological measures of covert behavior during mediation are thus consistent with verbal mediational theory that has been based on the study of overt behavior.     

Wavelength generalization and preference in monochromatically reared ducklings

Two experiments determined the effects of early color experience on gradients of wavelength generalization. In each experiment, one group of ducklings was raised in monochromatic (589 nanometers) sodium-vapor light and a second group, in white light. In Exp. I, ducklings pecked a key transilluminated by 589 nanometers. In a subsequent test, the group raised in white light produced steeper gradients. However, several monochromatically reared ducklings produced gradients as steep as those for the white-reared ducklings. In Exp. II, ducklings pecked a white line. In a subsequent test, using a fully illuminated key, subjects in both groups responded more often to "green" (510, 530, 550, or 570 nanometers) than to "non-green" wavelengths (490, 589, 610, or 650 nanometers). Ducklings raised in monochromatic light preferred shorter "green" wavelengths than ducklings raised in white light. This difference between the "green" preferences for the two groups accounted for most of the differences between the gradients of wavelength generalization obtained from the two groups in Exp. I after training at 589 nanometers.     

Developmental and Adjustment Issues of Gay, Lesbian, and Bisexual Adolescents: A Review of the Empirical Literature

Various studies have reported adjustment problems experienced by gay, lesbian, and bisexual (GLB) adolescents. A primary purpose of this paper is to critically review this literature. Difficulties that have been studied include past suicide attempts, substance use and abuse, conduct problems, and academic concerns. For example, a considerable number of GLB youth report a history of suicide attempts, with prevalence rates ranging from 11 to 42%. However, among other methodological concerns, studies in this area have not used a comparison sample of heterosexual youths. Characteristics of development particular to GLB adolescents are described, the empirical research on adjustment issues is reviewed, and potential risk and protective factors for GLB youths are discussed.     

Coreference processing and levels of analysis in object-relative constructions; Demonstration of antecedent reactivation with the cross-modal priming paradigm

This paper is concerned with two related issues in sentence processing-one methodological and one theoretical. Methodologically, it provides an unconfounded test of the ability of the cross-modal lexical priming task, when used appropriately, to provide detailed evidence about the time-course of antecedent reactivation during sentence processing. Theoretically, it provides a study of the nature of the representation that is examined when a reference-seeking element is linked to its antecedent during the processing of object-relative clause constructions. In these studies, subjects heard sentences which contained a lexical ambiguity placed in a strong biasing context. In one study this ambiguous word was the moved or fronted object of the verb in an object-relative construction. A cross-modal lexical priming (CMLP) naming task was used to determine whether one or more of the meanings of the ambiguity are activated at three temporally distinct points during the sentence: (1) immediately after the lexical ambiguity (Study 1); (2) a later point that was 700 milliseconds before the offset of the main verb (Study 2); (3) immediately after this main verb (at the gap in this filler-gap construction) (Study 2). The probes in the CMLP task were controlled for potential confounds. The results demonstrate the following: At Test Point 1, all meanings of the ambiguity were activated; at Test Point 2, neither meaning of the ambiguity was (still) activated; at Test Point 3, only a single (context-relevant) meaning of the ambiguity was reactivated. It is concluded that an underlying (deep; non-surface-level) memorial representation of the sentence is examined during the process of linking an antecedent to a structural position requiring a referent, and that the CMLP task provides an unbiased measure of this reactivation. Further, it is concluded that this effect cannot be accounted for under a compound cue (Ratcliff & McKoon, 1994) explanation.The authors gratefully acknowledge the contributions of an anonymous reviewer for helpful suggestions and changes in this paper, and the support of a fellowship to the first author from grant T32 DC 00041 and NIH grant ROI DC00494 (to the second author) for this work.     

A research note on occupational changes for Louisiana urban females, 1960–1970

Occupational distributions for sex and race comparisons for areas of Louisiana are examined through an index of dissimilarity, D, a measure of the percentage of workers who must change occupational categories for the two compared percentage occupational distributions to be the same. In 1960 the more urban the area, the lower the index; indices are higher for blacks for male-female comparisons and higher for females than for males in cross-race comparisons. These patterns hold for 1970, but D decreased for all comparisons, indicating a trend toward similarity in compared occupational distributions, but the ultimate limit is unknown.     

The effect of training and stimulus variables on the reversal-shift ontogeny

Linear functions fitted to the proportion of optional reversal-shifts as a function of log CA were used to assess the effect of stimulus and training variables on the reversal-shift ontogeny. The results were: (1) when the dimensional salience of the two sets of cues in the stimulus compound were similar, there was no significantly different effect of size, color, or form cues on the rate parameter, suggesting that the rates of mediational development for these cues are similar. Reversal-shifts were, however, more likely with the color-form compound than with the size-color compounds throughout the tested age span, indicating that some stimulus conditions are more likely than others to produce mediated processing at all age levels. (2) The facilitative effects of labelling on reversal-shifts were greatest at the younger ages and decreased systematically over age. (3) Overtraining increased reversal-shifts at most ages but whether the facilitative effect interacts with age remains moot. (4) Neither labelling nor overtraining eliminated ontogenetic differences.