Caregivers Dependent upon Drivers with Dementia

This paper reports findings of a preliminary study of caregivers dependent upon drivers with dementia. Fifteen caregivers who perceived themselves as dependent upon their partner for transportation and 15 who perceived themselves as independent were surveyed. Dependent caregivers were significantly more likely to rely on the cognitively impaired driver for routine daily activities such as shopping, medical appointments, and visiting family and friends. Only 20% of the dependent caregivers believed that the driver with dementia should decrease or discontinue driving. Dependent caregivers were less likely than independent caregivers to take an active approach in encouraging driving cessation. Compared to the independent caregivers, the dependent caregivers believed that if the patient with dementia could no longer drive, it would significantly affect their quality of life. The authors discuss the issues and problems uniquely associated with the dependent caregiver.     

Visual Prior Entry

It has long been claimed that attended stimuli are perceived prior to unattended stimuli–the doctrine of prior entry. Most, if not all, studies on which such claims have been based, however, are open to a nonattentional interpretation involving response bias, leading some researchers to assert that prior entry may not exist. Given this controversy, we introduce a novel methodology to minimize the effect of response bias by manipulating attention and response demands in orthogonal dimensions. Attention was oriented to the left or right (i.e., spatially), but instead of reporting on the basis of location, observers reported the order (first or second) of vertical versus horizontal line segments. Although second-order response biases were demonstrated, effects of attention in accordance with the law of prior entry were clearly obtained following both exogenous and endogenous attentional cuing.     

The influence of color on transient system activity: Implications for dyslexia research

University of Wollongong, Wollongong, New South Wales, Australia Metacontrast and apparent motion experiments designed to utilize transient system resources were adopted to investigate the proposal that transient system activity is differentially influenced by different colored stimuli. The results generally showed no effect of color on transient system activity in either adults or children. However, the predicted pattern of results was demonstrated when contrast rather than color was manipulated in a final metacontrast experiment. We discuss the tenuousness of the proposal that color differentially influences transient activity, exploring its physiological implications and its durability as a theory of transient activity regarding reading-disability research.     

The Conceptualization of Anxiety: An Exploratory Study of Japanese American Older Adults

Few empirical studies exist on the mental health of Japanese American older adults. This study focused on how Japanese American older adults conceptualize anxiety. Participants were presented with a checklist, which included anxiety and depression symptoms identified in a previous qualitative study conducted by the authors, as well as symptoms from Generalized Anxiety Disorder in the Statistical Manual of Mental Disorders, Fourth Edition (DSM-IVrpar;. They were asked to imagine a Japanese American older adult who was experiencing anxiety and check off the symptoms he/she would be experiencing. Results indicated that these Japanese American participants conceptualized anxiety by using more depressive symptoms than anxiety symptoms. In addition, contrary to previous research and speculation about how Asian Americans experience psychological distress, participants also checked a larger number of cognitive symptoms as opposed to somatic symptoms. The present data suggest that Japanese American older adults conceptualize anxiety differently from the traditional psychiatric conceptualization of anxiety. Thus, clinicians and researchers should not generalize symptoms of psychological distress developed and researched on nonminority older adults to ethnic minority adults, and should consider such ethnic group differences in their assessment and treatment methods for ethnic minority adults.     

The effects of scene inversion on change blindness

In two experiments, participants searched for a difference between two views of a scene. In Experiment 1, the authors extended the change-blindness findings from previous work by R. A. Rensink, J. K. O'Regan, and J. J. Clark (1997), which used an experimenter-induced global transient, to a less artificial situation in which participants searched for a difference in a pair of photographic images presented simultaneously. To examine the idea that meaning-driven endogenous orienting was responsible for the previously observed advantage for changes in center-of-interest items, the authors inverted half of the image pairs. The advantage for center-of-interest items was replicated with upright displays, but it was completely eliminated by inversion, strongly supporting the role of meaning-driven endogenous orienting in this task. With flickering displays (Experiment 2), the center-of-interest effect was completely unaffected by inversion. The authors suggest that when change blindness is induced via flicker, scene modifications are typically found by stimulus-driven rather than by meaning-driven processes.     

The assessment of analogical thinking modifiability among regular,special education,disadvantaged, and mentally retarded children

The objectives of the current study were (a) to develop a measure of children's analogical thinking modifiability (CATM) based on the Feuerstein, Rand, and Hoffman (1979) theory of dynamic assessment of cognitive modifiability, (b) to compare the performance of groups assumed to be differentially modified by intervention, (c) to compare CATM performance with performance on a conventional test, and (d) to study qualitative changes after a learning process. Subjects were disdvantaged, regular, and special education kindergarten children (N=140), and mentally retarded children (N=20). The CATM was administered together with the Ravens Colored Progressive Matrices (RCPM) in a balanced order. Disadvantaged and regular children achieved higher gain scores than other groups in both none-or-all and partial credit methods (p < 01). The MR and the special education groups showed small gains according to the none-or-all credit method; however, according to the partial credit method, the MR group showed high gains and the special education group a performance decrease. Performance scores on the CATM were higher than on the RCPM, especially in comparison to the B₈-B₁₂ items-differences reach a peak of 61% and 67% for the disadvantaged and regular groups, respectively. Qualitative analysis indicated that form mistakes were most resistant to change, whereas color mistakes were most easy to modify. Results were explained within Feuerstein's theoretical framework of cognitive modifiability. Impaired cognitive functions as well as analytic versus synthetic processes were suggested to explain group differences.This research was supported in part by the Internal Research Fund, Bar-Ilan University. We wish to express our appreciation to the children and their teachers for their participation, to Frida Spanier for teaching and data collection, and to Steve Greenwald for data analysis.     

Is Posner's "beam" the same as Treisman's "glue"?: On the relation between visual orienting and feature integration theory

In the present study we investigated whether the visually allocated "beam" studied by Posner and others is the same visual attentional resource that performs the role of feature integration in Treisman's model. Subjects were cued to attend to a certain spatial location by a visual cue, and performance at expected and unexpected stimulus locations was compared. Subjects searched for a target letter (R) with distractor letters that either could give rise to illusory conjunctions (PQ) or could not (PB). Results from three separate experiments showed that orienting attention in response to central cues (endogenous orienting) showed similar effects for both conjunction and feature search. However, when attention was oriented with peripheral visual cues (exogenous orienting), conjunction search showed larger effects of attention than did feature search. It is suggested that the attentional systems that are oriented in response to central and peripheral cues may not be the same and that only the latter performs a role in feature integration. Possibilities for future research are discussed.     

The Elusiveness of Gustatory Potentiation of an Environmental Aversion

Two experiments investigated conditions that influence whether or not the presence of a flavor cue potentiates acquisition of an environmental aversion. Experiments 1 and 2 exposed rats to either a salient sucrose flavor or nonsalient water with black box-illness pairings. Half of the rats in the sucrose and water treatment groups became ill after exposure to the black chamber in their home cage. The other half of the rats in the two treatment conditions became ill in the black box. The results of each study indicated that a strong environmental aversion was established when illness was associated with exposure to the black box. The aversiveness of the black chamber was indicated by both less time spent in the black side and reduced intake in the black chamber. The presence of sucrose during conditioning did produce a stronger black box aversion than did water. Reliable potentiation of the environmental aversion, however, was seen only when the illness experience occurred in the black chamber but not when illness occurred in the home cage. A weaker aversion to the black chamber was also found in the water groups when illness occurred shortly after experience with the black box than when illness immediately followed exposure to the black chamber.

     

Elaboration, organization, and the self-reference effect in memory

Relating information to the self (self-referent encoding) has been shown to produce better recall than purely semantic encoding. This finding has been interpreted as demonstrating that self-reference produces a more elaborate memory trace than semantic encoding, and it has been cited frequently as evidence that the self is one of the most highly elaborated structures in memory. The experiments reported in this article challenge this interpretation of the self-reference effect by demonstrating that self-referent and semantic encodings produce virtually identical free recall levels if they are first equated for the amount of organization they encourage. On the basis of our findings we conclude the following: Organization, not elaboration, is responsible for the superior recall performance obtained when information is encoded self-referentially, and organization is not a necessary component of self-referent encoding and can be orthogonally varied within self-referent and semantic encoding tasks. Finally, we discuss how a single-factor theory based on organization can account for many of the self-referent recall findings reported in the literature.